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1. B-physics prospects with ATLAS and CMS at the LHC

Author

D. Vité

Subjects
Physics, Particle physics, Large Hadron Collider, Physics::Instrumentation and Detectors, High Energy Physics::Phenomenology, Standard Model, law.invention, Nuclear physics, medicine.anatomical_structure, General purpose, Atlas (anatomy), law, medicine, Physics::Accelerator Physics, High Energy Physics::Experiment, General Agricultural and Biological Sciences, Collider, Compact Muon Solenoid
Abstract

TheLarge Hadron Collider (LHC) is in preparation at CERN, and the ATLAS (A Toroidal LHC Apparatus) and CMS (Compact Muon Solenoid) Collaborations have recently presented Technical Proposals for the construction of two general purpose experiments. Even though ATLAS and CMS are primarily conceived and optimized for high-luminosity LHC operation, namely in view of Standard Model and Minimal Supersymmetric Standard ModelHiggs searches, the first few years of low-luminosity operation, thanks to the high centre-of-mass energy of the LHC collider experiments with two 7 TeV proton beams, will also allow investigation of B-physics issues, which are influencing the designs of the detectors. Prospects for B physics will be described and compared, in particularCP violation, with time-dependent and time-integrated asymmetries for different channels and related sensitivities to theCP-violating parameters, oscillations and rare decays. Conclusions and possible improvements will be summarized.

Published
1996
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2. Beam test of a prototype readout system for precision tracking detectors at LHC

Author

L. Jones, K. Gill, R. Payne, Stephen Watts, Michel Raymond, Geoffrey Hall, J. Matheson, R. Wheadon, B. C. MacEvoy, M. Millmore, G. Howell, M.J. French, W. Langhans, D. Vité, Francois Vasey, and G. Stefanini

Subjects
Physics, Nuclear and High Energy Physics, Large Hadron Collider, Optical fiber, Physics::Instrumentation and Detectors, business.industry, Detector, ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION, Chip, Tracking (particle physics), Line (electrical engineering), law.invention, Optics, CMOS, law, Detectors and Experimental Techniques, business, Instrumentation, Beam (structure)
Abstract

A prototype of a readout system developed for high spatial precision tracking detectors at LHC has been tested in a beam at CERN. It is based on a radiation hard CMOS front-end chip which includes signal amplification, storage in an analogue delay line and a deconvolution filter. Data were transferred from the front-end chip using an analogue fibre optic link employing a novel reflective electro-optic modulator and continuous laser light source remote from the detector. This is the first time such a system has been used in an experimental environment and is the basis of the system proposed for the CMS experiment at LHC.

Published
1996
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3. Isotopic Composition of Light Nuclei in Cosmic Rays: Results from AMS-01

Author

H. T. Liu, J. Ulbricht, P. Extermann, H. Hofer, G. Ambrosi, U. Becker, E. Perrin, C. Sbarra, W. J. Burger, F. J. Eppling, P. H. Fisher, S. M. Ting, M. Kraeber, Rui Miguel Faisca Rodrigues Pereira, Veronica Bindi, T. Kirn, M. Paniccia, C. dela Guia, A. Klimentov, Adrian Biland, M.W. Lee, M. Pimenta, Jouko Ritakari, Hui Zhang, S. Schael, I. D'Antone, D. Rapin, Sadakazu Haino, J. Casaus, Massimo Gervasi, Jungwook Shin, V. Plyaskin, P. Azzarello, F. Mayet, A. Schultz von Dratzig, D. Grandi, Andrea Contin, J.V. Allaby, L. Djambazov, Andrei Kounine, P. G. Rancoita, M. Pohl, B. Bertucci, Xiao-Dong Tang, J. P. Vialle, W.Z. Zhu, M. Capell, R. Siedling, Shih-Chang Lee, H. Park, L. Ao, J. Engelberg, M. Jongmanns, R. Kossakowski, H. von Gunten, D. Crespo, J. D. Burger, K. Lübelsmeyer, J. Alcaraz, K. Karlamaa, Yun-Young Choi, S. X. Wu, Eun-Suk Seo, T. S. Dai, S. Xu, Dawei Zhao, Federico Cindolo, Z.R. Dong, V. Shoutko, Joachim Trümper, Maria Ionica, Guohuai Zhu, V. Commichau, Z.P. Zhang, E. Shoumilov, E. Riihonen, A. Mihul, G.P. Barreira, M. J. Boschini, M. Ribordy, Tengfei Song, H. Anderhub, M. Duranti, U. Roeser, T. Siedenburg, H.F. Chen, M. Steuer, C. Delgado, Mao-Zhi Yang, Zhenghao Xu, A. Lebedev, Dong-Chul Son, H. Suter, G.S. Sun, A. Bartoloni, V. Koutsenko, Eino Valtonen, W. Wallraff, P.C. Xia, F. Spada, P. Saouter, J. Favier, Z. L. Ren, Waclaw Karpinski, X. D. Cai, Changgen Yang, I. Vetlitsky, W.H. Park, E. Cortina-Gil, G. Bruni, F. Palmonari, A. Pevsner, D. Vité, M. Buénerd, Tzihong Chiueh, S. R. Ro, S. Natale, G. Laurenti, S. Waldmeier Wicki, E. P. Velikhov, B. Zimmermann, R. Becker, Y. Galaktionov, Roald Z. Sagdeev, Ciaran Williams, Merja Tornikoski, J.L. Yan, Markus Cristinziani, J. J. Torsti, Antonino Zichichi, L. Bellagamba, K.S. Kim, A. Arefiev, F. Barao, R. R. McNeil, Jing Wang, G. Sartorelli, Nicola Tomassetti, P. Cannarsa, Y. H. Chang, T. Eronen, G. Kenney, M. Aguilar, Felicitas Pauss, V. Hermel, Werner Lustermann, Behcet Alpat, M. Basile, Z.G. Chen, G. Flügge, G. N. Kim, F. Spinella, M. Bourquin, H. L. Zhuang, J. Yang, You Zhou, Nicolas Produit, D. Luckey, F. Vezzu, G. Lu, C. Maña, C.H. Lin, Samuel C.C. Ting, Fabrizio Giulio Luca Pilo, G. Castellini, J. Vandenhirtz, D. Casadei, G. Laborie, P. Giusti, S. Di Falco, O. Grimm, Paolo Zuccon, A. Hasan, Mauro Menichelli, F. Giovacchini, G. Schwering, Daijin Kim, W.Q. Gu, F. Zhou, N. Fouque, I. Cernuda, E. Fiandrini, H. S. Chen, D. Santos, S. Urpo, G. Viertel, Luísa Arruda, G. Lamanna, K. Hangarter, Lucio Quadrani, B. Verlaat, P. Berges, Ari Mujunen, K. Wiik, J. Berdugo, G. Boella, N.A. Chernoplekov, Anselmo Margotti, W. Hungerford, Timo Laitinen, M. Pauluzzi, D. Ren, Giuseppe Levi, Lu Yuzhang, LinLi Yan, A.I. Oliva, V. Pojidaev, C. Lechanoine-Leluc, S.W. Ye, Roberto Battiston, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), AMS, AGUILAR M., ALCARAZ J., ALLABY J., ALPAT B., AMBROSI G., ANDERHUB H., AO L., AREFIEV A., ARRUDA L., AZZARELLO P., BASILE M., BARAO F., BARREIRA G., BARTOLONI A., BATTISTON R., BECKER R., BECKER U., BELLAGAMBA L., BERDUGO J., BERGES P., BERTUCCI B., BILAND A., BINDI V., BOELLA G., BOSCHINI M., BOURQUIN M., BRUNI G., BUENERD M., BURGER JD., BURGER WJ., CAI XD., CANNARSA P., CAPELL M., CASADEI D., CASAUS J., CASTELLINI G., CERNUDA I., CHANG YH., CHEN HF., CHEN HS., CHEN ZG., CHERNOPLEKOV NA., CHIUEH TH., CHOI YY., CINDOLO F., COMMICHAU V., CONTIN A., CORTINA-GIL E., CRESPO D., CRISTINZIANI M., DAI TS., DELA GUIA C., DELGADO C., DI FALCO S., DJAMBAZOV L., D'ANTONE I., DONG ZR., DURANTI M., ENGELBERG J., EPPLING FJ., ERONEN T., EXTERMANN P., FAVIER J., FIANDRINI E., FISHER PH., FLUGGE G., FOUQUE N., GALAKTIONOV Y., GERVASI M., GIOVACCHINI F., GIUSTI P., GRANDI D., GRIMM O., GU WQ., HAINO S., HANGARTER K., HASAN A., HERMEL V., HOFER H., HUNGERFORD W., IONICA M., JONGMANNS M., KARLAMAA K., KARPINSKI W., KENNEY G., KIM DH., KIM GN., KIM KS., KIRN T., KLIMENTOV A., KOSSAKOWSKI R., KOUNINE A., KOUTSENKO V., KRAEBER M., LABORIE G., LAITINEN T., LAMANNA G., LAURENTI G., LEBEDEV A., LECHANOINE-LELUC C., LEE MW., LEE SC., LEVI G., LIN CH., LIU HT., LU G., LU YS., LUBELSMEYER K., LUCKEY D., LUSTERMANN W., MANA C., MARGOTTI A., MAYET F., MCNEIL RR., MENICHELLI M., MIHUL A., MUJUNEN A., NATALE S., OLIVA A., PALMONARI F., PANICCIA M., PARK HB., PARK WH., PAULUZZI M., PAUSS F., PEREIRA R., PERRIN E., PEVSNER A., PILO F., PIMENTA M., PLYASKIN V., POJIDAEV V., POHL M., PRODUIT N., QUADRANI L., RANCOITA PG., RAPIN D., REN D., REN Z., RIBORDY M., RIIHONEN E., RITAKARI J., RO S., ROESER U., SAGDEEV R., SANTOS D., SARTORELLI G., SAOUTER P., SBARRA C., SCHAEL S., VON DRATZIG AS., SCHWERING G., SEO ES., SHIN JW., SHOUMILOV E., SHOUTKO V., SIEDENBURG T., SIEDLING R., SON D., SONG T., SPADA FR., SPINELLA F., STEUER M., SUN GS., SUTER H., TANG XW., TING SCC., TING SM., TOMASSETTI N., TORNIKOSKI M., TORSTI J., TRUMPER J., ULBRICHT J., URPO S., VALTONEN E., VANDENHIRTZ J., VELIKHOV E., VERLAAT B., VETLITSKY I., VEZZU F., VIALLE JP., VIERTEL G., VITE D., VON GUNTEN H., WICKI SW., WALLRAFF W., WANG JZ., WIIK K., WILLIAMS C., WU SX., XIA PC., XU S., XU ZZ., YAN JL., YAN LG., YANG CG., YANG J., YANG M., YE SW., ZHANG HY., ZHANG ZP., ZHAO DX., ZHOU F., ZHOU Y., ZHU GY., ZHU WZ., ZHUANG HL., ZICHICHI A., ZIMMERMANN B., ZUCCON P, Aguilar, M, Alcaraz, J, Allaby, J, Alpat, B, Ambrosi, G, Anderhub, H, Ao, L, Arefiev, A, Arruda, L, Azzarello, P, Basile, M, Barao, F, Barreira, G, Bartoloni, A, Battiston, R, Becker, R, Becker, U, Bellagamba, L, Berdugo, J, Berges, P, Bertucci, B, Biland, A, Bindi, V, Boella, G, Boschini, M, Bourquin, M, Bruni, G, Buénerd, M, Burger, J, Burger, W, Cai, X, Cannarsa, P, Capell, M, Casadei, D, Casaus, J, Castellini, G, Cernuda, I, Chang, Y, Chen, H, Chen, Z, Chernoplekov, N, Chiueh, T, Choi, Y, Cindolo, F, Commichau, V, Contin, A, Cortina Gil, E, Crespo, D, Cristinziani, M, Dai, T, dela Guia, C, Delgado, C, Di Falco, S, Djambazov, L, D’Antone, I, Dong, Z, Duranti, M, Engelberg, J, Eppling, F, Eronen, T, Extermann, P, Favier, J, Fiandrini, E, Fisher, P, Flügge, G, Fouque, N, Galaktionov, Y, Gervasi, M, Giovacchini, F, Giusti, P, Grandi, D, Grimm, O, Gu, W, Haino, S, Hangarter, K, Hasan, A, Hermel, V, Hofer, H, Hungerford, W, Ionica, M, Jongmanns, M, Karlamaa, K, Karpinski, W, Kenney, G, Kim, D, Kim, G, Kim, K, Kirn, T, Klimentov, A, Kossakowski, R, Kounine, A, Koutsenko, V, Kraeber, M, Laborie, G, Laitinen, T, Lamanna, G, Laurenti, G, Lebedev, A, Lechanoine Leluc, C, Lee, M, Lee, S, Levi, G, Lin, C, Liu, H, Lu, G, Lu, Y, Lübelsmeyer, K, Luckey, D, Lustermann, W, Maña, C, Margotti, A, Mayet, F, Mcneil, R, Menichelli, M, Mihul, A, Mujunen, A, Natale, S, Oliva, A, Palmonari, F, Paniccia, M, Park, H, Park, W, Pauluzzi, M, Pauss, F, Pereira, R, Perrin, E, Pevsner, A, Pilo, F, Pimenta, M, Plyaskin, V, Pojidaev, V, Pohl, M, Produit, N, Quadrani, L, Rancoita, P, Rapin, D, Ren, D, Ren, Z, Ribordy, M, Riihonen, E, Ritakari, J, Ro, S, Roeser, U, Sagdeev, R, Santos, D, Sartorelli, G, Saouter, P, Sbarra, C, Schael, S, von Dratzig, A, Schwering, G, Seo, E, Shin, J, Shoumilov, E, Shoutko, V, Siedenburg, T, Siedling, R, Son, D, Song, T, Spada, F, Spinella, F, Steuer, M, Sun, G, Suter, H, Tang, X, Ting, S, Tomassetti, N, Tornikoski, M, Torsti, J, Trümper, J, Ulbricht, J, Urpo, S, Valtonen, E, Vandenhirtz, J, Velikhov, E, Verlaat, B, Vetlitsky, I, Vezzu, F, Vialle, J, Viertel, G, Vité, D, Von Gunten, H, Wicki, S, Wallraff, W, Wang, J, Wiik, K, Williams, C, Wu, S, Xia, P, Xu, S, Xu, Z, Yan, J, Yan, L, Yang, C, Yang, J, Yang, M, Ye, S, Zhang, H, Zhang, Z, Zhao, D, Zhou, F, Zhou, Y, Zhu, G, Zhu, W, Zhuang, H, Zichichi, A, Zimmermann, B, Zuccon, P, Massachusetts Institute of Technology. Department of Physics, Massachusetts Institute of Technology. Laboratory for Nuclear Science, Becker, R., Becker, Ulrich J., Berges, P., Burger, Joseph D., Cai, Xudong, Capell, Michael H., Dai, T. S., Eppling, Frederic J., Fisher, Peter H., Klimentov, A., Kounine, Andrei, Koutsenko, Vladimir, Lebedev, Alexei, Luckey, P. David, Jr., Shoutko, V., Siedenburg, T., Steuer, M., Ting, Samuel C. C., Wu. S. X., Xu, S., and Zhou, F.

Subjects
Nuclear reaction, Astrophysics and Astronomy, [PHYS.ASTR.HE]Physics [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE], genetic structures, Cosmic ray, Isotopes of boron, 01 natural sciences, High Energy Physics - Experiment, Nuclear physics, ACCELERATION OF PARTICLES, ABUNDANCES, Nucleosynthesis, 0103 physical sciences, Alpha Magnetic Spectrometer, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], acceleration of particles, cosmic rays, nuclear reactions, nucleosynthesis, abundances, 010303 astronomy & astrophysics, Cosmic ray spallation, Physics, NUCLEAR REACTIONS, NUCLEOSYNTHESIS, 010308 nuclear & particles physics, [SDU.ASTR.HE]Sciences of the Universe [physics]/Astrophysics [astro-ph]/High Energy Astrophysical Phenomena [astro-ph.HE], Astronomy and Astrophysics, COSMIC RAYS, FIS/01 - FISICA SPERIMENTALE, Space and Planetary Science, Isotopes of beryllium, Astrophysics - High Energy Astrophysical Phenomena, Heliosphere
Abstract

The variety of isotopes in cosmic rays allows us to study different aspects of the processes that cosmic rays undergo between the time they are produced and the time of their arrival in the heliosphere. In this paper, we present measurements of the isotopic ratios [superscript 2]H/[superscript 4]He, [superscript 3]He/[superscript 4]He, [superscript 6]Li/[superscript 7]Li, [superscript 7]Be/([superscript 9]Be+[superscript 10]Be), and [superscript 10]B/[superscript 11]B in the range 0.2-1.4 GeV of kinetic energy per nucleon. The measurements are based on the data collected by the Alpha Magnetic Spectrometer, AMS-01, during the STS-91 flight in 1998 June., United States. Dept. of Energy, Massachusetts Institute of Technology

Published
2011
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4. Capacitance measurements on silicon microstrip detectors

Author

D. Vité, A. Peisert, S. Masciocchi, R. Wheadon, and C. Ronqvist

Subjects
Physics, Nuclear and High Energy Physics, Large Hadron Collider, Silicon, Physics::Instrumentation and Detectors, business.industry, chemistry.chemical_element, Particle accelerator, Condensed Matter::Mesoscopic Systems and Quantum Hall Effect, Capacitance, Particle detector, Microstrip, Semiconductor detector, law.invention, Nuclear Energy and Engineering, chemistry, law, Optoelectronics, High Energy Physics::Experiment, Electrical and Electronic Engineering, business, Ohmic contact
Abstract

The results of capacitance measurements on both the junction and ohmic sides of detectors with various geometries are presented. Double-sided detectors with a second metal layer and different readout patterns are also studied. Measurements are presented of microstrip capacitance after irradiation with both neutrons and photons. These measurements are made as part of the research by the RD20 collaboration into all aspects of the use of silicon microstrips at the Large Hadron Collider at CERN. >

Published
1993
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5. Calculation of the geometrical capacitance of silicon microstrip structures using a variational approach

Author

G. Hall, D. Vité, and R. Wheadon

Subjects
Physics, Nuclear and High Energy Physics, Physics::Instrumentation and Detectors, Detector, Mathematical analysis, Charge density, Function (mathematics), STRIPS, Capacitance, Square (algebra), Microstrip, law.invention, law, Instrumentation, Diode
Abstract

A lower limit to the capacitance of strip-like detectors, for example microstrips, is set by the geometrical capacitance of the electrodes. It is important to estimate this accurately so that proper account can be taken of additional effects such as surface charge layers in the device. We present a method for the calculation of multi-strip structure capacitances based on a variational technique which avoids the need to solve Poisson's equation numerically in two dimensions for the structure in question. Instead, the solution is achieved starting from an approximate charge distribution function. This method is both simple to implement and efficient to run. Experimental results from two types of test device are presented and compared with the calculations. Firstly, microstrip structures were produced, varying both width and pitch. Secondly, 5 mm square diodes with their surfaces divided into connected strips have been produced with a range of different strip pitches.

Published
1993
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6. A study of the dimensional stability of the AMS silicon tracker

Author

Roberto Battiston, D. Vité, J. Alcaraz, M. Pauluzzi, J. Ulbricht, M. Bourquin, R. Ionica, M. Pohl, K. Lübelsmeyer, R. Siedling, Willemina Johanna Burger, D. Rapin, V. Shoutko, E. Babucci, P. Levtchenko, Philipp Azzarello, E. Perrin, A. Hasan, H. Hofer, Werner Lustermann, J. Vandenhirtz, W. Wallraff, Pierre Extermann, and G. Viertel

Subjects
Physics, Nuclear and High Energy Physics, Silicon, Spectrometer, business.industry, Detector, chemistry.chemical_element, Space Shuttle, Cosmic ray, ddc:500.2, Charged particle spectrometers, Metrology, Nuclear physics, Cosmic ray detectors, chemistry, Tracking and position-sensitive detectors, International Space Station, Alpha Magnetic Spectrometer, Aerospace engineering, business, Instrumentation
Abstract

The Alpha Magnetic Spectrometer (AMS) is designed as an independent module for installation on the International Space Station (ISS) for an operational period of 3 years. The AMS is the first cosmic ray spectrometer equipped with a large area silicon tracker . A preliminary version of the detector was flown on the NASA space shuttle Discovery during June 2–12, 1998. Results for the dimensional stability of the silicon tracker planes based on the flight data, and the metrology data recorded before and after the flight, are presented.

Published
2003

7. The Alpha Magnetic Spectrometer (AMS) on the International Space Station: Part I – results from the test flight on the space shuttle

Author

P. Extermann, H. Hofer, J.P. Richeux, Jose Maria Kenny, M. Jongmanns, H. Anderhub, P. Giusti, A. Hasan, Mauro Menichelli, G. Scolieri, Y.S. Lu, I. Lopes, S. Ro, G. Schwering, Eun-Suk Seo, L. Baldini, E. Lanciotti, F. Vezzu, Maria Ionica, S.W. Ye, V. Koutsenko, Eino Valtonen, M.Y. Kim, G. Sartorelli, D. Rapin, V. Plyaskin, Werner Lustermann, Behcet Alpat, W.Q. Gu, W.Z. Zhu, C. Delgado, E. Fiandrini, Yu. Galaktionov, D.H. Kim, J. Alcaraz, S. X. Wu, W.H. Park, Felicitas Pauss, B. Verlaat, P. Berges, K. Karlamaa, S.C.C. Ting, F. Palmonari, Zhenghao Xu, Zhuoxiang Ren, F. Velcea, Tzihong Chiueh, G. Barbier, H.B. Park, R. Kossakowski, A. Klimentov, S. Urpo, Ari Mujunen, A. Lebedev, Dong-Chul Son, G. Laurenti, K. Luebelsmeyer, E. Shoumilov, W. Hungerford, H. S. Chen, N. Produit, M. Buenerd, S. Waldmeier Wicki, M. Basile, E. Riihonen, A. Mihul, Timo Laitinen, J. Yang, V. Postolache, V. Pojidaev, M. Steuer, P.C. Xia, G.S. Sun, Jian Wang, M. Ribordy, K. Hangarter, H. L. Zhuang, M. Pauluzzi, Stefan Schael, H. Suter, Guohuai Zhu, G. Boella, X.W. Tang, M. Kraber, A. Pevsner, M. A. Huang, Mao-Zhi Yang, Tao Song, J.L. Yan, N.A. Chernoplekov, J. Vandenhirtz, Z.G. Chen, C. Camps, Ciaran Williams, D. Ren, D. Luckey, I. Vetlitsky, Samuel C.C. Ting, N. Dinu, Zhidong Zhang, Anselmo Margotti, E. Cortina-Gil, M. Bourquin, A. Papi, Adrian Biland, R. Ionica, L. Djambazov, Paolo Zuccon, A. Contin, I. D'Antone, M.W. Lee, Jungwook Shin, F. Barao, G. Castellini, J. P. Da Cunha, Gui Nyun Kim, N. Fouque, P. Levtchenko, Massimo Gervasi, Kyung-Suk Cho, J. D. Burger, F. Mayet, M. Pohl, P. Yeh, G. Lu, C. Maña, C. Lechanoine-Leluc, A. Schultz von Dratzig, C. Rossin, Hengchang Liu, A. Mourao, S. Blasko, G. Laborie, C. Sbarra, Peter H. Fisher, L.G. Yan, V. Hermel, J.D. Deus, X. D. Cai, M.J. Choi, O. Grimm, J. Casaus, M. Capell, Philipp Azzarello, R. Siedling, J. Berdugo, Yun Wang, A. Arefiev, Roald Z. Sagdeev, J. Engelberg, H. von Gunten, C.L. Liu, L. Bellagamba, Changgen Yang, D. Casadei, U. Roser, R. R. McNeil, B. Meillon, Giuseppe Levi, Y.L. Chuang, K. Wiik, P. Bene, Federico Cindolo, J. J. Torsti, Antonino Zichichi, L. Brocco, J. Ritakari, Y. H. Chang, G. Kenney, P. Cannarsa, Y.Y. Choi, D. Barancourt, J. Favier, Waclaw Karpinski, E. Babucci, U. Becker, Dawei Zhao, R. Becker, Z.R. Dong, E. Perrin, K.S. Kim, Claudia Cecchi, F. J. Eppling, M. Aguilar, V. Shoutko, S. Bizzaglia, G. Esposito, M. Pimenta, G. Fluegge, D. Grandi, B. Bertucci, D. Santos, G. Ambrosi, T. S. Dai, A. Pesci, B.C. Wang, D. Vité, G. Lamanna, G. Viertel, J. P. Vialle, H.F. Chen, G.P. Barreira, W. J. Burger, Frank Raupach, Roberto Battiston, L. Ao, J. Ulbricht, Hao Zhang, S.C. Lee, J. Trümper, P. Emonet, M. J. Boschini, V. Commichau, E. P. Velikhov, B. Zimmermann, Merja Tornikoski, Markus Cristinziani, T. Eronen, P. G. Rancoita, W. Wallraff, G. Bruni, Aguilar, M, Alcaraz, J, Allaby, J, Alpat, B, Ambrosi, G, Anderhub, H, Ao, L, Arefiev, A, Azzarello, P, Babucci, E, Baldini, L, Basile, M, Berdugo, J, Berges, P, Bertucci, B, Biland, A, Bizzaglia, S, Blasko, S, Boella, G, Boschini, M, Bourquin, M, Brocco, L, Bruni, G, Buenerd, M, Burger, J, Burger, W, Cai, X, Camps, C, Cannarsa, P, Capell, M, Casadei, D, Casaus, J, Castellini, G, Cecchi, C, Chang, Y, Chen, H, Chen, Z, Chernoplekov, N, Chiueh, T, Cho, K, Choi, M, Choi, Y, Chuang, Y, Cindolo, F, Commichau, V, Contin, A, Cortina-Gil, E, Cristinziani, M, da Cunha, J, Dai, T, Delgado, C, Deus, J, Dinu, N, Djambazov, L, D'Antone, I, Dong, Z, Emonet, P, Engelberg, J, Eppling, F, Eronen, T, Esposito, G, Extermann, P, Favier, J, Fiandrini, E, Fisher, P, Fluegge, G, Fouque, N, Galaktionov, Y, Gervasi, M, Giusti, P, Grandi, D, Grimms, O, Gu, W, Hangarter, K, Hasan, A, Hermel, V, Hofer, H, Huang, M, Hungerford, W, Ionica, M, Ionica, R, Jongmanns, M, Karlamaa, K, Karpinski, W, Kenney, G, Kenny, J, Kim, D, Kim, G, Kim, K, Kim, M, Klimentov, A, Kossakowski, R, Koutsenko, V, Kraeber, M, Laborie, G, Laitinen, T, Lamanna, G, Lanciotti, E, Laurenti, G, Lebedev, A, Lechanoine-Leluc, C, Lee, M, Lee, S, Levi, G, Levtchenko, P, Liu, C, Liu, H, Lopes, I, Lu, G, Lu, Y, Lubelsmeyer, K, Luckey, D, Lustermann, W, Mana, C, Margotti, A, Mayet, F, Mcneil, R, Meillon, B, Menichelli, M, Mihul, A, Mourao, A, Mujunen, A, Palmonari, F, Papi, A, Park, H, Park, W, Pauluzzi, M, Pauss, F, Perrin, E, Pesci, A, Pevsner, A, Pimenta, M, Plyaskin, V, Pojidaev, V, Pohl, M, Postolache, V, Produit, N, Rancoita, P, Rapin, D, Raupach, F, Ren, D, Ren, Z, Ribordy, M, Richeux, J, Riihonen, E, Ritakari, J, Ro, S, Roeser, U, Rossin, C, Sagdeev, R, Santos, D, Sartorelli, G, Sbarra, C, Schael, S, von Dratzig, A, Schwering, G, Scolieri, G, Seo, E, Shin, J, Shoutko, V, Shoumilov, E, Siedling, R, Son, D, Song, T, Steuer, M, Sun, G, Suter, H, Tang, X, Ting, S, Tornikoski, M, Torsti, J, Trumper, J, Ulbricht, J, Urpo, S, Valtonen, E, Vandenhirtz, J, Velcea, F, Velikhov, E, Verlaat, B, Vetlitsky, I, Vezzu, F, V, Jp, Viertel, G, Vite, D, Von Gunten, H, Wicki, S, Wallraff, W, Wang, B, Wang, J, Wang, Y, Wiik, K, Williams, C, Wu, S, Xia, P, Yan, J, Yan, L, Yang, C, Yang, J, Yang, M, Ye, S, Yeh, P, Xu, Z, Zhang, H, Zhang, Z, Zhao, D, Zhu, G, Zhu, W, Zhuang, H, Zichichi, A, Zimmermann, B, Zuccon, P, Ambrosi, Giovanni, Azzarello, Philipp, Bene, Pierre, Bourquin, Maurice, Cortina Gil, Eduardo, Cristinziani, Markus, Emonet, Pascal Philippe, Extermann, Pierre, Leluc, Catherine, Perrin, Eric, Pohl, Martin, Produit, Nicolas, Rapin, Divic Jean, Ribordy, Mathieu, Richeux, Jean-Pierre, Vite, Davide, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Joseph Fourier - Grenoble 1 (UJF)-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), AMS, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas, CIEMAT, E-28040, Madrid, Spain, and UCL - SST/IRMP - Institut de recherche en mathématique et physique

Subjects
Physics, 010308 nuclear & particles physics, FIS/06 - FISICA PER IL SISTEMA TERRA E PER IL MEZZO CIRCUMTERRESTRE, General Physics and Astronomy, chemistry.chemical_element, Electron, ddc:500.2, 01 natural sciences, Spectral line, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Nuclear physics, FIS/05 - ASTRONOMIA E ASTROFISICA, Positron, Earth's magnetic field, FIS/01 - FISICA SPERIMENTALE, chemistry, 13. Climate action, Antiproton, 0103 physical sciences, Alpha Magnetic Spectrometer, Nucleon, 010303 astronomy & astrophysics, AMS, Cosmic Rays, Antimatter, Helium, FIS/04 - FISICA NUCLEARE E SUBNUCLEARE
Abstract

The Alpha Magnetic Spectrometer (AMS) was flown on the space shuttle Discovery during flight STS-91 (June 1998) in a 51.7 deg orbit at altitudes between 320 and 390 km. A search for antihelium nuclei in the rigidity range 1–140 GV was performed. No antihelium nuclei were detected at any rigidity. An upper limit on the flux ratio of antihelium to helium of < 1.1×10^−6 was obtained. The high energy proton, electron, positron, helium, antiproton and deuterium spectra were accurately measured. For each particle and nuclei two distinct spectra were observed: a higher energy spectrum and a substantial second spectrum. Positrons in the second spectrum were found to be much more abundant than electrons. Tracing particles from the second spectra shows that most of them travel for an extended period of time in the geomagnetic field, and that the positive particles (p and e+) and negative ones (e−) originate from two complementary geographic regions. The second helium spectrum flux over the energy range 0.1–1.2 GeV/nucleon was measured to be (6.3 ± 0.9) × 10^−3(m^2 s sr)^−1. Over 90 percent of the helium flux was determined to be 3He at the 90% confidence level

Published
2002
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8. Cosmic protons

Author

J. Alcaraz, B. Alpat, G. Ambrosi, H. Anderhub, L. Ao, A. Arefiev, P. Azzarello, E. Babucci, L. Baldini, M. Basile, D. Barancourt, F. Barao, G. Barbier, G. Barreira, R. Battiston, R. Becker, U. Becker, L. Bellagamba, P. Béné, J. Berdugo, P. Berges, B. Bertucci, A. Biland, S. Bizzaglia, S. Blasko, G. Boella, M. Boschini, M. Bourquin, L. Brocco, G. Bruni, M. Buenerd, J.D. Burger, W.J. Burger, X.D. Cai, C. Camps, P. Cannarsa, M. Capell, D. Casadei, J. Casaus, G. Castellini, C. Cecchi, Y.H. Chang, H.F. Chen, H.S. Chen, Z.G. Chen, N.A. Chernoplekov, T.H. Chiueh, Y.L. Chuang, F. Cindolo, V. Commichau, A. Contin, P. Crespo, M. Cristinziani, J.P. da Cunha, T.S. Dai, J.D. Deus, N. Dinu, L. Djambazov, I. D'Antone, Z.R. Dong, P. Emonet, J. Engelberg, F.J. Eppling, T. Eronen, G. Esposito, P. Extermann, J. Favier, E. Fiandrini, P.H. Fisher, G. Fluegge, N. Fouque, Yu. Galaktionov, M. Gervasi, P. Giusti, D. Grandi, O. Grimm, W.Q. Gu, K. Hangarter, A. Hasan, V. Hermel, H. Hofer, M.A. Huang, W. Hungerford, M. Ionica, R. Ionica, M. Jongmanns, K. Karlamaa, W. Karpinski, G. Kenney, J. Kenny, W. Kim, A. Klimentov, R. Kossakowski, V. Koutsenko, M. Kraeber, G. Laborie, T. Laitinen, G. Lamanna, G. Laurenti, A. Lebedev, S.C. Lee, G. Levi, P. Levtchenko, C.L. Liu, H.T. Liu, I. Lopes, G. Lu, Y.S. Lu, K. Lübelsmeyer, D. Luckey, W. Lustermann, C. Maña, A. Margotti, F. Mayet, R.R. McNeil, B. Meillon, M. Menichelli, A. Mihul, A. Mourao, A. Mujunen, F. Palmonari, A. Papi, I.H. Park, M. Pauluzzi, F. Pauss, E. Perrin, A. Pesci, A. Pevsner, M. Pimenta, V. Plyaskin, V. Pojidaev, M. Pohl, V. Postolache, N. Produit, P.G. Rancoita, D. Rapin, F. Raupach, D. Ren, Z. Ren, M. Ribordy, J.P. Richeux, E. Riihonen, J. Ritakari, U. Roeser, C. Roissin, R. Sagdeev, G. Sartorelli, A. Schultz von Dratzig, G. Schwering, G. Scolieri, E.S. Seo, V. Shoutko, E. Shoumilov, R. Siedling, D. Son, T. Song, M. Steuer, G.S. Sun, H. Suter, X.W. Tang, Samuel C.C. Ting, S.M. Ting, M. Tornikoski, J. Torsti, J. Trümper, J. Ulbricht, S. Urpo, I. Usoskin, E. Valtonen, J. Vandenhirtz, F. Velcea, E. Velikhov, B. Verlaat, I. Vetlitsky, F. Vezzu, J.P. Vialle, G. Viertel, D. Vité, H. Von Gunten, S. Waldmeier Wicki, W. Wallraff, B.C. Wang, J.Z. Wang, Y.H. Wang, K. Wiik, C. Williams, S.X. Wu, P.C. Xia, J.L. Yan, L.G. Yan, C.G. Yang, M. Yang, S.W. Ye, P. Yeh, Z.Z. Xu, H.Y. Zhang, Z.P. Zhang, D.X. Zhao, G.Y. Zhu, W.Z. Zhu, H.L. Zhuang, A. Zichichi, B. Zimmermann, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), AMS, Alcaraz, J, Alpat, B, Ambrosi, G, Anderhub, H, Ao, L, Arefiev, A, Azzarello, P, Babucci, E, Baldini, L, Basile, M, Barancourt, D, Barao, F, Barbier, G, Barreira, G, Battiston, R, Becker, R, Becker, U, Bellagamba, L, Béné, P, Berdugo, J, Berges, P, Bertucci, B, Biland, A, Bizzaglia, S, Blasko, S, Boella, G, Boschini, M, Bourquin, M, Brocco, L, Bruni, G, Buenerd, M, Burger, J, Burger, W, Cai, X, Camps, C, Cannarsa, P, Capell, M, Casadei, D, Casaus, J, Castellini, G, Cecchi, C, Chang, Y, Chen, H, Chen, Z, Chernoplekov, N, Chiueh, T, Chuang, Y, Cindolo, F, Commichau, V, Contin, A, Crespo, P, Cristinziani, M, Cunha, J, Dai, T, Deus, J, Dinu, N, Djambazov, L, D'Antone, I, Dong, Z, Emonet, P, Engelberg, J, Eppling, F, Eronen, T, Esposito, G, Extermann, P, Favier, J, Fiandrini, E, Fisher, P, Fluegge, G, Fouque, N, Galaktionov, Y, Gervasi, M, Giusti, P, Grandi, D, Grimm, O, Gu, W, Hangarter, K, Hasan, A, Hermel, V, Hofer, H, Huang, M, Hungerford, W, Ionica, M, Ionica, R, Jongmanns, M, Karlamaa, K, Karpinski, W, Kenney, G, Kenny, J, Kim, W, Klimentov, A, Kossakowski, R, Koutsenko, V, Kraeber, M, Laborie, G, Laitinen, T, Lamanna, G, Laurenti, G, Lebedev, A, Lee, S, Levi, G, Levtchenko, P, Liu, C, Liu, H, Lopes, I, Lu, G, Lu, Y, Lübelsmeyer, K, Luckey, D, Lustermann, W, Maña, C, Margotti, A, Mayet, F, Mcneil, R, Meillon, B, Menichelli, M, Mihul, A, Mourao, A, Mujunen, A, Palmonari, F, Papi, A, Park, I, Pauluzzi, M, Pauss, F, Perrin, E, Pesci, A, Pevsner, A, Pimenta, M, Plyaskin, V, Pojidaev, V, Pohl, M, Postolache, V, Produit, N, Rancoita, P, Rapin, D, Raupach, F, Ren, D, Ren, Z, Ribordy, M, Richeux, J, Riihonen, E, Ritakari, J, Roeser, U, Roissin, C, Sagdeev, R, Sartorelli, G, Dratzig, A, Schwering, G, Scolieri, G, Seo, E, Shoutko, V, Shoumilov, E, Siedling, R, Son, D, Song, T, Steuer, M, Sun, G, Suter, H, Tang, X, Ting, S, Tornikoski, M, Torsti, J, Trümper, J, Ulbricht, J, Urpo, S, Usoskin, I, Valtonen, E, Vandenhirtz, J, Velcea, F, Velikhov, E, Verlaat, B, Vetlitsky, I, Vezzu, F, Vialle, J, Viertel, G, Vité, D, Gunten, H, Wicki, S, Wallraff, W, Wang, B, Wang, J, Wang, Y, Wiik, K, Williams, C, Wu, S, Xia, P, Yan, J, Yan, L, Yang, C, Yang, M, Ye, S, Yeh, P, Xu, Z, Zhang, H, Zhang, Z, Zhao, D, Zhu, G, Zhu, W, Zhuang, H, Zichichi, A, Zimmermann, B, Ambrosi, Giovanni, Azzarello, Philipp, Bene, Pierre, Bourquin, Maurice, Cristinziani, Markus, Emonet, Pascal Philippe, Extermann, Pierre, Perrin, Eric, Pohl, Martin, Produit, Nicolas, Rapin, Divic Jean, Ribordy, Mathieu, Richeux, Jean-Pierre, and Vite, Davide

Subjects
[PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Nuclear and High Energy Physics, FIS/05 - ASTRONOMIA E ASTROFISICA, Cosmic rays: protons, FIS/01 - FISICA SPERIMENTALE, 010308 nuclear & particles physics, 0103 physical sciences, ddc:500.2, Nuclear Experiment, 010303 astronomy & astrophysics, 01 natural sciences, FIS/04 - FISICA NUCLEARE E SUBNUCLEARE
Abstract

The primary proton spectrum in the kinetic energy range 0.2 to 200 GeV was measured by the Alpha Magnetic Spectrometer (AMS) during space shuttle flight STS–91 at an altitude of 380 km. The complete data set combining three shuttle attitudes and including all known systematic effects is presented.

Published
2001

9. Search for antihelium in cosmic rays

Author

Z.R. Dong, S. Bizzaglia, G. Ambrosi, J. Casaus, M. Pimenta, T. S. Dai, Samuel C.C. Ting, L. Djambazov, B.C. Wang, G. Molinari, A. Klimentov, B. Bertucci, S. X. Wu, R. Pilastrini, G. Lamanna, L.G. Yan, R. Siedling, J. Favier, Philipp Azzarello, J. J. Torsti, Antonino Zichichi, A. Hasan, Mauro Menichelli, L. Ao, Inkyu Park, J.P. Vialle, M. Steuer, P.C. Xia, Peter H. Fisher, Ilya Usoskin, P. G. Rancoita, Jing Wang, F. Palmonari, J. Isbert, M. Ribordy, G. Boella, H. von Gunten, P. Crespo, W. J. Burger, N. Fouque, R. Ionica, Federico Cindolo, J.P. Richeux, R. Cavalletti, D.X. Zhao, U. Roeser, N.A. Chernoplekov, C. G. Yang, Nicolas Produit, M. Buenerd, A. Cotta-Ramusino, R. Flaminio, J. P. Da Cunha, Anselmo Margotti, D. Rapin, V. Plyaskin, W. Kim, Roberto Battiston, G.Y. Zhu, W.Z. Zhu, G. Fluegge, G. Bruni, G. Viertel, P. Levtchenko, E. Fiandrini, G. Laurenti, K. Luebelsmeyer, S. Waldmeier Wicki, S.C. Lee, Yu. Galaktionov, F. Massera, D. Vité, J. Ulbricht, A. Chiarini, Hao Zhang, H. S. Chen, C. Rossin, G. Pancaldi, Felicitas Pauss, S. Recupero, Ciaran Williams, R. Kossakowski, W. Karpinski, J. Alcaraz, F. Barao, P. Yeh, E. Emonet, L.K. Ding, H.T. Liu, E. P. Velikhov, G. Torromeo, M. Basile, G.S. Sun, A. Pevsner, J.L. Yan, X. D. Cai, L. Baldini, F. Mezzanotte, C.L. Liu, L. Bellagamba, S. Blasko, K. Hangarter, J. Berdugo, Adrian Biland, G. Barbier, J. Vandenhirtz, V. Hermel, A. Arefiev, E. Prati, Jose Maria Kenny, R. R. McNeil, T.G. Guzik, B. Meillon, W.K. Gu, G. Kenney, I. D'Antone, J.P. Wefel, Markus Cristinziani, T. Eronen, R. Becker, Y.L. Chuang, P. Bene, B. Alpat, D. Luckey, E. Riihonen, A. Mihul, M. Jongmanns, C.C. Feng, D. Casadei, W. Wallraff, J. Krieger, H.L. Zhuang, G. Castellini, Massimo Gervasi, Zhuoxiang Ren, G. Schwering, W. Hungerford, A. Papi, Timo Laitinen, D. Santos, F. Tenbusch, B. Verlaat, P. Berges, Raffaele Mezzenga, S. Urpo, Ari Mujunen, G. Laborie, V. Shoutko, M. Pauluzzi, Y. S. Lu, G.P. Barreira, Yun Wang, V. Commichau, J. Truemper, A. Pesci, D. Ren, M. Capell, V. Koutsenko, Eino Valtonen, F. Vezzu, P. Cannarsa, C. Camps, T.P. Li, M. Ionica, H. Postema, A. Contin, M. Yang, E. Babucci, U. Becker, A. Lebedev, Dong-Chul Son, P. Giusti, I. Lopes, E. Perrin, F. J. Eppling, D. Alvisi, G. Lu, F. Raupach, C. Maña, P. Extermann, S. M. Ting, H. Hofer, G. Esposito, I. Vetlitsky, G. Sartorelli, M. Lolli, G. Maehlum, E.A. Werner, Fabio Finelli, Z.G. Chen, Werner Lustermann, Giuseppe Levi, X. W. Tang, Tao Song, M. Bourquin, V. Pojidaev, E. Shoumilov, H. Suter, J. D. Burger, Roald Z. Sagdeev, A. Mourao, J. Ritakari, Y. H. Chang, D. Barancourt, N. Dinu, H. Anderhub, Tzihong Chiueh, M. A. Huang, Jorge Dias de Deus, F. Mayet, A. Schultz von Dratzig, Alcaraz, J, Alvisi, D, Alpat, B, Ambrosi, G, Anderhub, H, Ao, L, Arefiev, A, Azzarello, P, Babucci, E, Baldini, L, Basile, M, Barancourt, D, Barao, F, Barbier, G, Barreira, G, Battiston, R, Becker, R, Becker, U, Bellagamba, L, Béné, P, Berdugo, J, Berges, P, Bertucci, B, Biland, A, Bizzaglia, S, Blasko, S, Boella, G, Bourquin, M, Bruni, G, Buenerd, M, Burger, J, Burger, W, Cai, X, Cavalletti, R, Camps, C, Cannarsa, P, Capell, M, Casadei, D, Casaus, J, Castellini, G, Chang, Y, Chen, H, Chen, Z, Chernoplekov, N, Chiarini, A, Chiueh, T, Chuang, Y, Cindolo, F, Commichau, V, Contin, A, Cotta Ramusino, A, Crespo, P, Cristinziani, M, Dacunha, J, Dai, T, Deus, J, Ding, L, Dinu, N, Djambazov, L, D'Antone, I, Dong, Z, Emonet, P, Eppling, F, Eronen, T, Esposito, G, Extermann, P, Favier, J, Feng, C, Fiandrini, E, Finelli, F, Fisher, P, Flaminio, R, Fluegge, G, Fouque, N, Galaktionov, Y, Gervasi, M, Giusti, P, Gu, W, Guzik, T, Hangarter, K, Hasan, A, Hermel, V, Hofer, H, Huang, M, Hungerford, W, Ionica, M, Ionica, R, Isbert, J, Jongmanns, M, Karpinski, W, Kenney, G, Kenny, J, Kim, W, Klimentov, A, Krieger, J, Kossakowski, R, Koutsenko, V, Laborie, G, Laitinen, T, Lamanna, G, Laurenti, G, Lebedev, A, Lee, S, Levi, G, Levtchenko, P, Li, T, Liu, C, Liu, H, Lolli, M, Lopes, I, Lu, G, Lu, Y, Lübelsmeyer, K, Luckey, D, Lustermann, W, Maehlum, G, Maña, C, Margotti, A, Massera, F, Mayet, F, Mcneil, R, Meillon, B, Menichelli, M, Mezzanotte, F, Mezzenga, R, Mihul, A, Molinari, G, Mourao, A, Mujunen, A, Palmonari, F, Pancaldi, G, Papi, A, Park, I, Pauluzzi, M, Pauss, F, Perrin, E, Pesci, A, Pevsner, A, Pilastrini, R, Pimenta, M, Plyaskin, V, Pojidaev, V, Postema, H, Prati, E, Produit, N, Rancoita, P, Rapin, D, Raupach, F, Recupero, S, Ren, D, Ren, Z, Ribordy, M, Richeux, J, Riihonen, E, Ritakari, J, Roeser, U, Roissin, C, Sagdeev, R, Santos, D, Sartorelli, G, Schultzvondratzig, A, Schwering, G, Shoutko, V, Shoumilov, E, Siedling, R, Son, D, Song, T, Steuer, M, Sun, G, Suter, H, Tang, X, Ting, S, Tenbusch, F, Torromeo, G, Torsti, J, Trümper, J, Ulbricht, J, Urpo, S, Usoskin, I, Valtonen, E, Vandenhirtz, J, Velikhov, E, Verlaat, B, Vetlitsky, I, Vezzu, F, Vialle, J, Viertel, G, Vité, D, Vongunten, H, Waldmeierwicki, S, Wallraff, W, Wang, B, Wang, J, Wang, Y, Wefel, J, Werner, E, Williams, C, Wu, S, Xia, P, Yan, J, Yan, L, Yang, C, Yang, M, Yeh, P, Zhang, H, Zhao, D, Zhu, G, Zhu, W, Zhuang, H, Zichichi, A, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), and AMS

Subjects
Astrophysics and Astronomy, Nuclear and High Energy Physics, FOS: Physical sciences, chemistry.chemical_element, Space Shuttle, Cosmic ray, Astrophysics, 7. Clean energy, 01 natural sciences, High Energy Physics - Experiment, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], High Energy Physics - Experiment (hep-ex), FIS/05 - ASTRONOMIA E ASTROFISICA, Rigidity (electromagnetism), 0103 physical sciences, Alpha Magnetic Spectrometer, 010306 general physics, Helium, Physics, 010308 nuclear & particles physics, Astrophysics (astro-ph), Astronomy, Flux ratio, FIS/01 - FISICA SPERIMENTALE, chemistry, Cosmic rays: anti-helium, FIS/04 - FISICA NUCLEARE E SUBNUCLEARE
Abstract

The Alpha Magnetic Spectrometer (AMS) was flown on the space shuttle Discovery during flight STS-91 in a 51.7 degree orbit at altitudes between 320 and 390 km. A total of 2.86 * 10^6 helium nuclei were observed in the rigidity range 1 to 140 GV. No antihelium nuclei were detected at any rigidity. An upper limit on the flux ratio of antihelium to helium of < 1.1 * 10^-6 is obtained., 18 pages, Latex, 9 .eps figures

Published
2000

10. High-precision tracking and charge selection with silicon strip detectors for relativistic ions

Author

Roberto Battiston, H. Sann, Adrian Biland, A. Chen, M. Pauluzzi, D. Ren, Nicolas Produit, Yuan-Hann Chang, W. Wallraff, Mauro Menichelli, D. Rapin, Maria Ionica, M. Bourquin, Willis Lin, Ionica R, G. Ambrosi, D. Vité, E. Fiandrini, D Schardt, M. Ribordy, C Balboni, S.R. Hou, Werner Lustermann, Behcet Alpat, W. J. Burger, Dinu N, K Sümmerer, G. Maehlum, P. Extermann, G. Viertel, and S.X Wu

Subjects
Elastic scattering, Physics, Nuclear and High Energy Physics, Silicon, Physics::Instrumentation and Detectors, Charge number, chemistry.chemical_element, Tracking (particle physics), Particle detector, Ion, Computational physics, Semiconductor detector, chemistry, Ionization, Atomic physics, Instrumentation
Abstract

High-precision tracking and charge selection with silicon strip detectors for relativistic ions has been investigated using a 12C beam of 1.5 GeV/u at GSI with prototype modules developed for the AMS tracker. The ionization energy loss is measured and compared to the Landau}Vavilov theory for ions of charge number up to Z"6. The linearity in Z2 is examined. The capability to distinguish di!erent Z values based on the ionization energy loss is evaluated. The spatial resolution of the silicon strip detectors is investigated for carbon ions. The angular distribution of multiple Coulomb scattering is studied with lead absorbers. The results are compared to the Molie' re theory and the Gaussian approxima- tion of GEANT calculations. ( 2000 Published by Elsevier Science B.V. All rights reserved.

Published
2000

11. Leptons in near earth orbit

Author

L. Djambazov, P. Giusti, G. Scolieri, I. Lopes, Dawei Zhao, P. G. Rancoita, E. Babucci, U. Becker, F. Vezzu, E. Perrin, F. J. Eppling, G. Barbier, S. M. Ting, S.C. Lee, R. Ionica, F. Palmonari, H. von Gunten, G. Esposito, Z.R. Dong, Federico Cindolo, Changgen Yang, H. T. Liu, Diego Casadei, Yu. Galaktionov, D. Vité, A. Lebedev, U. Roeser, G. Castellini, Dong-Chul Son, Z. L. Ren, J. Alcaraz, Guohuai Zhu, Yun Wang, S. Bizzaglia, A. Arefiev, P. Extermann, H. Hofer, W. Wallraff, Ilya Usoskin, Jing Wang, P. Levtchenko, P. Emonet, T. S. Dai, H. Anderhub, Waclaw Karpinski, E. Fiandrini, R. Becker, P. Cannarsa, R. R. McNeil, D. Rapin, C. Roissin, B.C. Wang, M. Pimenta, E. P. Velikhov, B. Zimmermann, V. Plyaskin, Roald Z. Sagdeev, B. Meillon, H. S. Chen, L. Baldini, J. Casaus, A. Hasan, E. Riihonen, Mauro Menichelli, K. Karlamaa, A. Mihul, Giovanna Bruni, G. Kenney, N. Produit, D. Grandi, M. Ribordy, S. Urpo, W. J. Burger, Merja Tornikoski, Markus Cristinziani, G. Schwering, A. Pesci, I. Vetlitsky, L.G. Yan, I. D'Antone, Y. H. Chang, Tengfei Song, W.Q. Gu, B. Bertucci, D. Barancourt, N. Dinu, V. Commichau, G. Laborie, P. Crespo, Mao-Zhi Yang, J. J. Torsti, M. Jongmanns, Antonino Zichichi, Adrian Biland, V. Postolache, Peter H. Fisher, T. Eronen, C. Camps, J. Berdugo, N. Fouque, J. P. Da Cunha, Massimo Gervasi, J. Vandenhirtz, H. F. Chen, F. Barao, S. Blasko, Zhenyu Zhang, H.L. Zhuang, G. Viertel, E. Shoumilov, Jose Maria Kenny, W. Hungerford, F. Velcea, Y.L. Chuang, O. Grimm, J.L. Yan, K. Wiik, P. Bene, H. Suter, J.P. Richeux, Tzihong Chiueh, V. Hermel, M. Buenerd, Timo Laitinen, M. Capell, A. Papi, Eun-Suk Seo, M. Pauluzzi, R. Siedling, G. Fluegge, W.Z. Zhu, Giovanni Ambrosi, L. Ao, M. Bourquin, D. Ren, G. Lu, C. Maña, V. Koutsenko, Eino Valtonen, Felicitas Pauss, R. Kossakowski, A. Klimentov, G.S. Sun, A. Contin, Samuel C.C. Ting, M. A. Huang, M. J. Boschini, M. Basile, K. Hangarter, Roberto Battiston, A. Pevsner, D. Luckey, F. Mayet, Ciaran Williams, J. Ulbricht, A. Schultz von Dratzig, P. Yeh, G. Laurenti, Claudia Cecchi, S. Waldmeier Wicki, Hao Zhang, Z.G. Chen, S. X. Wu, J. Ritakari, X. D. Cai, J. Trümper, V. Shoutko, Inkyu Park, M. Steuer, P.C. Xia, S.W. Ye, C.L. Liu, L. Bellagamba, G. Lamanna, J. Engelberg, Xiao-Dong Tang, J. P. Vialle, K. Lübelsmeyer, G.P. Barreira, M. Ionica, P. Azzarello, Z. Z. Xu, V. Pojidaev, B. Verlaat, G. Sartorelli, P. Berges, Giuseppe Levi, Lu Yuzhang, Ari Mujunen, Werner Lustermann, Behcet Alpat, J. D. Burger, Frank Raupach, A. Mourao, J.D. Deus, L. Brocco, G. Boella, N.A. Chernoplekov, Anselmo Margotti, W. Kim, M. Kraeber, J. Favier, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), AMS, Alcaraz, J, Alpat, B, Ambrosi, G, Anderhub, H, Ao, L, Arefiev, A, Azzarello, P, Babucci, E, Baldini, L, Basile, M, Barancourt, D, Barao, F, Barbier, G, Barreira, G, Battiston, R, Becker, R, Becker, U, Bellagamba, L, Béné, P, Berdugo, J, Berges, P, Bertucci, B, Biland, A, Bizzaglia, S, Blasko, S, Boella, G, Boschini, M, Bourquin, M, Brocco, L, Bruni, G, Buenerd, M, Burger, J, Burger, W, Cai, X, Camps, C, Cannarsa, P, Capell, M, Casadei, D, Casaus, J, Castellini, G, Cecchi, C, Chang, Y, Chen, H, Chen, Z, Chernoplekov, N, Chiueh, T, Chuang, Y, Cindolo, F, Commichau, V, Contin, A, Crespo, P, Cristinziani, M, Cunha, J, Dai, T, Deus, J, Dinu, N, Djambazov, L, D'Antone, I, Dong, Z, Emonet, P, Engelberg, J, Eppling, F, Eronen, T, Esposito, G, Extermann, P, Favier, J, Fiandrini, E, Fisher, P, Fluegge, G, Fouque, N, Galaktionov, Y, Gervasi, M, Giusti, P, Grandi, D, Grimm, O, Gu, W, Hangarter, K, Hasan, A, Hermel, V, Hofer, H, Huang, M, Hungerford, W, Ionica, M, Ionica, R, Jongmanns, M, Karlamaa, K, Karpinski, W, Kenney, G, Kenny, J, Kim, W, Klimentov, A, Kossakowski, R, Koutsenko, V, Kraeber, M, Laborie, G, Laitinen, T, Lamanna, G, Laurenti, G, Lebedev, A, Lee, S, Levi, G, Levtchenko, P, Liu, C, Liu, H, Lopes, I, Lu, G, Lu, Y, Lübelsmeyer, K, Luckey, D, Lustermann, W, Maña, C, Margotti, A, Mayet, F, Mcneil, R, Meillon, B, Menichelli, M, Mihul, A, Mourao, A, Mujunen, A, Palmonari, F, Papi, A, Park, I, Pauluzzi, M, Pauss, F, Perrin, E, Pesci, A, Pevsner, A, Pimenta, M, Plyaskin, V, Pojidaev, V, Postolache, V, Produit, N, Rancoita, P, Rapin, D, Raupach, F, Ren, D, Ren, Z, Ribordy, M, Richeux, J, Riihonen, E, Ritakari, J, Roeser, U, Roissin, C, Sagdeev, R, Sartorelli, G, Dratzig, A, Schwering, G, Scolieri, G, Seo, E, Shoutko, V, Shoumilov, E, Siedling, R, Son, D, Song, T, Steuer, M, Sun, G, Suter, H, Tang, X, Ting, S, Tornikoski, M, Torsti, J, Trümper, J, Ulbricht, J, Urpo, S, Usoskin, I, Valtonen, E, Vandenhirtz, J, Velcea, F, Velikhov, E, Verlaat, B, Vetlitsky, I, Vezzu, F, Vialle, J, Viertel, G, Vité, D, Gunten, H, Wicki, S, Wallraff, W, Wang, B, Wang, J, Wang, Y, Wiik, K, Williams, C, Wu, S, Xia, P, Yan, J, Yan, L, Yang, C, Yang, M, Ye, S, Yeh, P, Xu, Z, Zhang, H, Zhang, Z, Zhao, D, Zhu, G, Zhu, W, Zhuang, H, Zichichi, A, and Zimmermann, B

Subjects
Nuclear and High Energy Physics, Cosmic Rays, AMS, Cosmic ray, Electron, Astrophysics, Kinetic energy, 01 natural sciences, Spectral line, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], Nuclear physics, FIS/05 - ASTRONOMIA E ASTROFISICA, AMS-01, 0103 physical sciences, Alpha Magnetic Spectrometer, AMS, 010306 general physics, 010303 astronomy & astrophysics, Physics, Earth's orbit, Cosmic rays: leptons, Cosmic Rays, cosmic rays, AMS-01, FIS/01 - FISICA SPERIMENTALE, Earth's magnetic field, 13. Climate action, High Energy Physics::Experiment, FIS/04 - FISICA NUCLEARE E SUBNUCLEARE, Lepton
Abstract

The lepton spectra in the kinetic energy ranges 0.2 to 40 GeV for e − and 0.2 to 3 GeV for e + were measured by the Alpha Magnetic Spectrometer (AMS) during space shuttle flight STS–91 at altitudes near 380 km. From the origin of the leptons two distinct spectra were observed: a higher energy spectrum and a substantial second spectrum with positrons much more abundant than electrons. Tracing leptons from the second spectra shows that most of these leptons travel for an extended period of time in the geomagnetic field and that the e + and e − originate from two complementary geographic regions.

Published
2000

12. Helium in near earth orbit

Author

D. Vité, Peter H. Fisher, Yu. Galaktionov, J. Alcaraz, Roald Z. Sagdeev, D.X. Zhao, K. Karlamaa, A. Arefiev, S.W. Ye, E. Riihonen, W. Hungerford, M. A. Huang, R. R. McNeil, B. Meillon, V. Shoutko, G. Kenney, J. Ritakari, Y. H. Chang, J. Engelberg, C. Camps, G. Sartorelli, D. Barancourt, A. Mihul, Timo Laitinen, R. Ionica, Jorge Dias de Deus, W. Kim, H. von Gunten, P. G. Rancoita, V. Postolache, M. Pauluzzi, G. Lu, C. Maña, Werner Lustermann, Federico Cindolo, F. Mayet, G. Fluegge, Mao-Zhi Yang, D. Ren, A. Schultz von Dratzig, G. Barbier, W.Z. Zhu, W. J. Burger, A. Papi, J. Casaus, U. Roeser, M. Ribordy, G. Ambrosi, Y.L. Chuang, A. Contin, P. Levtchenko, M. Buenerd, X.W. Tang, M. Pimenta, W. Wallraff, T. S. Dai, F. Vezzu, B. Verlaat, Maria Ionica, G.S. Sun, Samuel C.C. Ting, Frank Raupach, E. Shoumilov, P. Berges, B.C. Wang, S. Urpo, Ari Mujunen, G. Bruni, H. Suter, P. Bene, Hengchang Liu, D. Rapin, C. Roissin, V. Plyaskin, G. Laurenti, S. Waldmeier Wicki, D. Grandi, A. Pevsner, Z. L. Ren, F. Velcea, Tao Song, G. Lamanna, M. J. Boschini, B. Bertucci, J. J. Torsti, Antonino Zichichi, Waclaw Karpinski, J. Berdugo, H. Anderhub, V. Commichau, R. Becker, Roberto Battiston, B. Alpat, N. Fouque, J.P. Richeux, Zhenghao Xu, M. Bourquin, A. Lebedev, Dong-Chul Son, E. Fiandrini, F. Palmonari, Yun Wang, G. Boella, P. Yeh, J.L. Yan, H.F. Chen, L. Brocco, Felicitas Pauss, L. Baldini, A. Pesci, H. S. Chen, J. Ulbricht, K. Wiik, R. Kossakowski, N.A. Chernoplekov, Nicolas Produit, K. Lübelsmeyer, S. X. Wu, M. Basile, P. Cannarsa, Hao Zhang, S. Blasko, M. Jongmanns, G. Castellini, E. P. Velikhov, B. Zimmermann, G.P. Barreira, K. Hangarter, H. L. Zhuang, Anselmo Margotti, Tzihong Chiueh, J. P. Da Cunha, Y.S. Lu, Inkyu Park, J.P. Vialle, Ciaran Williams, A. Klimentov, G. Laborie, L. Ao, M. Pohl, N. Dinu, Merja Tornikoski, Markus Cristinziani, M. Steuer, P.C. Xia, G. Viertel, D. Luckey, Jose Maria Kenny, J. Trümper, L. Djambazov, Paolo Zuccon, O. Grimm, T. Eronen, E. Babucci, U. Becker, I. Vetlitsky, S.C. Lee, Eun-Suk Seo, E. Perrin, M. Kraeber, F. J. Eppling, S. M. Ting, Changgen Yang, V. Koutsenko, Eino Valtonen, P. Giusti, Adrian Biland, G. Scolieri, G. Esposito, Z.R. Dong, Claudia Cecchi, Philipp Azzarello, I. Lopes, Massimo Gervasi, P. Emonet, S. Bizzaglia, Z.G. Chen, J. Favier, M. Capell, R. Siedling, X. D. Cai, C.L. Liu, L. Bellagamba, L.G. Yan, Ilya Usoskin, Jing Wang, J. Vandenhirtz, A. Hasan, Mauro Menichelli, G. Schwering, P. Extermann, W.Q. Gu, H. Hofer, F. Barao, V. Hermel, Zhidong Zhang, D. Casadei, I. D'Antone, Guohuai Zhu, J. D. Burger, A. Mourao, V. Pojidaev, Giuseppe Levi, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), AMS, Alcaraz, J, Alpat, B, Ambrosi, G, Anderhub, H, Ao, L, Arefiev, A, Azzarello, P, Babucci, E, Baldini, L, Basile, M, Barancourt, D, Barao, F, Barbier, G, Barreira, G, Battiston, R, Becker, R, Becker, U, Bellagamba, L, Béné, P, Berdugo, J, Berges, P, Bertucci, B, Biland, A, Bizzaglia, S, Blasko, S, Boella, G, Boschini, M, Bourquin, M, Brocco, L, Bruni, G, Buenerd, M, Burger, J, Burger, W, Cai, X, Camps, C, Cannarsa, P, Capell, M, Casadei, D, Casaus, J, Castellini, G, Cecchi, C, Chang, Y, Chen, H, Chen, Z, Chernoplekov, N, Chiueh, T, Chuang, Y, Cindolo, F, Commichau, V, Contin, A, Cristinziani, M, Cunha, J, Dai, T, Deus, J, Dinu, N, Djambazov, L, D'Antone, I, Dong, Z, Emonet, P, Engelberg, J, Eppling, F, Eronen, T, Esposito, G, Extermann, P, Favier, J, Fiandrini, E, Fisher, P, Fluegge, G, Fouque, N, Galaktionov, Y, Gervasi, M, Giusti, P, Grandi, D, Grimm, O, Gu, W, Hangarter, K, Hasan, A, Hermel, V, Hofer, H, Huang, M, Hungerford, W, Ionica, M, Ionica, R, Jongmanns, M, Karlamaa, K, Karpinski, W, Kenney, G, Kenny, J, Kim, W, Klimentov, A, Kossakowski, R, Koutsenko, V, Kraeber, M, Laborie, G, Laitinen, T, Lamanna, G, Laurenti, G, Lebedev, A, Lee, S, Levi, G, Levtchenko, P, Liu, C, Liu, H, Lopes, I, Lu, G, Lu, Y, Lübelsmeyer, K, Luckey, D, Lustermann, W, Maña, C, Margotti, A, Mayet, F, Mcneil, R, Meillon, B, Menichelli, M, Mihul, A, Mourao, A, Mujunen, A, Palmonari, F, Papi, A, Park, I, Pauluzzi, M, Pauss, F, Perrin, E, Pesci, A, Pevsner, A, Pimenta, M, Plyaskin, V, Pojidaev, V, Pohl, M, Postolache, V, Produit, N, Rancoita, P, Rapin, D, Raupach, F, Ren, D, Ren, Z, Ribordy, M, Richeux, J, Riihonen, E, Ritakari, J, Roeser, U, Roissin, C, Sagdeev, R, Sartorelli, G, Schultz&nbsp, von&nbsp, Dratzig, A, Schwering, G, Scolieri, G, Seo, E, Shoutko, V, Shoumilov, E, Siedling, R, Son, D, Song, T, Steuer, M, Sun, G, Suter, H, Tang, X, Ting, S, Tornikoski, M, Torsti, J, Trümper, J, Ulbricht, J, Urpo, S, Usoskin, I, Valtonen, E, Vandenhirtz, J, Velcea, F, Velikhov, E, Verlaat, B, Vetlitsky, I, Vezzu, F, Vialle, J, Viertel, G, Vité, D, Gunten, H, Wicki, S, Wallraff, W, Wang, B, Wang, J, Wang, Y, Wiik, K, Williams, C, Wu, S, Xia, P, Yan, J, Yan, L, Yang, C, Yang, M, Ye, S, Yeh, P, Xu, Z, Zhang, H, Zhang, Z, Zhao, D, Zhu, G, Zhu, W, Zhuang, H, Zichichi, A, Zimmermann, B, Zuccon, P, Ambrosi, Giovanni, Azzarello, Philipp, Bene, Pierre, Bourquin, Maurice, Cristinziani, Markus, Emonet, Pascal Philippe, Extermann, Pierre, Perrin, Eric, Pohl, Martin, Produit, Nicolas, Rapin, Divic Jean, Ribordy, Mathieu, Richeux, Jean-Pierre, and Vite, Davide

Subjects
Physics, Nuclear and High Energy Physics, Earth's orbit, Range (particle radiation), 010308 nuclear & particles physics, chemistry.chemical_element, Flux, ddc:500.2, 01 natural sciences, Spectral line, Nuclear physics, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], FIS/05 - ASTRONOMIA E ASTROFISICA, FIS/01 - FISICA SPERIMENTALE, Earth's magnetic field, chemistry, 0103 physical sciences, Alpha Magnetic Spectrometer, Atomic physics, Cosmic rays: helium, Nuclear Experiment, Nucleon, 010303 astronomy & astrophysics, FIS/04 - FISICA NUCLEARE E SUBNUCLEARE, Helium
Abstract

The helium spectrum from 0.1 to 100 GeV/nucleon was measured by the Alpha Magnetic Spectrometer (AMS) during space shuttle flight STS-91 at altitudes near 380 km. Above the geomagnetic cutoff the spectrum is parameterized by a power law. Below the geomagnetic cutoff a second helium spectrum was observed. In the second helium spectra over the energy range 0.1 to 1.2 GeV/nucleon the flux was measured to be (6.3±0.9)×10 −3 ( m 2 sec sr ) −1 and more than ninety percent of the helium was determined to be 3He (at the 90% CL). Tracing helium from the second spectrum shows that about half of the 3He travel for an extended period of time in the geomagnetic field and that they originate from restricted geographic regions similar to protons and positrons.

Published
2000

13. Protons in near earth orbit

Author

J. Alcaraz, D. Alvisi, B. Alpat, G. Ambrosi, H. Anderhub, L. Ao, A. Arefiev, P. Azzarello, E. Babucci, L. Baldini, M. Basile, D. Barancourt, F. Barao, G. Barbier, G. Barreira, R. Battiston, R. Becker, U. Becker, L. Bellagamba, P. Béné, J. Berdugo, P. Berges, B. Bertucci, A. Biland, S. Bizzaglia, S. Blasko, G. Boella, M. Boschini, M. Bourquin, G. Bruni, M. Buenerd, J.D. Burger, W.J. Burger, X.D. Cai, R. Cavalletti, C. Camps, P. Cannarsa, M. Capell, D. Casadei, J. Casaus, G. Castellini, Y.H. Chang, H.F. Chen, H.S. Chen, Z.G. Chen, N.A. Chernoplekov, A. Chiarini, T.H. Chiueh, Y.L. Chuang, F. Cindolo, V. Commichau, A. Contin, A. Cotta–Ramusino, P. Crespo, M. Cristinziani, J.P. da Cunha, T.S. Dai, J.D. Deus, N. Dinu, L. Djambazov, I. D'Antone, Z.R. Dong, P. Emonet, J. Engelberg, F.J. Eppling, T. Eronen, G. Esposito, P. Extermann, J. Favier, C.C. Feng, E. Fiandrini, F. Finelli, P.H. Fisher, R. Flaminio, G. Fluegge, N. Fouque, Yu. Galaktionov, M. Gervasi, P. Giusti, D. Grandi, W.Q. Gu, K. Hangarter, A. Hasan, V. Hermel, H. Hofer, M.A. Huang, W. Hungerford, M. Ionica, R. Ionica, M. Jongmanns, K. Karlamaa, W. Karpinski, G. Kenney, J. Kenny, W. Kim, A. Klimentov, R. Kossakowski, V. Koutsenko, G. Laborie, T. Laitinen, G. Lamanna, G. Laurenti, A. Lebedev, S.C. Lee, G. Levi, P. Levtchenko, C.L. Liu, H.T. Liu, M. Lolli, I. Lopes, G. Lu, Y.S. Lu, K. Lübelsmeyer, D. Luckey, W. Lustermann, C. Maña, A. Margotti, F. Massera, F. Mayet, R.R. McNeil, B. Meillon, M. Menichelli, F. Mezzanotte, R. Mezzenga, A. Mihul, G. Molinari, A. Mourao, A. Mujunen, F. Palmonari, G. Pancaldi, A. Papi, I.H. Park, M. Pauluzzi, F. Pauss, E. Perrin, A. Pesci, A. Pevsner, R. Pilastrini, M. Pimenta, V. Plyaskin, V. Pojidaev, H. Postema, V. Postolache, E. Prati, N. Produit, P.G. Rancoita, D. Rapin, F. Raupach, S. Recupero, D. Ren, Z. Ren, M. Ribordy, J.P. Richeux, E. Riihonen, J. Ritakari, U. Roeser, C. Roissin, R. Sagdeev, D. Santos, G. Sartorelli, A. Schultz von Dratzig, G. Schwering, E.S. Seo, V. Shoutko, E. Shoumilov, R. Siedling, D. Son, T. Song, M. Steuer, G.S. Sun, H. Suter, X.W. Tang, Samuel C.C. Ting, S.M. Ting, M. Tornikoski, G. Torromeo, J. Torsti, J. Trümper, J. Ulbricht, S. Urpo, I. Usoskin, E. Valtonen, J. Vandenhirtz, F. Velcea, E. Velikhov, B. Verlaat, I. Vetlitsky, F. Vezzu, J.P. Vialle, G. Viertel, D. Vité, H. Von Gunten, S. Waldmeier Wicki, W. Wallraff, B.C. Wang, J.Z. Wang, Y.H. Wang, K. Wiik, C. Williams, S.X. Wu, P.C. Xia, J.L. Yan, L.G. Yan, C.G. Yang, M. Yang, S.W. Ye, P. Yeh, Z.Z. Xu, H.Y. Zhang, Z.P. Zhang, D.X. Zhao, G.Y. Zhu, W.Z. Zhu, H.L. Zhuang, A. Zichichi, Laboratoire de Physique Subatomique et de Cosmologie (LPSC), Université Joseph Fourier - Grenoble 1 (UJF)-Institut polytechnique de Grenoble - Grenoble Institute of Technology (Grenoble INP )-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Institut Polytechnique de Grenoble - Grenoble Institute of Technology-Centre National de la Recherche Scientifique (CNRS), Laboratoire d'Annecy de Physique des Particules (LAPP), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Centre National de la Recherche Scientifique (CNRS), AMS, Alcaraz, J, Alvisi, D, Alpat, B, Ambrosi, G, Anderhub, H, Ao, L, Arefiev, A, Azzarello, P, Babucci, E, Baldini, L, Basile, M, Barancourt, D, Barao, F, Barbier, G, Barreira, G, Battiston, R, Becker, R, Becker, U, Bellagamba, L, Béné, P, Berdugo, J, Berges, P, Bertucci, B, Biland, A, Bizzaglia, S, Blasko, S, Boella, G, Boschini, M, Bourquin, M, Bruni, G, Buenerd, M, Burger, J, Burger, W, Cai, X, Cavalletti, R, Camps, C, Cannarsa, P, Capell, M, Casadei, D, Casaus, J, Castellini, G, Chang, Y, Chen, H, Chen, Z, Chernoplekov, N, Chiarini, A, Chiueh, T, Chuang, Y, Cindolo, F, Commichau, V, Contin, A, Cotta–ramusino, A, Crespo, P, Cristinziani, M, Cunha, J, Dai, T, Deus, J, Dinu, N, Djambazov, L, D'Antone, I, Dong, Z, Emonet, P, Engelberg, J, Eppling, F, Eronen, T, Esposito, G, Extermann, P, Favier, J, Feng, C, Fiandrini, E, Finelli, F, Fisher, P, Flaminio, R, Fluegge, G, Fouque, N, Galaktionov, Y, Gervasi, M, Giusti, P, Grandi, D, Gu, W, Hangarter, K, Hasan, A, Hermel, V, Hofer, H, Huang, M, Hungerford, W, Ionica, M, Ionica, R, Jongmanns, M, Karlamaa, K, Karpinski, W, Kenney, G, Kenny, J, Kim, W, Klimentov, A, Kossakowski, R, Koutsenko, V, Laborie, G, Laitinen, T, Lamanna, G, Laurenti, G, Lebedev, A, Lee, S, Levi, G, Levtchenko, P, Liu, C, Liu, H, Lolli, M, Lopes, I, Lu, G, Lu, Y, Lübelsmeyer, K, Luckey, D, Lustermann, W, Maña, C, Margotti, A, Massera, F, Mayet, F, Mcneil, R, Meillon, B, Menichelli, M, Mezzanotte, F, Mezzenga, R, Mihul, A, Molinari, G, Mourao, A, Mujunen, A, Palmonari, F, Pancaldi, G, Papi, A, Park, I, Pauluzzi, M, Pauss, F, Perrin, E, Pesci, A, Pevsner, A, Pilastrini, R, Pimenta, M, Plyaskin, V, Pojidaev, V, Postema, H, Postolache, V, Prati, E, Produit, N, Rancoita, P, Rapin, D, Raupach, F, Recupero, S, Ren, D, Ren, Z, Ribordy, M, Richeux, J, Riihonen, E, Ritakari, J, Roeser, U, Roissin, C, Sagdeev, R, Santos, D, Sartorelli, G, Dratzig, A, Schwering, G, Seo, E, Shoutko, V, Shoumilov, E, Siedling, R, Son, D, Song, T, Steuer, M, Sun, G, Suter, H, Tang, X, Ting, S, Tornikoski, M, Torromeo, G, Torsti, J, Trümper, J, Ulbricht, J, Urpo, S, Usoskin, I, Valtonen, E, Vandenhirtz, J, Velcea, F, Velikhov, E, Verlaat, B, Vetlitsky, I, Vezzu, F, Vialle, J, Viertel, G, Vité, D, Gunten, H, Wicki, S, Wallraff, W, Wang, B, Wang, J, Wang, Y, Wiik, K, Williams, C, Wu, S, Xia, P, Yan, J, Yan, L, Yang, C, Yang, M, Ye, S, Yeh, P, Xu, Z, Zhang, H, Zhang, Z, Zhao, D, Zhu, G, Zhu, W, Zhuang, H, and Zichichi, A

Subjects
Nuclear and High Energy Physics, Astrophysics and Astronomy, Proton, FOS: Physical sciences, Flux, Space Shuttle, Astrophysics, Kinetic energy, 7. Clean energy, 01 natural sciences, High Energy Physics - Experiment, [PHYS.ASTR.CO]Physics [physics]/Astrophysics [astro-ph]/Cosmology and Extra-Galactic Astrophysics [astro-ph.CO], High Energy Physics - Experiment (hep-ex), FIS/05 - ASTRONOMIA E ASTROFISICA, 0103 physical sciences, Alpha Magnetic Spectrometer, Cosmic rays, AMS, AMS, Nuclear Experiment, 010303 astronomy & astrophysics, Cosmic rays, Physics, Range (particle radiation), Earth's orbit, 010308 nuclear & particles physics, Astrophysics (astro-ph), Earth's magnetic field, FIS/01 - FISICA SPERIMENTALE, 13. Climate action, Physics::Space Physics, cosmic rays: protons, FIS/04 - FISICA NUCLEARE E SUBNUCLEARE, Particle Physics - Experiment
Abstract

The proton spectrum in the kinetic energy range 0.1 to 200 GeV was measured by the Alpha Magnetic Spectrometer (AMS) during space shuttle flight STS-91 at an altitude of 380 km. Above the geomagnetic cutoff the observed spectrum is parameterized by a power law. Below the geomagnetic cutoff a substantial second spectrum was observed concentrated at equatorial latitudes with a flux ~ 70 m^-2 sec^-1 sr^-1. Most of these second spectrum protons follow a complicated trajectory and originate from a restricted geographic region., 19 pages, Latex, 7 .eps figures

Published
2000

14. Study of the bunch crossing identification at LHC using microstrip gas chambers

Author

M. Bozzo, J.-F. Clergeau, Jean-Marie Brom, M. Loreti, A. Giraldo, O. Runolfsson, Franco Angelini, T. k´Ladziński, Pascal Vanlaer, M. Rebouillat, L. Jones, Alexander Toropin, B. C. MacEvoy, A. Bondar, F. Raffo, A. Peisert, R. Sachdeva, S. Quian, A. Morelli, A Pallarès, T Kachelhoffer, R. Bellazzini, C. Vander Velde, Michel Raymond, R. Hammarström, M. Miguet, D. Kryn, R. Haroutunian, N. Bacchetta, Gloria Spandre, Geoffrey Hall, G. Guillot, M.M. Massai, D. Vité, M. Millmore, M. Spezziga, F. Parodi, A. Brez, V. Nagaslaev, J.L. Riester, J.-C. Mabo, D. Bon, L. Shekhtman, J.-C. Caldero, Didier Contardo, G. Smadja, M.J. French, Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), CMS, Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Physics, Nuclear and High Energy Physics, Signal processing, Large Hadron Collider, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, Detector, 01 natural sciences, Particle detector, Microstrip, Nuclear physics, 0103 physical sciences, Measuring instrument, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Physics::Accelerator Physics, 010306 general physics, Instrumentation, Compact Muon Solenoid, Beam (structure)
Abstract

During the beam test of a tracker prototype for the Compact Muon Solenoid detector proposed for the LHC, the time response of the Microstrip Gas Chambers was studied using different gases and chamber gaps. The subsequent efficiency to identify the bunch crossing at LHC is discussed for several algorithms used in the off-line signal processing of the data.

Published
1996

15. Performance of a prototype of the CMS central detector

Author

Alexander Toropin, A Morelli, Devis Pantano, Franco Angelini, T. k´Ladziński, A. Pallarès, M Bozzo, C. Vannini, Alessandro Paccagnella, J.-F. Clergeau, Marco Meschini, T.I. Meyer, Nicola Bacchetta, L. Shekhtman, R. Bellazzini, R Carosi, Rino Castaldi, R. Wheadon, A. Caner, V. Karimäki, Michel Raymond, M.J. French, G Kachelhoffer, Jean-Marie Brom, Roberto Dell'Orso, Dario Bisello, Pascal Vanlaer, R. Ribeiro, Si-Jin Qian, R. Hammarström, D. Kryn, R. Sachdeva, R. Haroutunian, A. Markou, G Barichello, L. Jones, A. Peisert, O. Adriani, G. Smadja, G. Spandre, C. Vander Velde, F. Raffo, M. Millmore, M. Spezziga, F. Parodi, Piero Giorgio Verdini, V. Nagaslaev, J.L. Riester, F. Raffaelli, O. Runolfsson, Alberto Messineo, Geoffrey Hall, A. Brez, B. C. MacEvoy, G. Parrini, A. Giraldo, A. Basti, M. Loreti, Didier Contardo, Guido Tonelli, Ettore Focardi, Giuseppe Bagliesi, E Zevgolatakos, D. Vité, Marco Maria Massai, A Bondar, Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Institut de Physique Nucléaire de Lyon (IPNL), Centre National de la Recherche Scientifique (CNRS)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), CMS, Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Nuclear and High Energy Physics, Physics::Instrumentation and Detectors, Tracking (particle physics), 01 natural sciences, Microstrip, Nuclear physics, Optics, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], 010306 general physics, Instrumentation, Compact Muon Solenoid, Silicon microstrip detectors, Physics, Large Hadron Collider, CMS, 010308 nuclear & particles physics, business.industry, Detector, Tracking Detector, microstrip detector, Magnetic field, Physics::Accelerator Physics, High Energy Physics::Experiment, business, Beam (structure)
Abstract

A prototype of the barrel Tracking Detector of the Compact Muon Solenoid (CMS) experiment proposed for LHC was built and tested in a beam and in a magnetic field of up to 3 T. It contained six microstrip gas chambers, 25 cm long, and three double-sided silicon microstrip detectors, 12.5 cm long. We report some preliminary results on the performance of the chambers.

Published
1995

16. Radiation damage studies of field plate and p-stop n-side silicon microstrip detectors

Author

Phillip Allport, Paolo Giubellino, Marek Idzik, R. Wheadon, H. G. Moser, Pawel Grybos, P. Weilhammer, Shaun Roe, Wladyslaw Dabrowski, Luciano Ramello, D. Vité, J.D. Richardson, B.S. Avset, L. Evensen, B. C. MacEvoy, K. Gill, Andrzej Skoczeń, S. Moszczynski, R. J. Apsimon, C. Green, Geoffrey Hall, and J. Matheson

Subjects
Physics, Nuclear and High Energy Physics, Range (particle radiation), Photon, Field (physics), business.industry, Neutron temperature, Microstrip, Optics, Radiation damage, Irradiation, Detectors and Experimental Techniques, business, Instrumentation, Silicon microstrip detectors
Abstract

We present results from studies of the properties of dedicated n-side microstrip structures before and after irradiation, with photons to 7 Mrad and fast neutrons to 8 × 10 13 ncm −2 . Both p-stop and field plate devices were investigated, each having a range of strip geometries in order to determine optimal configurations for long-term viability and performance.

Published
1994

17. Radiation tolerance of single-sided silicon microstrips

Author

T. Mouthuy, J. Straver, A. Giraldo, Geoffrey Hall, H. G. Moser, I. Siotis, P A. Delpierre, M. Schuster, S. Moszczynski, Wladyslaw Dabrowski, A. Paccagnella, D. Vité, R. J. Apsimon, P. Weilhammer, N. A. Smith, L. Evensen, Phillip Allport, Stephen Watts, Marek Idzik, R. Wheadon, Paolo Giubellino, A. Hanneborg, M. Robbins, P.S.L. Booth, Demetrios Loukas, J.D. Richardson, Luciano Ramello, Konstantinos Misiakos, A. Holmes-Siedle, M. Schaeffer, J. Michele, Renato Turchetta, K. Zachariadou, Shaun Roe, M. Turala, K. Gill, E. Spiriti, M.-C. Habrard, R. Sachdeva, C. Arrighi, Ivan Mikulec, B.S. Avset, S. Sotthibandhu, J. C. Clemens, T.A. Hansen, Leonid Kurchaninov, Richard Brenner, Peter Chochula, Pawel Grybos, Manfred Krammer, Dario Bisello, W. L. Prado Da Silva, W. Dulinski, Institut de Recherches Subatomiques (IReS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Cancéropôle du Grand Est-Université Louis Pasteur - Strasbourg I-Centre National de la Recherche Scientifique (CNRS), Centre de Physique des Particules de Marseille (CPPM), Aix Marseille Université (AMU)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), RD20, and Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Aix Marseille Université (AMU)

Subjects
Physics, Nuclear and High Energy Physics, Silicon, Physics::Instrumentation and Detectors, 010308 nuclear & particles physics, business.industry, Physics::Medical Physics, Detector, chemistry.chemical_element, 01 natural sciences, Particle detector, Semiconductor detector, chemistry, Neutron flux, 0103 physical sciences, Radiation damage, Optoelectronics, Neutron, Irradiation, [PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det], Detectors and Experimental Techniques, 010306 general physics, business, Instrumentation
Abstract

The RD20 collaboration is investigating the design and operation of an LHC inner tracking detector based on silicon microstrips. Measurements have been made on prototype detectors after irradiation with electrons, neutrons, photons, and protons for doses up to 5 Mrad and fluences up to 10 15 particles/cm 2 . The annealing of effective doping changes caused by high neutron fluences, one of the major limits to detector lifetime at the LHC, is shown to be strongly inhibited by cooling below room temperature. Detailed results are presented on the critical issue of microstrip capacitance. We have also investigated bulk damage caused by high-energy protons, interstrip isolation after neutron irradiation, and MOS capacitors irradiated with electrons and photons.

Published
1994

18. Anticancer Agents

Author

Iwao Ojima, Gregory D. Vite, Karl-Heinz Altmann, E. A. Sausville, J. I. Johnson, G. M. Cragg, S. Decker, George R. Pettit, John F. Kadow, Thomas Alstadt, Shu-Hui Chen, Pierre Dextraze, Karen Du, Craig Fairchild, Jerzy Golik, Steven Hansel, Kathy A. Johnston, Robert A. Kramer, David R. Langley, Frank Lee, Byron Long, Harold Mastalerz, Carl Ouellet, Robert Perrone, William C. Rose, Paul Scola, Gene Schulze, Andrew Staab, Quifen May Xue, Michael Walker, Jen-Mei Wei, Mark Wittman, J. J. Kim Wright, Mary Zoeckler, Dolatrai M. Vyas, Scott D. Kuduk, Subrata Chakravarty, Songnian Lin, Tao Wang, Xudong Geng, Michael L. Miller, Pierre-Yves Bounaud, Evelyne Michaud, Young Hoon Park, Chung-Ming Sun, John C. Slater, Tadashi Inoue, Christopher P. Borella, John J. Walsh, Ralph J. Bernacki, Paula Pera, Jean M. Veith, Ezio Bombardelli, Antonella Riva, Srinivasa Rao, Lifeng He, George A. Orr, Susan B. Horwitz, Samuel J. Danishefsky, Giovanni Scambia, Cristiano Ferlini, Susan Band Horwitz, Laura A. Martello, Chia-Ping H. Yang, Amos B. Smith, Hayley M. McDaid, Robert M., Iwao Ojima, Gregory D. Vite, Karl-Heinz Altmann, E. A. Sausville, J. I. Johnson, G. M. Cragg, S. Decker, George R. Pettit, John F. Kadow, Thomas Alstadt, Shu-Hui Chen, Pierre Dextraze, Karen Du, Craig Fairchild, Jerzy Golik, Steven Hansel, Kathy A. Johnston, Robert A. Kramer, David R. Langley, Frank Lee, Byron Long, Harold Mastalerz, Carl Ouellet, Robert Perrone, William C. Rose, Paul Scola, Gene Schulze, Andrew Staab, Quifen May Xue, Michael Walker, Jen-Mei Wei, Mark Wittman, J. J. Kim Wright, Mary Zoeckler, Dolatrai M. Vyas, Scott D. Kuduk, Subrata Chakravarty, Songnian Lin, Tao Wang, Xudong Geng, Michael L. Miller, Pierre-Yves Bounaud, Evelyne Michaud, Young Hoon Park, Chung-Ming Sun, John C. Slater, Tadashi Inoue, Christopher P. Borella, John J. Walsh, Ralph J. Bernacki, Paula Pera, Jean M. Veith, Ezio Bombardelli, Antonella Riva, Srinivasa Rao, Lifeng He, George A. Orr, Susan B. Horwitz, Samuel J. Danishefsky, Giovanni Scambia, Cristiano Ferlini, Susan Band Horwitz, Laura A. Martello, Chia-Ping H. Yang, Amos B. Smith, Hayley M. McDaid, and Robert M.

Published
2001

19. A silicon microstrip tracker in space: Experience with the AMS silicon tracker on STS-91

Author

Adrian Biland, A. Klimentov, J. Casaus, P. Levtchenko, W. Wallraff, Timo Laitinen, M. Pauluzzi, D. Ren, M. Capell, A. Hasan, J. Berdugo, M. Bourquin, M. Ribordy, E. Fiandrini, V. Shoutko, Mauro Menichelli, F. Raupach, Roberto Battiston, J. Vandenhirtz, K. Lubelsmeyer, J. Alcaraz, J. Ulbricht, D. Vité, P. Bene, E. Riihonen, W. J. Burger, E. Perrin, S. Blasko, Philipp Azzarello, G. Lamanna, G. Viertel, D. Rapin, Markus Cristinziani, H. Suter, S.X. Wu, X. D. Cai, M. Weisgerber, Werner Lustermann, Behcet Alpat, T. Eronen, G. Ambrosi, T. S. Dai, J. P. Richeux, A. Lebedev, J. J. Torsti, P. Emonet, Nicolas Produit, B. Bertucci, P. Extermann, and H. Hofer

Subjects
Physics, Silicon, business.industry, Dark matter, Detector, chemistry.chemical_element, Space Shuttle, Cosmic ray, Nuclear physics, chemistry, Antimatter, International Space Station, Alpha Magnetic Spectrometer, Aerospace engineering, business
Abstract

The Alpha Magnetic Spectrometer (AMS) is designed as an independent module for installation on the International Space Station (ISS) in the year 2003 for an operational period of three years. The principal scientific objectives include the searches for antimatter and dark matter in cosmic rays. The AMS tracker uses silicon microstrip sensors to reconstruct charged-particle trajectories. A first version of the AMS, equipped with 2.1 m2 of silicon sensors and a permanent magnet, was flown on the NASA space shuttle Discovery duringJune 2–12, 1998. In this contribution, we describe the detector and present results of the tracker performance duringthe flight.

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