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9 results on '"UV lenses"'

1. The COMPASS RICH-1 fast photon detection system

Author

Abbon, P., Alexeev, M., Angerer, H., Birsa, R., Bordalo, P., Bradamante, F., Bressan, A., Chiosso, M., Ciliberti, P., Colantoni, M.L., Dafni, T., Dalla Torre, S., Delagnes, E., Denisov, O., Deschamps, H., Diaz, V., Dibiase, N., Duic, V., Eyrich, W., and Ferrero, A.

Subjects
*DETECTORS, *ENGINEERING instruments, *NUCLEAR counters, *CATHODE rays
Abstract

Abstract: A fast photon detection system has been built as a part of the upgrade of the COMPASS RICH-1 detector: it is based on 576 multi-anode photomultiplier tubes (MAPMTs) coupled to individual fused silica lens telescopes and fast readout electronics. This system has replaced the MWPCs with CsI photo-cathodes in the central region (, 25% of the total area) of the COMPASS RICH-1 photon detectors and has successfully been operated during the data taking in 2006 and 2007. We report about the fast photon detection system design, construction and commissioning, in particular about the design optimization and the validation tests of the lens telescopes. Preliminary values for the increased performances of COMPASS RICH-1 after the upgrade are also presented. [Copyright &y& Elsevier]

Published
2008
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2. The fast photon detection system of COMPASS RICH-1

Author

Abbon, P., Alekseev, M., Angerer, H., Apollonio, M., Birsa, R., Bordalo, P., Bradamante, F., Bressan, A., Busso, L., Chiosso, M., Ciliberti, P., Colantoni, M.L., Costa, S., Dafni, T., Dalla Torre, S., Delagnes, E., Deschamps, H., Diaz, V., Dibiase, N., and Duic, V.

Subjects
*DETECTORS, *PHOTONS, *CONSTRUCTION contracts, *NUCLEAR counters
Abstract

Abstract: A fast photon detection system has been built for the upgrade of COMPASS RICH-1, the large size gaseous RICH detector in use at the COMPASS Experiment at the CERN SPS since 2001. The photon detectors of the central region have been replaced by a new system based on multi-anode photomultipliers coupled to individual fused silica lens telescopes and a fast readout electronics system, while in the outer region the existing MWPCs with CsI photocathodes have been equipped with a new readout system, based on the APV chip. RICH-1 has been successfully operated in its upgraded version during the 2006 run. We report on the upgrade design and construction, and on the preliminary characterization of the upgraded RICH-1 performances: at saturation about 60 photons per ring have routinely been obtained and the background level has drastically been reduced thanks to the good time resolution of the new system, leading to a 2 –K separation above 55GeV/c. [Copyright &y& Elsevier]

Published
2007
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3. Design and status of COMPASS FAST-RICH

Author

Abbon, P., Alekseev, M., Angerer, H., Apollonio, M., Birsa, R., Bordalo, P., Bradamante, F., Bressan, A., Busso, L., Chiosso, M., Ciliberti, P., Colantoni, M.L., Costa, S., Dalla Torre, S., Delagnes, E., Deschamps, H., Diaz, V., Dibiase, N., Duic, V., and Eyrich, W.

Subjects
*EINSTEIN-Podolsky-Rosen experiment, *ELECTRONIC systems, *INTEGRATED circuits, *QUANTUM theory
Abstract

Abstract: In the context of the upgrade of COMPASS RICH-1, we are developing a fast photodetection system for RICH counters, based on UV extended Multi-Anode PhotoMultiplier Tubes (MAPMT) and a custom, low dead-time electronic readout system. Photons are concentrated on the MAPMT photocathode by an optical system that preserves the position information. The ratio between the collection and the photosensitive surfaces is in our design, larger than in previous applications. A new front-end electronics, based on a modified version of the MAD4 discriminator chip, is being realized to digitize the MAPMT signals. We report about the design of the photodetection system and of the associated electronic readout system, and on the preliminary test beam results. [Copyright &y& Elsevier]

Published
2006
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4. Studies for a fast RICH

Author

Alekseev, M., Birsa, R., Bradamante, F., Bressan, A., Busso, L., Ciliberti, P., Colantoni, M.L., Costa, S., Dalla Torre, S., Diaz, V., Di Biase, N., Duic, V., Faso, D., Ferrero, A., Finger, M., Giorgi, M., Gobbo, B., Horikawa, S., Kramer, D., and Maggiora, A.

Subjects
*PHOTON detectors, *NUCLEAR counters, *FUSED silica, *SILICON compounds
Abstract

Abstract: We are developing the design of a photon detection system for a fast RICH, to match the requirements arising from the foreseen enlarged luminosity of the COMPASS experiment. The system is based on UV extended multianode photomultipliers and a system of fused silica lenses that collect the light from a larger surface and guide it to the PMT photocathode, preserving the position information. In our design the ratio of the collection and the photosensitive surfaces is larger than in previous applications (it is of the order of 9), to keep the costs of the photon detection system affordable, while the emphasis is on the fast response of the detectors and the associated electronics. We report about the design parameters and the preliminary test beam results. [Copyright &y& Elsevier]

Published
2005
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5. Fast photon detection for COMPASS RICH-1

Author

Abbon, P., Alekseev, M., Angerer, H., Apollonio, M., Birsa, R., Bordalo, P., Bradamante, F., Bressan, A., Busso, L., Chiosso, M., Ciliberti, P., Colantoni, M.L., Costa, S., Dibiase, N., Dafni, T., Torre, S. Dalla, Diaz, V., Duic, V., Delagnes, E., and Deschamps, H.

Subjects
*PHOTOMULTIPLIERS, *SILICON compounds, *ENGINEERING instruments, *PHYSICS instruments
Abstract

Abstract: A fast photon detection system has been built and assembled for the upgrade of COMPASS RICH-1. The system is based on multianode photomultipliers coupled to fused silica lenses to collect the light from a larger surface and to guide it to the photocathode, preserving the position information. The emphasis is on the fast response and high rate capability of the detectors and the associated electronics. The photon detection system is now ready and it will be employed in the 2006 COMPASS data taking. We report about the system design and construction. [Copyright &y& Elsevier]

Published
2007
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6. Fast photon detection for COMPASS RICH-1

Author

P. Abbon, M. Alekseev, H. Angerer, M. Apollonio, R. Birsa, P. Bordalo, F. Bradamante, A. Bressan, L. Busso, M. Chiosso, P. Ciliberti, M.L. Colantoni, S. Costa, N. Dibiase, T. Dafni, S. Dalla Torre, V. Diaz, V. Duic, E. Delagnes, H. Deschamps, W. Eyrich, D. Faso, A. Ferrero, M. Finger, H. Fischer, S. Gerassimov, M. Giorgi, B. Gobbo, D. von Harrach, F.H. Heinsius, R. Joosten, B. Ketzer, K. Königsmann, V.N. Kolosov, I. Konorov, D. Kramer, F. Kunne, S. Levorato, A. Maggiora, A. Magnon, A. Mann, A. Martin, G. Menon, A. Mutter, O. Nähle, D. Neyret, F. Nerling, P. Pagano, S. Paul, S. Panebianco, D. Panzieri, G. Pesaro, C. Pizzolotto, J. Polak, P. Rebourgeard, E. Rocco, F. Robinet, P. Schiavon, C. Schill, P. Schoenmeier, L. Silva, M. Slunecka, L. Steiger, F. Sozzi, M. Sulc, M. Svec, F. Tessarotto, A. Teufel, H. Wollny, Abbon, P, Alekseev, M, Angerer, H, Apollonio, M, Birsa, R, Bordalo, P, Bradamante, Franco, Bressan, Andrea, Busso, L, Chiosso, M, Ciliberti, Piero, COLANTONI M., L, Costa, S, Dibiase, N, Dafni, T, TORRE S., Dalla, Diaz, V, Duic, V, Delagnes, E, Deschamps, H, Eyrich, W, Faso, D, Ferrero, A, Finger, M, FINGER M., Jr, Fischer, H, Gerassimov, S, Giorgi, Marcello, Gobbo, B, VON HARRACH, D, HEINSIUS F., H, Joosten, R, Ketzer, B, Königsmann, K, KOLOSOV V., N, Konorov, I, Kramer, D, Kunne, F, Levorato, Stefano, Maggiora, A, Magnon, A, Mann, A, Martin, Anna, Menon, G, Mutter, A, Nähle, O, Neyret, D, Nerling, F, Pagano, P, Paul, S, Panebianco, S, Panzieri, D, Pesaro, G, Pizzolotto, C, Polak, J, Rebourgeard, P, Rocco, E, Robinet, F, Schiavon, Paolo, Schill, C, Schoenmeier, P, Silva, L, Slunecka, M, Steiger, L, Sozzi, F, Sulc, M, Svec, M, Tessarotto, F, Teufel, A, and Wollny, H.

Subjects
Physics, Nuclear and High Energy Physics, Photomultiplier, business.industry, UV lenses, Emphasis (telecommunications), Detector, COMPASS, Photocathode, Optics, Upgrade, Photon detection, Compass, RICH, Multianode photomultiplier tubes, Systems design, Electronics, business, Instrumentation
Abstract

A fast photon detection system has been built and assembled for the upgrade of COMPASS RICH-1. The system is based on multianode photomultipliers coupled to fused silica lenses to collect the light from a larger surface and to guide it to the photocathode, preserving the position information. The emphasis is on the fast response and high rate capability of the detectors and the associated electronics. The photon detection system is now ready and it will be employed in the 2006 COMPASS data taking. We report about the system design and construction.

Published
2007

7. The fast photon detection system of COMPASS RICH-1

Author

P. Abbon, M. Alekseev, H. Angerer, M. Apollonio, R. Birsa, P. Bordalo, F. Bradamante, A. Bressan, L. Busso, M. Chiosso, P. Ciliberti, M.L. Colantoni, S. Costa, T. Dafni, S. Dalla Torre, E. Delagnes, H. Deschamps, V. Diaz, N. Dibiase, V. Duic, W. Eyrich, D. Faso, A. Ferrero, M. Finger, H. Fischer, S. Gerassimov, M. Giorgi, B. Gobbo, D. von Harrach, F.H. Heinsius, R. Joosten, B. Ketzer, V.N. Kolosov, K. Königsmann, I. Konorov, D. Kramer, F. Kunne, A. Lehmann, S. Levorato, A. Maggiora, A. Magnon, A. Mann, A. Martin, G. Menon, A. Mutter, O. Nähle, F. Nerling, D. Neyret, P. Pagano, S. Panebianco, D. Panzieri, S. Paul, G. Pesaro, C. Pizzolotto, J. Polak, P. Rebourgeard, E. Rocco, F. Robinet, P. Schiavon, C. Schill, P. Schoenmeier, W. Schröder, L. Silva, M. Slunecka, F. Sozzi, L. Steiger, M. Sulc, M. Svec, F. Tessarotto, A. Teufel, H. Wollny, Abbon, P., Alekseev, M., Angerer, H., Apollonio, M., Birsa, R., Bordalo, P., Bradamante, F., Bressan, A., Busso, L., Chiosso, M., Ciliberti, P., Colantoni, M. L., Costa, S., Dafni, T., Dalla Torre, S., Delagnes, E., Deschamps, H., Diaz, V., Dibiase, N., Duic, V., Eyrich, W., Faso, D., Ferrero, A., Finger, M., Finger Jr., M., Fischer, H., Gerassimov, S., Giorgi, M., Gobbo, B., von Harrach, D., Heinsius, F. H., Joosten, R., Ketzer, B., Kolosov, V. N., Königsmann, K., Konorov, I., Kramer, D., Kunne, F., Lehmann, A., Levorato, S., Maggiora, A., Magnon, A., Mann, A., Martin, A., Menon, G., Mutter, A., Nähle, O., Nerling, F., Neyret, D., Pagano, P., Panebianco, S., Panzieri, D., Paul, S., Pesaro, G., Pizzolotto, Cecilia, Polak, J., Rebourgeard, P., Rocco, E., Robinet, F., Schiavon, P., Schill, C., Schoenmeier, P., Schröder, W., Silva, L., Slunecka, M., Sozzi, F., Steiger, L., Sulc, M., Svec, M., Tessarotto, F., Teufel, A., Wollny, H., Abbon, P, Alekseev, M, Angerer, H, Apollonio, M, Birsa, R, Bordalo, P, Bradamante, F, Bressan, Andrea, Busso, L, Chiosso, M, Ciliberti, Piero, COLANTONI M., L, Costa, S, Dafni, T, DALLA TORRE, S, Delagnes, E, Deschamps, H, Diaz, V, Dibiase, N, Duic, V, Eyrich, W, Faso, D, Ferrero, A, Finger, M, FINGER M., Jr, Fischer, H, Gerassimov, S, Giorgi, M, Gobbo, B, VON HARRACH, D, HEINSIUS F., H, Joosten, R, Ketzer, B, KOLOSOV V., N, Königsmann, K, Konorov, I, Kramer, D, Kunne, F, Lehmann, A, Levorato, Stefano, Maggiora, A, Magnon, A, Mann, A, Martin, Anna, Menon, G, Mutter, A, Nähle, O, Nerling, F, Neyret, D, Pagano, P, Panebianco, S, Panzieri, D, Paul, S, Pesaro, G, Pizzolotto, C, Polak, J, Rebourgeard, P, Rocco, E, Robinet, F, Schiavon, Paolo, Schill, C, Schoenmeier, P, Schröder, W, Silva, L, Slunecka, M, Sozzi, F, Steiger, L, Sulc, M, Svec, M, Tessarotto, F, and Teufel, A

Subjects
Photomultiplier, Nuclear and High Energy Physics, Photon, Multi-anode photomultiplier tubes, Physics::Instrumentation and Detectors, UV lenses, COMPASS, Photon detection, RICH, Instrumentation, law.invention, FAST-RICH, DEUTERON, READOUT, DESIGN, Optics, law, Multi-anode photomultiplier tube, Compass, COMPASS experiment, Nuclear and High Energy Physic, Physics, Large Hadron Collider, business.industry, Detector, Lens (optics), Upgrade, UV lense, High Energy Physics::Experiment, business
Abstract

A fast photon detection system has been built for the upgrade of COMPASS RICH-1, the large size gaseous RICH detector in use at the COMPASS Experiment at the CERN SPS since 2001. The photon detectors of the central region have been replaced by a new system based on multi-anode photomultipliers coupled to individual fused silica lens telescopes and a fast readout electronics system, while in the outer region the existing MWPCs with CsI photocathodes have been equipped with a new readout system, based on the APV chip. RICH-1 has been successfully operated in its upgraded version during the 2006 run. We report on the upgrade design and construction, and on the preliminary characterization of the upgraded RICH-1 performances: at saturation about 60 photons per ring have routinely been obtained and the background level has drastically been reduced thanks to the good time resolution of the new system, leading to a 2 σ π –K separation above 55 GeV/c.

Published
2007

8. Studies for a fast RICH

Author

Alan D. Martin, B. Gobbo, S. Horikawa, G. Menon, R. Birsa, M.G. Alekseev, V. Diaz, M. Finger, L. Busso, D. Panzieri, P. Schiavon, V. Duic, S. Costa, Andrea Ferrero, S. Dalla Torre, Paolo Pagano, D. Faso, Daniel B. Kramer, M.L. Colantoni, N. Di Biase, F. Tessarotto, Andrea Bressan, M. Giorgi, Franco Bradamante, A. Maggiora, P. Ciliberti, Miroslav Sulc, F. Sozzi, M., Alekseev, R., Birsa, F., Bradamante, Bressan, Andrea, L., Busso, Ciliberti, Piero, M. L., Colantoni, S., Costa, S., DALLA TORRE, V., Diaz, N., DI BIASE, V., Duic, D., Faso, A., Ferrero, M., Finger, Giorgi, Marcello, B., Gobbo, S., Horikawa, D., Kramer, A., Maggiora, Martin, Anna, G., Menon, P., Pagano, D., Panzieri, Schiavon, Paolo, F., Sozzi, M., Sulc, and F., Tessarotto

Subjects
Physics, Nuclear and High Energy Physics, Photomultiplier, Luminosity (scattering theory), COMPASS, RICH, Multianode photomultiplier tubes, UV lenses, business.industry, Emphasis (telecommunications), Detector, Photocathode, Optics, Position (vector), COMPASS experiment, Electronics, business, Instrumentation
Abstract

We are developing the design of a photon detection system for a fast RICH, to match the requirements arising from the foreseen enlarged luminosity of the COMPASS experiment. The system is based on UV extended multianode photomultipliers and a system of fused silica lenses that collect the light from a larger surface and guide it to the PMT photocathode, preserving the position information. In our design the ratio of the collection and the photosensitive surfaces is larger than in previous applications (it is of the order of 9), to keep the costs of the photon detection system affordable, while the emphasis is on the fast response of the detectors and the associated electronics. We report about the design parameters and the preliminary test beam results.

Published
2005

9. Hartmann test of the COMPASS RICH-1 optical telescopes

Author

Abbon, P., Alekseev, M., Angerer, H., Apollonio, M., Birsa, R., Bordalo, P., Bradamante, F., Andrea Bressan, Busso, L., Chiosso, V. M., Ciliberti, P., Colantoni, M. L., Costa, S., Dibiase, N., Dafni, T., Torre, S. Dalla, Diaz, V., Duic, V., Delagnes, E., Deschamps, H., Eyrich, W., Faso, D., Ferrero, A., Finger, M., Fischer, H., Gerassimov, S., Giorgi, M., Gobbo, B., Hagemann, R., Harrach, D., Heinsius, F. H., Joosten, R., Ketzer, B., Koenigsmann, K., Kolosov, V. N., Konorov, I., Kramer, D., Kunne, F., Levorato, S., Maggiora, A., Magnon, A., Mann, A., Martin, A., Menon, G., Mutter, A., Naehle, O., Neyret, D., Nerling, F., Pagano, P., Paul, S., Panebianco, S., Panzieri, D., Pesaro, G., Pizzolotto, C., Polak, J., Rebourgeard, P., Rocco, E., Robinet, F., Schiavon, P., Schill, C., Schoenmeier, P., Silva, L., Slunecka, M., Steiger, L., Sozzi, F., Sulc, M., Svec, M., Tessarotto, F., Teufel, A., Wollny, H., P., Abbon, T., Dafni, E., Delagne, H., Deschamp, F., Kunne, A., Magnon, D., Neyret, S., Panebianco, P., Rebourgeard, F., Robinet, M., Alekseev, L., Busso, M., Chiosso, S., Costa, N., Dibiase, D., Faso, A., Ferrero, A., Maggiora, H., Angerer, S., Gerasimov, B., Ketzer, I., Konorov, A., Mann, S., Paul, M., Apollonio, R., Birsa, F., Bradamante, Bressan, Andrea, Ciliberti, Piero, S., DALLA TORRE, V., Diaz, V., Duic, M., Giorgi, B., Gobbo, Levorato, Stefano, Martin, Anna, G., Menon, P., Pagano, G., Pesaro, E., Rocco, Schiavon, Paolo, F., Sozzi, F., Tessarotto, P., Bordalo, L., Silva, M. L., Colantoni, D., Panzieri, W., Eyrich, C., Pizzolotto, P., Schonmeier, A., Teufel, M., Finger, M., Slunecka, H., Fischer, R., Hagemann, F. H., Heinsiu, K., Konigsmann, A., Mutter, F., Nerling, C., Schill, H., Wollny, D., VON HARRACH, R., Joosten, O., Nahle, V. N., Kolosov, D., Kramer, J., Polak, L., Steiger, M., Sulc, and M., Svec

Subjects
UV lenses, Hartmann test, Particle Physics - Experiment, COMPASS RICH1
Abstract

The central region of COMPASS RICH-1 has been equipped with a new photon detection system based on MultiAnode PhotoMultiplier Tubes (MAPMT). The Cherenkov photons are focused by an array of 576 fused silica telescopes onto 576 MAPMTs. The quality and positioning of all optical components have been tested by Hartmann method. The validation procedures are described. The quality of the optical concentrators was checked and alignment corrections were made. The upgraded detector showed excellent performances during 2006 data taking.

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