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1. Statistical equations and methods applied to the precision muon experiment at BNL

Author

H. N. Brown, S. Sedykh, Lawrence Sulak, F. J. M. Farley, J. M. Paley, G. zu Putlitz, S. I. Redin, Klaus-Peter Jungmann, F. Krienen, L. Duong, I. Kronkvist, Masahiko Iwasaki, T. Qian, P. T. Debevec, Alexei Trofimov, Wuzheng Meng, J. P. Miller, D. Kawall, M. Grosse-Perdekamp, R. Prigl, J. Mi, R. McNabb, E. Efstathiadis, A. Steinmetz, A. Yamamoto, Yannis K. Semertzidis, D. Nikas, G. Bunce, B. L. Roberts, B. Bousquet, J. Kindem, C. Ozben, G. W. Bennett, B.I. Khazin, Q. Peng, C. Timmermans, A. Lam, I. Logashenko, M. Kawamura, Frederick Gray, M. Deile, William Morse, Yu. F. Orlov, M. Sossong, V. W. Hughes, Yu. M. Shatunov, O. Rind, G.V. Fedotovich, D.N. Grigoriev, N.M. Ryskulov, P. M. Shagin, A. Grossmann, Y.Y. Lee, D. Warburton, J. Pretz, G. T. Danby, P. von Walter, Satish Dhawan, E. P. Sichtermann, V. P. Druzhinin, Rasmus Larsen, H. Deng, M. F. Hare, D. Winn, D. Urner, X. Huang, C. J. G. Onderwater, E. P. Solodov, R. M. Carey, D. Zimmerman, C. C. Polly, William Deninger, D. W. Hertzog, S. Giron, and P. Cushman

Subjects
Physics, Larmor precession, Nuclear and High Energy Physics, Muon, Quality (physics), Nuclear magnetic resonance, Minification, Electron, Function (mathematics), Instrumentation, Spin-½, Computational physics, Weighting
Abstract

In the muon ( g - 2 ) experiment at Brookhaven National Laboratory, the spin precession frequency ω a is obtained from a standard χ 2 minimization fit applied to the time distribution of decay electrons. The unusually high accuracy ( ∼ 0.5 ppm ) of the experiment puts stringent requirements on the quality of the fit and the level of understanding of the statistical properties of the fitted parameters. We discuss the properties of the fits and their implications on the derived value for ω a , including estimates of the effect of an imperfect fit function, methods of including additional external information to reduce the error, the effects of splitting the data into many smaller subsets of data, applying different weighting methods to the data using energy information, and various tests of data suitability.

Published
2007
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2. Recent results from the BNL g-2 experiment

Author

D.N. Grigoriev, D. Zimmerman, M. Sossong, C. Ozben, C. C. Polly, P. Cushman, Satish Dhawan, J. Pretz, F. J. M. Farley, I. Logashenko, P. von Walter, E. P. Solodov, G. zu Putlitz, S. I. Redin, R. M. Carey, Klaus-Peter Jungmann, D. W. Hertzog, A. Grossman, Frederick Gray, F. Krienen, D. Urner, Masahiko Iwasaki, S. Giron, C. J. G. Onderwater, L. Duong, Wuzheng Meng, Y.Y. Lee, H. N. Brown, Rasmus Larsen, R. Prigl, J. Mi, L. R. Sulak, J. P. Miller, O. Rind, H. Deng, B. L. Roberts, R. McNabb, A. Yamamoto, J. M. Paley, N.M. Ryskulov, William Deninger, D. Winn, C. Timmermans, D. Warburton, Alexei Trofimov, Yannis K. Semertzidis, E. P. Sichtermann, E. Efstathiadis, A. Steinmetz, M. F. Hare, S. Sedykh, G.V. Fedotovich, William Morse, I. Kronkvist, M. Deile, G. T. Danby, D. Kawall, V. P. Druzhinin, D. Nikas, P. T. Debevec, V. W. Hughes, M. Grosse-Perdekamp, Yu. M. Shatunov, J. Kindem, B.I. Khazin, M. Kawamura, G. Bunce, and Yuri F. Orlov

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Muon, Anomalous magnetic dipole moment, Electron, Atomic and Molecular Physics, and Optics, Nuclear physics, Data set, Magnetic-moment, Physics::Accelerator Physics, High Energy Physics::Experiment, National laboratory, Storage ring
Abstract

The status of the muon g — 2 experiment at the AGS facility of Brookhaven National Laboratory is discussed. Data obtained in 1999 with positive muons has been analyzed and published. The final data set contained 0.95 × 10 9 events and had an accuracy of 1.3 ppm . Approximately four times more data with positive muons and three times more data with negative muons were obtained in 2000 and 2001, respectively. These data were obtained with a more uniform magnetic field and with different storage ring tunes. An accuracy of the order of 0.5 ppm is anticipated.

Published
2002

3. Recent results and current status of the muon g-2 experiment at BNL

Author

Alexei Trofimov, E. Efstathiadis, A. Steinmetz, Q. Peng, Yu. F. Orlov, P. von Walter, E. P. Solodov, D.N. Grigoriev, R. M. Carey, Yannis K. Semertzidis, Rasmus Larsen, Wuzheng Meng, H. Deng, A. Yamamoto, D. Nikas, D. Urner, G. T. Danby, D. Winn, J. M. Paley, R. Prigl, J. Mi, R. McNabb, S. K. Dhawan, V. P. Druzhinin, B. L. Roberts, F. Krinen, T. Qian, P. Cushman, Frederick Gray, C. J. G. Onderwater, J. Kindem, F. J. M. Farley, C. Ozben, P. T. Debevec, G. zu Putlitz, Yu. M. Shatunov, M. Deile, P. M. Shagin, S. I. Redin, X. Huang, E. P. Sichtermann, C. Timmermans, M. F. Hare, I. Kronkvist, B. Bousquet, O. Rind, I.B. Logashenko, B.I. Khazin, L. Duong, M. Kawamura, J. P. Miller, D. Warburton, M. Sossong, J. Pretz, D. Kawall, A. Grossmann, G. Bunce, Klaus-Peter Jungmann, Masahiko Iwasaki, V. W. Hughes, A. Lam, H. N. Brown, N.M. Ryskulov, S. Sedykh, M. Grosse-Perdekamp, G. W. Bennett, D. Zimmerman, William Deninger, L. R. Sulak, Y. Y. Lee, William Morse, D. W. Hertzog, S. Giron, and G.V. Fedotovich

Subjects
Physics, Particle physics, Muon, Anomalous magnetic dipole moment, General Physics and Astronomy, Charge (physics), Elementary particle, Electron, Nmr, Standard Model, Nuclear physics, Anomalous magnetic-moment, Positive muon, Storage ring, Lepton
Abstract

The measurement of the (g−2) value of leptons provides a unique test of theory since it is the only quantity (unlike charge and mass) calculable in the framework of the Standard Model of elementary particles. The muon (g−2) experiment E821 is currently in progress at Brookhaven National Laboratory. Four data taking runs for positive muons and one run for negative muons were successfully accomplished in 1997–2000 and 2001, respectively. Results of the 1997–2000 runs have been published, thus completing our experiment for μ+. Data analysis for the 2001 run for μ− is currently in progress. To provide measurement of \(a_\mu = \tfrac{1} {2}(g - 2)_{\mu ^ - }\) at the same level of accuracy as for \(a_{\mu ^ + } = \tfrac{1} {2}(g - 2)_{\mu ^ + }\), we need to have one more data taking run.

Published
2002

4. Muon g — 2 experiment at Brookhaven National Laboratory

Author

N.M. Ryskulov, L. Duong, C. Ozben, P. Cushman, F. Krienen, D.N. Grigoriev, H. N. Brown, Rasmus Larsen, Wuzheng Meng, Y.Y. Lee, P. von Walter, Yu. M. Shatunov, G.V. Fedotovich, H. Deng, M. Sossong, William Deninger, D. Winn, A. Grossmann, J. Pretz, E. P. Sichtermann, D. Urner, M. F. Hare, E. P. Solodov, R. M. Carey, C. Timmermans, William Morse, V. W. Hughes, F. J. M. Farley, Alexei Trofimov, R. Prigl, J. Mi, E. Efstathiadis, A. Steinmetz, D. Warburton, R. McNabb, D. Zimmerman, G. zu Putlitz, D. Kawall, S. I. Redin, D. Nikas, C. C. Polly, J. Kindem, Satish Dhawan, J. M. Paley, L. R. Sulak, Klaus-Peter Jungmann, J. P. Miller, B. L. Roberts, Masahiko Iwasaki, Yannis K. Semertzidis, G. T. Danby, C. J. G. Onderwater, M. Kawamur, V. P. Druzhinin, M. Deile, Frederick Gray, P. T. Debevec, A. Yamamoto, D. W. Hertzog, O. Rind, S. Giron, I. Kronkvist, Yuri F. Orlov, G. Bunce, B.I. Khazin, S. Sedykh, I. Logashenko, and M. Grosse-Perdekamp

Subjects
Physics, Nuclear physics, Nuclear and High Energy Physics, Muon, Alternating Gradient Synchrotron, National laboratory, Atomic and Molecular Physics, and Optics
Abstract

A precise measurement of the anomalous g value, a(mu)(+) = (g - 2)/2, for the positive muon has been made at the Brookhaven Alternating Gradient Synchrotron. The result a(mu)(+) = 11 659 202(14)(6) x 10(-10) (1.3 ppm) is in good agreement with previous measurements and has an error one third that of the combined previous data. The current theoretical value from the standard model is a(mu) (SM)= 11 659 159.6(6.7) x 10(-10) (0.57 ppm) and a(mu)(exp)-a(mu)(SM) = 42(16) x 10(-10) in which a(mu)(exp) is the world average experimental value.

Published
2002
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5. Personal navigation using novel methods of human motion modeling

Author

Charles K. Toth, Dorota Grejner-Brezinsaka, Andrew Zaydak, and William Deninger

Subjects
Engineering, Inertial frame of reference, Situation awareness, business.industry, Human–computer interaction, Global Positioning System, Map matching, business, Sensor fusion, Field (computer science), Mobile robot navigation, Motion (physics), Simulation
Abstract

The widespread use of smartphones and other personal devices provides a low cost sensing platform giving easy access to a variety of data. The availability of this rich data provides opportunities to develop new applications for personal use in areas such as health monitoring, situational awareness, and location-awareness. Of these, personal navigation and localization is of rapidly-growing commercial interest. There have been considerable research efforts to improve navigation capabilities using the embedded inertial, optical, and magnetic sensors in personal devices. This spans GPS augmentation, inertial and vision based solutions, map matching, and other sensor fusion approaches. One emerging method is to improve contextual awareness by detecting and classifying relevant human motions. This may be done by building human locomotion models primarily based on inertial and magnetic data. Once reliable models are constructed, they can be calibrated to a motion's magnitude and frequency. The derived information can then be integrated into the navigation solution; improving performance in indoor and other GPS challenged navigation environments. A case application is a human motion aware advanced pedometer. Several methods of dynamically modeling human motions have been proposed in literature. Each method has constraints and often non-obvious drawbacks. This paper first provides a survey of existing methods along with important but often overlooked details. Although the processing power of small personal devices is quickly growing, the computational load for real-time applications is still a constraint. Therefore, an evaluation of these methods based on their computational cost of reliable performance is provided. Finally, a case study with field test results will be presented. Three motions states were chosen for field tests; walking forward, walking backward, and running. Conclusions regarding suitability of personal navigation will be presented.

Published
2014
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6. Muon g-2 experiment at Brookhaven National Laboratory

Author

C. Ozben, S. Sedykh, O. Rind, M. Sossong, N.M. Ryskulov, V. W. Hertzog, I. Kronkvist, D. Kawall, Yuri F. Orlov, I. Logashenko, J. Pretz, A. Yamamoto, J. Kindem, W. Earle, G.V. Fedotovich, F. Krienen, Rasmus Larsen, B.I. Khazin, P. V. Walter, Yu. M. Shatunov, M. Kawamura, G. zu Putlitz, E. Hazen, H. Deng, Frederick Gray, Wuzheng Meng, C. Pai, J. P. Miller, C. Timmermans, M. Grosse-Perdekamp, D. Warburton, L. Duong, H. N. Brown, F. J. M. Farley, R. Prigl, J. Mi, D. Winn, R. McNabb, Y. Y. Lee, William Morse, S. I. Redin, Alexei Trofimov, A. Grossmann, L. R. Sulak, A. Steinmetz, G. Bunce, E. P. Sichtermann, P. T. Debevec, J. M. Paley, D. W. Hertzog, S. Giron, Ulrich Haeberlen, G. T. Danby, V. P. Druzhinin, B. L. Roberts, Yannis K. Semertzidis, E. Efstathiadia, C. J. G. Onderwater, D. Urner, S. K. Dhawan, William Deninger, C. C. Polly, E. P. Solodov, R. M. Carey, Klaus-Peter Jungmann, Masahiko Iwasaki, P. Cushman, and D. Nikas

Subjects
Nuclear physics, Data set, Physics, Anomalous magnetic-moment, Nuclear and High Energy Physics, Particle physics, Muon, Anomalous magnetic dipole moment, Astronomy and Astrophysics, Positive muon, National laboratory, Atomic and Molecular Physics, and Optics
Abstract

By the end of an excellent data taking in 1999, we collected approximate to1 billion decay positrons with energy greater than 2 GeV and 30 mus after injection. The analysis of the 1999 data set were performed in parallel by various teams in the collaboration and each team provides a different approach to the analysis. The projected errors are expected to be of order 1.3 ppm statistical and below 0.5 ppm systematic. The data obtained in the 2000 run contains,approximate to4 times more decay positrons compared to 1999.

Published
2001

7. Status of the BNL muon (g-2) experiment

Author

W.M. Morse, S. I. Serednyakov, Yu. M. Shatunov, S. Sedykh, C. J. G. Onderwater, N.M. Ryskulov, A. Yamamoto, Lawrence Sulak, O. Rind, C. Timmermans, F. J. M. Farley, M. Sossong, P. Neumayer, H. N. Brown, G. zu Putlitz, D. Urner, S. I. Redin, W. Meng, J. Pretz, I. Kronkvist, P. T. Debevec, E. Hazen, L. Duong, E. Efstathiadis, J. Kindem, Yuri F. Orlov, S. K. Dhawan, J. P. Miller, D. W. Hertzog, M. Tanaka, V. W. Hughes, Frederick Gray, G.T. Danby, Robert Sanders, D. Miller, F. Krienen, Y.Y. Lee, Wen Liu, Klaus-Peter Jungmann, W. Earle, Masahiko Iwasaki, G. Bunce, B.I. Khazin, M. Grosse Perdekamp, M. Kawamura, D. Zimmerman, P. Cushman, C. Pai, D. Warburton, C. C. Polly, H. Deng, D. Winn, A. Grossmann, E. P. Solodov, R. M. Carey, William Deninger, M. F. Hare, G.V. Fedotovich, I.B. Logashenko, R. Prigl, J. Mi, R. McNabb, D. Kawall, Alexei Trofimov, A. Steinmetz, V. P. Druzhinin, B. L. Roberts, S. Giron, Yannis K. Semertzidis, R. Larsen, and Ulrich Haeberlen

Subjects
Larmor precession, Physics, Particle physics, Large Hadron Collider, Muon, Muon storage ring, Meson, Proton, Physics::Instrumentation and Detectors, Electron, Superconducting coils, G factor, Nuclear magnetic resonance, Nuclear physics, Physics::Accelerator Physics, High Energy Physics::Experiment, Supersymmetry, Electrical and Electronic Engineering, Spin precession, Superconducting Coils, Instrumentation, Storage ring, Standard model
Abstract

The muon (g-2) experiment at Brookhaven completed a first run in June and July 1997. The main components of the experiment, which include the superconducting inflector, the superferric storage ring, the electrostatic quadrupoles and the lead-scintillating fiber electron calorimeters, have been commissioned satisfactorily. Our first measurement of the ratio R of the spin precession frequency of the positive muon relative to that of a free proton, R=(3.707219/spl plusmn/0.000048)/spl times/10/sup -3/, is in good agreement with the previous CERN measurements for /spl mu//sup +/ and /spl mu//sup -/, and has approximately the same uncertainty as each of these measurements. In spring 1998 a muon kicker was installed and successfully tested in the storage ring magnet and a significant improvement in the knowledge of the muon g-factor is expected from upcoming runs in August 1998 and January 1999.

Published
1999
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8. Status of the g-2 experiment at BNL

Author

D. Kawall, V. B. Golubev, S. Kurokawa, E. P. Solodov, B. J. Hughes, G. Bunce, P. Cushman, P. von Walter, R. M. Carey, A. Stillman, P. T. Debevec, Y.Y. Lee, J. W. Jackson, G.V. Fedotovich, Louis Snydstrup, F. Toldo, A.G. Chertovskikh, Rasmus Larsen, H. Hirabayashi, J. Cullen, M. F. Hare, O. Rind, H. Deng, D. von Lintig, E. Benedict, D. Urner, David Miller, Alexei Trofimov, X. Fei, J. Benante, A. Disco, D. Winn, A. Soukas, E. Efstathiadis, F. J. M. Farley, Yannis K. Semertzidis, R. Prigl, H. N. Brown, R. McNabb, O. N. Ryskulov, Yuri Shatunov, C. Timmermans, Jinsong Ouyang, J. Geller, William Deninger, G. zu Putlitz, S. I. Redin, M. Tanaka, K. Woodle, C. Poly, E. Hazen, B. Bunker, C. Pearson, Y. Mizumachi, M. Grosse Perdekamp, H. E. Ahn, Ulrich Haeberlen, J. Pretz, K. Endo, D. Zimmerman, V. Monich, L. Jia, G. T. Danby, R. P. Shutt, J. Kindem, William Morse, T. D. Jones, A. Maskimov, L. Duong, H. Hseuh, V. P. Druzhinin, S. I. Serednyakov, F. Krienen, Wuzheng Meng, B.I. Khazin, C. Pai, Yuri F. Orlov, Michael A. Green, W. Earle, M. Mapes, A. Grossmann, V. W. Hughes, D. Warbuton, Yu Merzliakov, I. Polk, Satish Dhawan, J. Gerhaeuser, W. A. Worstell, S. Kochis, J. P. Miller, B. L. Roberts, Klaus-Peter Jungmann, Masahiko Iwasaki, J. Sandberg, S. Sedykh, S. Rankowitz, D.H Brown, D. N. Grigorev, I. Logashenko, G. S. Varner, D. W. Hertzog, A. Yamamoto, T. Tallerico, S. Giron, L. R. Sulak, and Precision Frontier

Subjects
Physics, Nuclear and High Energy Physics, Particle physics, Large Hadron Collider, Muon, Meson, Anomalous magnetic dipole moment, Physics::Instrumentation and Detectors, MUON, Atomic and Molecular Physics, and Optics, Nuclear physics, Pion, DIPOLE-MOMENT, Antimatter, Physics::Accelerator Physics, High Energy Physics::Experiment, ANOMALOUS MAGNETIC-MOMENT, Storage ring, Lepton
Abstract

The muon g-2 experiment at Brookhaven has successfully completed two exploratory runs using pion injection and direct muon injection for checkout and initial data taking. The main components of the experiment, which include the pion beam line, the superconducting storage ring and inflector magnets, the muon kicker and the lead-scintillating fiber calorimeters have been satisfactorily commissioned. First results on the anomalous magnetic moment of the positive muon from pion injection are in good agreement with previous experimental results for a(mu+) and a(mu-) from CERN and of comparable accuracy (13 ppm). Analysis of the 1998 muon injection run is in progress and expected to improve the precision to about 4 ppm. A first production run is scheduled for January 1999 with the goal of reaching the 1 ppm error level.

Published
1999
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9. Improved limit on the muon electric dipole moment

Author

L. Duong, Rasmus Larsen, H. Deng, Yannis K. Semertzidis, C. J. G. Onderwater, D. Winn, Satish Dhawan, J. M. Paley, C. Timmermans, M. Sossong, J. Pretz, G.V. Fedotovich, M. Deile, P. M. Shagin, Yu. M. Shatunov, J. P. Miller, T. Qian, F. Krienen, X. Huang, G. T. Danby, N.M. Ryskulov, B. L. Roberts, P. Cushman, R. Prigl, J. Mi, V. P. Druzhinin, Yuri F. Orlov, R. McNabb, D. Kawall, Wuzheng Meng, Y. Mizumachi, S. Sedykh, D. Urner, I. Kronkvist, D. Nikas, D. Zimmerman, M. Grosse-Perdekamp, Q. Peng, J. Kindem, B. Bousquet, E. P. Sichtermann, M. F. Hare, D.N. Grigoriev, C. C. Polly, H. N. Brown, Klaus-Peter Jungmann, E. P. Solodov, O. Rind, G. Bunce, A. Lam, I. Logashenko, D. W. Hertzog, P. von Walter, A. Grossmann, Y.Y. Lee, Masahiko Iwasaki, B.I. Khazin, Frederick Gray, William Deninger, M. Kawamura, D. Warburton, V. W. Hughes, Lawrence Sulak, G. W. Bennett, Alexei Trofimov, E. Efstathiadis, A. Steinmetz, William Morse, F. J. M. Farley, G. zu Putlitz, S. I. Redin, R. M. Carey, A. Yamamoto, C. S. Özben, S. Giron, P. T. Debevec, and Research unit Nuclear & Hadron Physics

Subjects
Physics, Nuclear and High Energy Physics, Muon, Anomalous magnetic dipole moment, Physics::Instrumentation and Detectors, POSITIVE MUON, G-2, FOS: Physical sciences, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Electric dipole moment, Precession, Physics::Accelerator Physics, High Energy Physics::Experiment, Combined result, Limit (mathematics), ANOMALOUS MAGNETIC-MOMENT, Spin (physics), Storage ring
Abstract

Three independent searches for an electric dipole moment (EDM) of the positive and negative muons have been performed, using spin precession data from the muon g-2 storage ring at Brookhaven National Laboratory. Details on the experimental apparatus and the three analyses are presented. Since the individual results on the positive and negative muon, as well as the combined result, d=-0.1(0.9)E-19 e-cm, are all consistent with zero, we set a new muon EDM limit, |d| < 1.9E-19 e-cm (95% C.L.). This represents a factor of 5 improvement over the previous best limit on the muon EDM., 19 pages, 15 figures, 7 tables

Published
2009

10. A Field-Deployable Dual-Wavelength Fiber-Optic pH Sensor Instrument Based on Solid-State Optical and Electrical Components

Author

Marc D. Porter, William Deninger, Shelley J. Coldiron, and Thomas P. Jones

Subjects
Optical fiber, business.industry, Chemistry, 010401 analytical chemistry, Detector, Photometer, 010402 general chemistry, 01 natural sciences, Cellulose acetate film, 0104 chemical sciences, law.invention, Optics, law, Fiber optic sensor, business, Instrumentation, Refractive index, Spectroscopy, Beam splitter, Light-emitting diode
Abstract

The construction, operation, and performance characteristics of a compact, dual-wavelength, solid-state photometer and fiber-optic probe for use with absorbance-based thin-film chemical sensors are described. The instrument has been specifically designed for field deployment and uses low-cost components while maintaining a precision and accuracy comparable to fluorescence-based laboratory sensors. The computer-controlled photometer employs red and green light-emitting diodes (LEDs) as fixed-wavelength light sources and silicon photodiodes as detectors, and has no moving parts. Graded refractive index lenses control light propagation through a beamsplitter in the photometer and through the fiber-optic probe. The beamsplitter directs light simultaneously onto a sample and a reference detector in a double-beam in-space mode which compensates for fluctuations in the outputs of the LEDs. A chemically modified polymeric film is mounted on the fiber probe, and serves as an optical pH sensor. The previously described sensing film is constructed by the immobilization of the diprotic acid-base indicator Congo Red at a base-hydrolyzed cellulose acetate film and responds to changes in pH between 0 and 4.2. An absorbance-based internal calibration scheme, which takes advantage of the optical properties of each of the reactive forms of the immobilized indicator, is presented. The potential capability of this instrumentation, based on its small size and minimal need for calibration, to function as a durable low-maintenance pH sensor for on-site deployment in environmental monitoring applications, is discussed.

Published
1991
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11. Search for Lorentz and CPT violation effects in muon spin precession

Author

A. Lam, G. T. Danby, I. Logashenko, V. P. Druzhinin, Frederick Gray, A. Grossmann, F. Krienen, E. P. Sichtermann, M. F. Hare, G. Bunce, L. Duong, Satish Dhawan, O. Rind, Wuzheng Meng, William Deninger, B.I. Khazin, D. Urner, Lawrence Sulak, J. P. Miller, H. N. Brown, P. Cushman, M. Kawamura, S. Sedykh, P. T. Debevec, F. J. M. Farley, Q. Peng, M. Sossong, B. L. Roberts, D. Nikas, I. Kronkvist, C. S. Özben, G. zu Putlitz, A. Yamamoto, S. I. Redin, J. Kindem, X. Huang, M. Grosse-Perdekamp, D. Warburton, D. Zimmerman, J. Pretz, Yu. M. Shatunov, C. C. Polly, J. M. Paley, D. W. Hertzog, Yuri F. Orlov, D. Kawall, E. P. Solodov, B. Bousquet, N.M. Ryskulov, R. M. Carey, C. J. G. Onderwater, S. Giron, R. Prigl, J. Mi, Y. Mizumachi, V. W. Hughes, T. Qian, G. W. Bennett, C. Timmermans, R. McNabb, William Morse, G.V. Fedotovich, Alexei Trofimov, E. Efstathiadis, A. Steinmetz, Y.Y. Lee, D.N. Grigoriev, P. von Walter, Rasmus Larsen, H. Deng, D. Winn, Yannis K. Semertzidis, M. Deile, P. M. Shagin, Klaus-Peter Jungmann, Masahiko Iwasaki, and KVI - Center for Advanced Radiation Technology

Subjects
Larmor precession, Physics, Particle physics, Muon, Anomalous magnetic dipole moment, CPT symmetry, VALUES, SYMMETRY, HIGHER-DIMENSIONAL THEORIES, General Physics and Astronomy, Muon spin spectroscopy, Omega, STRINGS, INVARIANCE, Standard Model, High Energy Physics - Experiment, High Energy Physics - Phenomenology, TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY, High Energy Physics::Experiment, ANOMALOUS MAGNETIC-MOMENT, SPACED DATA, Spin-½
Abstract

The spin precession frequency of muons stored in the $(g-2)$ storage ring has been analyzed for evidence of Lorentz and CPT violation. Two Lorentz and CPT violation signatures were searched for: a nonzero $\Delta\omega_{a}$ (=$\omega_{a}^{\mu^{+}}-\omega_{a}^{\mu^{-}}$); and a sidereal variation of $\omega_{a}^{\mu^{\pm}}$. No significant effect is found, and the following limits on the standard-model extension parameters are obtained: $b_{Z} =-(1.0 \pm 1.1)\times 10^{-23}$ GeV; $(m_{\mu}d_{Z0}+H_{XY}) = (1.8 \pm 6.0 \times 10^{-23})$ GeV; and the 95% confidence level limits $\check{b}_{\perp}^{\mu^{+}}< 1.4 \times 10^{-24}$ GeV and $\check{b}_{\perp}^{\mu^{-}} < 2.6 \times 10^{-24}$ GeV., Comment: 5 pages, 3 figures, submitted to Physical Review Letters, Modified to answer the referees suggestions

Published
2008

12. Final report of the E821 muon anomalous magnetic moment measurement at BNL

Author

E. P. Sichtermann, M. F. Hare, X. Huang, D. W. Hertzog, P. T. Debevec, C. S. Özben, Frederick Gray, L. R. Sulak, O. Rind, A. Yamamoto, A. Lam, I. Logashenko, C. J. G. Onderwater, L. Duong, B. Bousquet, P. von Walter, H. N. Brown, E. P. Solodov, J. M. Paley, S. K. Dhawan, Yuri F. Orlov, M. Sossong, G. T. Danby, I. Kronkvist, Klaus-Peter Jungmann, S. Giron, R. M. Carey, D. Kawall, Yu. M. Shatunov, Masahiko Iwasaki, D. Urner, J. Pretz, Y. Mizumachi, S. Sedykh, T. Qian, F. J. M. Farley, J. P. Miller, M. Grosse-Perdekamp, D. Nikas, C. Timmermans, D.N. Grigoriev, G.V. Fedotovich, G. zu Putlitz, S. I. Redin, V. P. Druzhinin, B. L. Roberts, P. Cushman, Rasmus Larsen, B.I. Khazin, D. Zimmerman, M. Kawamura, H. Deng, G. W. Bennett, D. Winn, C. C. Polly, N.M. Ryskulov, J. Kindem, F. Krienen, R. Prigl, J. Mi, R. McNabb, William Deninger, Wuzheng Meng, Y. Y. Lee, Gerry Bunce, William Morse, M. Deile, P. M. Shagin, Alexei Trofimov, E. Efstathiadis, A. Steinmetz, Yannis K. Semertzidis, A. Grossmann, D. Warburton, Q. Peng, Vernon W. Hughes, and Research unit Nuclear & Hadron Physics

Subjects
Physics, HADRONIC CONTRIBUTIONS, Nuclear and High Energy Physics, Particle physics, Large Hadron Collider, Muon, Anomalous magnetic dipole moment, G-2 EXPERIMENT, SCATTERING CONTRIBUTION, Hadron, E(+)E(-) ANNIHILATION, ELECTROMAGNETIC INTERACTIONS, Standard deviation, Standard Model, Nuclear physics, BOHR MAGNETONS, BY-LIGHT CONTRIBUTION, High Energy Physics::Experiment, Vacuum polarization, STORAGE-RING MAGNET, PRECISE MEASUREMENT, Anomaly (physics), ELECTROWEAK CORRECTIONS
Abstract

We present the final report from a series of precision measurements of the muon anomalous magnetic moment, a(mu)=(g-2)/2. The details of the experimental method, apparatus, data taking, and analysis are summarized. Data obtained at Brookhaven National Laboratory, using nearly equal samples of positive and negative muons, were used to deduce a(mu)(Expt)=11659208.0(5.4)(3.3)x10(-10), where the statistical and systematic uncertainties are given, respectively. The combined uncertainty of 0.54 ppm represents a 14-fold improvement compared to previous measurements at CERN. The standard model value for a(mu) includes contributions from virtual QED, weak, and hadronic processes. While the QED processes account for most of the anomaly, the largest theoretical uncertainty, approximate to 0.55 ppm, is associated with first-order hadronic vacuum polarization. Present standard model evaluations, based on e(+)e(-) hadronic cross sections, lie 2.2-2.7 standard deviations below the experimental result.

Published
2006

13. Liner compression and instabilities and shocks at high currents with the Pegasus and Ranchero sources

Author

J.L. Stokes, James H. Goforth, C.E. Findley, E.A. Lopez, B. Carpenter, William Deninger, J. Lynch, Henn Oona, T.J. Herrera, D.V. Morgan, Douglas G. Tasker, E. Chandler, and David M. Oro

Subjects
Physics, Argon, Explosive material, Electric shock, business.industry, Pulse generator, Electrical engineering, Implosion, chemistry.chemical_element, medicine.disease, Instability, law.invention, Capacitor, Optics, chemistry, law, medicine, Ampere, business
Abstract

We have done implosion experiments with cylindrical liners at currents ranging from 3 to 25 million amperes (MA). The low current (3-6 MA) experiments are done at the Pegasus capacitor bank facility and the high current (/spl sim/25 MA) ones are done with an explosive flux compression generator (Ranchero) in Ancho canyon at Los Alamos. Visible light and X-ray images provide details of the implosion but provide different results in both axial and radial views. Axial views taken with visible light framing cameras show that measurements of shock front velocity in imploding gas filled (Xe or Ar) aluminum liners appear to be different. Also, axial X-ray images give different shock velocities. Radial views show significant material "blow-off" as seen with the visible light framing camera. This paper discusses these differences and how they effect the hydrodynamics and instability growth in liner implosions. They also discuss the details of the diagnostic techniques that are necessary in this harsh experimental environment.

Published
2003
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14. RANCHERO explosive pulsed power experiments

Author

H.D. Anderson, D.H. Herrera, F.C. Sena, W. Broste, L.J. Tabaka, William Deninger, D.A. Clark, J.L. Stokes, J.C. King, Robert E. Reinovsky, J. Bartos, J.R. Lindemuth, W. A. Anderson, J. B. Johnson, D.T. Torres, E. Armijo, R.K. Keinigs, Douglas G. Tasker, E.A. Lopez, E.C. Martinez, J.V. Parker, Walter L. Atchison, R.J. Faehl, David M. Oro, D.L. Martinez, O.F. Garcia, C.M. Fowler, Randall B. Randolph, Henn Oona, T.J. Herrera, George Rodriguez, James H. Goforth, F. Garcia, D.V. Morgan, A. J. Taylor, R. D. Day, and J.A. McGuire

Subjects
Engineering, Explosive material, business.industry, Stator, Pulse generator, Nuclear engineering, Electrical engineering, Power factor, Pulsed power, law.invention, Capacitor, law, Coaxial, business, Armature (electrical engineering)
Abstract

The authors are developing the RANCHERO high explosive pulsed power (HEPP) system to power cylindrically imploding solid-density liners for hydrodynamics experiments. Their near-term goal is to conduct experiments in the regime pertinent to the Atlas capacitor bank. That is, they will attempt to implode liners of /spl sim/50 g mass at velocities approaching 15 km/sec. The basic building block of the HEPP system is a coaxial generator with a 304.8 mm diameter stator, and an initial armature diameter of 152 mm. The armature is expanded by a high explosive (HE) charge detonated simultaneously along its axis. The authors have reported a variety of experiments conducted with generator modules 43 cm long and have presented an initial design for hydrodynamic liner experiments. In this paper, they give a synopsis of their first system test, and a status report on the development of a generator module that is 1.4 m long.

Published
2003
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15. New studies of explosively formed fuse opening switches

Author

D.H. Herrera, S.P. Marsh, Henn Oona, J.C. King, G.F. Kiuttu, D.T. Torres, D. G. Tasker, William Deninger, James H. Degnan, E.A. Lopez, C.E. Findley, and James H. Goforth

Subjects
Fuse (automotive), Materials science, Explosive material, business.industry, Optoelectronics, Implosion, Superconducting magnetic energy storage, Plasma, business, Electrical conductor, Die (integrated circuit), Conductor
Abstract

Summary form only given, as follows. Explosively formed fuse opening switches have been developed for applications in high-energy explosive pulsed power systems. An explosive charge forces the electrical conductor across a Teflon(R) forming die. The switch thus combines the action of the explosively driven mechanical deformation and electrical fusing of the conductor. Such switches have operated at power levels up to 6 TW in systems with 18 MJ stored energy, allowing currents of up to 20 MA to be delivered to 15 nH loads on time scales of a few /spl mu/s. These devices were developed to power plasma or solid cylindrical implosion loads. In recent tests we have explored a wider range of parameter space than previously accessed, allowing the consideration of more compact designs with more flexible applications. The combined effects of explosive power and electrical conduction through the explosive products have been studied, and this leads to the choice of better explosives. Experiments conducted in small planar assemblies will be described, and the implications for small diameter cylindrical assemblies. Switches opening on a 1 to 10 /spl mu/s time scale with resistances starting at 50 /spl mu//spl Omega/ and increasing to perhaps 1 /spl Omega/ now seem possible to construct, using explosive charges as small as a few pounds: in initial experiments, using cylindrical switches of 10 cm diameter and 43 cm length, the switches interrupted currents of approximately 3 MA producing 200 kV.

Published
2002
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16. Experimental results from a dynamic magnetic field controlled ion ring

Author

B.L. Freeman, John Greenly, A. Luginbill, William Deninger, J. Shannon, S. Glidden, R.J. Faehl, Henn Oona, Pharis E. Williams, and James C. Rock

Subjects
Physics, Nuclear magnetic resonance, Optics, Ion beam, business.industry, Magnet, Vacuum chamber, Coaxial, business, Diode, Voltage, Magnetic field, Ion
Abstract

Summary form only given. Project TedibeAr is a scientific experimental study to demonstrate the feasibility of dynamically controlling and accelerating an intense ion ring. The ion pulse from a magnetically insulated ion diode is injected through a full-cusp magnetic field into an axial guide field. The coils for this magnetic field are located internal to the vacuum chamber, so the field as a function of time can be dynamically altered. The Marx driver for the ion diode has a maximum open circuit voltage of /spl sim/1 MV. Beams with energies of about 300-400 kV have been studied. The source for the axial, guide magnetic field is a capacitor bank with about 4 mF. This subsystem stores /spl sim/1 MJ at 22 kV and delivers its current through 32, 3.6 m YK-198 coaxial cables to the magnet coils. The guide field is about 12-14 kgauss to control an ion ring with a maximum diameter of /spl sim/20 cm. Present experiments are measuring the performance of the ion diode and the conversion of the ion beam into a ring through the cusp magnetic field.

Published
2002
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17. Publisher’s Note: Measurement of the Positive Muon Anomalous Magnetic Moment to 0.7 ppm [Phys. Rev. Lett.89, 101804 (2002)]

Author

D. Warburton, M. Grosse-Perdekamp, X. Huang, M. Sossing, Rasmus Larsen, H. Deng, Alexei Trofimov, E. Efstathiadis, A. Steinmetz, D.N. Grigoriev, G. W. Bennett, Yuri F. Orlov, G. T. Danby, P. von Walter, A. Lam, F. Krienen, V. W. Hughes, William Morse, O. Rind, J. M. Paley, G.V. Fedotovich, C. Ozben, D. Urner, P. Cushman, Yu. M. Shatunov, H. N. Brown, C. C. Polly, S. Giron, Wuzheng Meng, V. P. Druzhinin, J. Pretz, F. J. M. Farley, T. Qian, I. Kronkvist, R. M. Carey, S.I. Redin, B. I. Khazin, E. P. Solodov, C. J. G. Onderwater, G. zu Putlitz, N.M. Ryskulov, D. W. Hertzog, Y.Y. Lee, Klaus-Peter Jungmann, G. Bunce, J. P. Miller, R. Prigl, L. R. Sulak, Masahiko Iwasaki, B. L. Roberts, E. P. Sichtermann, M. F. Hare, William Deninger, A. Grossmann, Yannis K. Semertzidis, I.B. Logashenko, D. Nikas, D. Kawall, J. Kindem, M. Deile, L. Duong, P. M. Shagin, J. Mi, B. Bousquet, R. McNabb, F. Gray, Satish Dhawan, P. T. Debevec, A. Yamamoto, and Q. Peng

Subjects
Physics, Muon, Anomalous magnetic dipole moment, Neutron magnetic moment, Condensed matter physics, Proton magnetic moment, Nuclear magnetic moment, General Physics and Astronomy, Magnetic dipole, Electron magnetic dipole moment, Spin magnetic moment
Published
2002
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18. Precise measurement of the positive muon anomalous magnetic moment

Author

F. Krienen, Klaus-Peter Jungmann, Masahiko Iwasaki, E. P. Solodov, J. P. Miller, M. Sossong, R. M. Carey, G. T. Danby, P. Cushman, Yuri F. Orlov, J. M. Paley, Vernon W. Hughes, W. M. Morse, J. Pretz, C. J. G. Onderwater, V. P. Druzhinin, H. N. Brown, B. L. Roberts, E. P. Sichtermann, M. F. Hare, S. Sedykh, O. Rind, D.N. Grigoriev, William Deninger, Alexei Trofimov, P. T. Debevec, A. Steinmetz, C. S. Özben, M. Deile, I. Logashenko, P. von Walter, Rasmus Larsen, H. Deng, L. Duong, A. Grossmann, D. Zimmerman, D. Winn, A. Yamamoto, W. Meng, C. C. Polly, B.I. Khazin, M. Kawamura, J. Kindem, S. K. Dhawan, Yannis K. Semertzidis, Yu. M. Shatunov, D. Urner, D. Warburton, D. Kawall, D. Nikas, C. Timmermans, Lawrence Sulak, M. Grosse-Perdekamp, F. J. M. Farley, G. zu Putlitz, S. Giron, S. I. Redin, R. Prigl, J. Mi, R. McNabb, G.V. Fedotovich, E. Efstathiadis, I. Kronkvist, N.M. Ryskulov, Gerry Bunce, D. W. Hertzog, Frederick Gray, and Y. Y. Lee

Subjects
Physics, Cross-section, Muon, Anomalous magnetic dipole moment, General Physics and Astronomy, FOS: Physical sciences, E(+)e(-) annihilation, Alternating Gradient Synchrotron, Dipole-moment, (g-2)(mu), Nmr, Standard Model, Magnetic field, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex)
Abstract

A precise measurement of the anomalous g value, a_mu=(g-2)/2, for the positive muon has been made at the Brookhaven Alternating Gradient Synchrotron. The result a_mu^+=11 659 202(14)(6) X 10^{-10} (1.3 ppm) is in good agreement with previous measurements and has an error one third that of the combined previous data. The current theoretical value from the standard model is a_mu(SM)=11 659 159.6(6.7) X 10^{-10} (0.57 ppm) and a_mu(exp)-a_mu(SM)=43(16) X 10^{-10} in which a_mu(exp) is the world average experimental value., 5 pages and 5 figures. Submitted to Physical Review Letters

Published
2001

19. The Brookhaven muon storage ring magnet

Author

Yu. M. Shatunov, P. von Walter, A. Yamamoto, M. Mapes, J. P. Miller, D. W. Hertzog, L. Jia, V. W. Hughes, H. N. Brown, W. Meng, H. Hirabayashi, W. A. Worstell, A. Disco, M. O'Toole, D. Urner, A. Soukas, F. Krienen, Rasmus Larsen, Y. Y. Lee, William Morse, J. Kindem, P. T. Debevec, X. Fei, D. Winn, L. Addessi, S. Kochis, I. Polk, D. Kawall, S. Giron, J. Benante, Jinsong Ouyang, Stanislav Serednyakov, E. Hazen, F. J. M. Farley, R. P. Shutt, S. K. Dhawan, Y. Mizumachi, L. R. Sulak, G. zu Putlitz, S. I. Redin, D. N. Grigorev, R. E. Meier, H. Hseuh, R. Prigl, C. Timmermans, J. Geller, M. A. Green, G.V. Fedotovich, J. W. Jackson, G. Bunce, J. Cullen, David Miller, Yuri F. Orlov, T. Tallerico, M. Grosse-Perdekamp, W. Earle, B.I. Khazin, C. Pai, Z. Armoza, S. Sedykh, D. Koniczny, William Deninger, K. Woodle, E. P. Solodov, R. M. Carey, Louis Snydstrup, J. C. Cottingham, A. Grossmann, P. Cushman, F. Toldo, N.M. Ryskulov, K. Endo, D. Zimmerman, Ulrich Haeberlen, G. T. Danby, V. P. Druzhinin, B. L. Roberts, D. von Lintig, Yannis K. Semertzidis, and Klaus-Peter Jungmann

Subjects
Physics, Nuclear and High Energy Physics, Muon, large superconducting coils, Niobium-titanium, storage ring, Superconducting magnet, Cryogenics, muon g-2, Magnetic field, Nuclear physics, Magnet, superconducting magnet, Instrumentation, Excitation, Storage ring
Abstract

The muon g-2 experiment at Brookhaven National Laboratory has the goal of determining the muon anomalous g-value a(mu) ( = (g - 2)/2) to the very high precision of 0.35 parts per million and thus requires a storage ring magnet with great stability and homogeniety. A superferric storage ring with a radius of 7.11 m and a magnetic field of 1.45 T has been constructed in which the field quality is largely determined by the iron, and the excitation is provided by superconducting coils operating at a current of 5200 A. The storage ring has been constructed with maximum attention to azimuthal symmetry and to tight mechanical tolerances and with many features to allow obtaining a homogenous magnetic field. The fabrication of the storage ring, its cryogenics and quench protection systems, and its initial testing and operation are described. (C) 2001 Elsevier Science B.V. All rights reserved.

Published
2001

20. The muon anomalous magnetic moment

Author

D. W. Hertzog, J. P. Miller, B. L. Roberts, E. Hazen, M. Grosse-Perdekamp, Rasmus Larsen, H. Deng, O. Rind, D. Winn, G. T. Danby, J. Kindem, Yuri F. Orlov, A. Yamamoto, Yu. M. Shatunov, F. Krienen, C. Timmermans, G.V. Fedotovich, W. Earle, P. Cushman, C. Ozben, C. J. G. Onderwater, Vernon W. Hughes, Satish Dhawan, M. Sossong, Wuzheng Meng, V. P. Druzhinin, B. I. Khazin, M. Kawamura, D. Urner, Klaus-Peter Jungmann, D. Warburton, William Morse, J. Pretz, D. Zimmerman, I. Kronkvist, Gerry Bunce, Alexei Trofimov, C. Pai, S.I. Redin, E. Efstathiadis, A. Steinmetz, M. Iwasake, V. W. Hughes, C. C. Polly, P. T. Debevec, H. Brown, N.M. Ryskulov, A. Grossmann, L. Duong, S. Sedykh, D. Kawall, Yannis K. Semertzidis, William Deninger, M. F. Hare, Ulrich Haeberlen, I.B. Logashenko, E. P. Solodov, R. M. Carey, Y.Y. Lee, R. Prigl, J. M. Paley, J. Mi, R. McNabb, F. Gray, P. von Walter, F. J. M. Farley, G. zu Putlitz, L. R. Sulak, and S. Giron

Subjects
Physics, Nuclear physics, Particle physics, Muon, Anomalous magnetic dipole moment, Magnetic moment, Gyromagnetic ratio, Statistical error, National laboratory, Standard Model
Abstract

The muon g-2 experiment at the Brookhaven National Laboratory is described, including its motivation, goal and present status. The latest result based on 1998 data is aμ+=g−2/2=11 659 191(59)×10−10 (5 ppm), where the error is primarily statistical. This value agrees with the present theoretical value. Data obtained thus far and now being analyzed should have a statistical error of about 0.5 ppm.

Published
2001
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21. Testing CPT and Lorentz Invariance with the Anomalous Spin Precession of the Muon

Author

F. Gray, D. Kawall, N.M. Ryskulov, C. J. G. Onderwater, Yu. M. Shatunov, Satish Dhawan, S. Sedykh, J. M. Paley, William Morse, E. P. Sichtermann, M. F. Hare, J. P. Miller, B. L. Roberts, S. Giron, Alexei Trofimov, E. Efstathiadis, A. Steinmetz, M. Grosse-Perdekamp, F. Krienen, O. Rind, I. Kronkvist, M. Deile, I.B. Logashenko, D. Nikas, M. Kawamura, S.I. Redin, E. P. Solodov, J. Kindem, P. Cushman, Wuzheng Meng, L. R. Sulak, Y.Y. Lee, R. Prigl, D. Warburton, J. Mi, A. Grossmann, R. McNabb, Rasmus Larsen, H. Deng, H. Brown, C. Ozben, Yuri F. Orlov, D. Winn, Yannis K. Semertzidis, G.V. Fedotovich, G. T. Danby, B. I. Khazin, V. P. Druzhinin, Klaus-Peter Jungmann, Masahiko Iwasaki, G. Bunce, D. Urner, M. Sossong, F. J. M. Farley, J. Pretz, G. zu Putlitz, D. Zimmerman, C. C. Polly, D. W. Hertzog, L. Duong, William Deninger, V. W. Hughes, C. Timmermans, R. M. Carey, D.N. Grigoriev, P. von Walter, M. Baak, P. T. Debevec, and A. Yamamoto

Subjects
Physics, High Energy Physics - Experiment (hep-ex), Muon, High energy accelerator, FOS: Physical sciences, High Energy Physics::Experiment, Lorentz covariance, National laboratory, High Energy Physics - Experiment, Mathematical physics
Abstract

This article discusses tests of CPT and Lorentz invariance with data from the muon g-2 experiment at Brookhaven National Laboratory. According to an extension of the Standard Model by Kostelecky et al., CPT/Lorentz violating terms in the Lagrangian induce a shift of the anomaly frequency omega_a of muons in a magnetic field. This shift is predicted to be different for positive and negative muons and to oscillate with the Earth's sidereal frequency. We discuss the sensitivity of the g-2 experiment to different parameters of this Standard Model extension and propose an analysis method to search for sidereal variations of omega_a., Comment: 6 pages; contribution to the proceedings of CPT '01 (Second Meeting on CPT and Lorentz Symmetry; August 15-18, 2001; Indiana University, Bloomington)

Published
2001
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22. The muon anomalous magnetic moment experiment at Brookhaven

Author

C. J. G. Onderwater, J. P. Miller, E. Hazen, Alexei Trofimov, B. L. Roberts, E. Efstathiadis, A. Steinmetz, V. W. Hughes, A. Yamamoto, Y. K. Semertzidis, P. T. Debevec, D. Nikas, M. Sossong, J. Kindem, L. R. Sulak, Satish Dhawan, Rasmus Larsen, H. Deng, D. W. Hertzog, J. Pretz, D. Winn, M. Grosse Perdekamp, Yu. M. Shatunov, O. Rind, D. Warburton, F. Krienen, M. Kawamura, F. J. M. Farley, William Morse, C. Timmermans, C. Pai, J. M. Paley, G. zu Putlitz, Wen Liu, D. Urner, Yuri F. Orlov, L. Duong, Wuzheng Meng, G.V. Fedotovich, W. Earle, G. Bunce, F. Gray, S. Giron, P. Cushman, S. Sedykh, N.M. Ryskulov, Ulrich Haeberlen, A. Grossmann, D. Zimmerman, G. T. Danby, C. C. Polly, V. P. Druzhinin, H. Brown, William Deninger, Yannis K. Semertzidis, R. M. Carey, E. P. Sichtermann, M. F. Hare, P. von Walter, I.B. Logashenko, D. Kawall, E. P. Solodov, J. Mi, R. McNabb, Y.Y. Lee, R. Prigl, C. Ozben, I. Kronkvist, S.I. Redin, B. I. Khazin, Klaus-Peter Jungmann, and Masahiko Iwasaki

Subjects
Nuclear physics, Physics, Particle physics, Muon, Neutron magnetic moment, Anomalous magnetic dipole moment, Proton magnetic moment, g-factor, Standard Model
Published
2001
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23. Improved measurement of the positive muon anomalous magnetic moment

Author

D. W. Hertzog, Frederick Gray, B.I. Khazin, M. F. Hare, M. Kawamura, C. Pai, Lawrence Sulak, P. T. Debevec, D. Warburton, Yuri F. Orlov, S. Giron, W. M. Morse, W. Earle, G. Bunce, Yannis K. Semertzidis, G.V. Fedotovich, I. Logashenko, C. S. Özben, A. Yamamoto, P. von Walter, P. Cushman, F. J. M. Farley, J. Kindem, I. Kronkvist, Alexei Trofimov, GZ Putlitz, V. W. Hughes, Ulrich Haeberlen, F. Krienen, A. Steinmetz, Klaus-Peter Jungmann, Y. Y. Lee, Yu. M. Shatunov, G. T. Danby, D. Kawall, S. I. Redin, Masahiko Iwasaki, R. Prigl, J. Mi, O. Rind, R. McNabb, L. Duong, H. N. Brown, V. P. Druzhinin, B. L. Roberts, Cjg Onderwater, S. Sedykh, W. Meng, M. Sossong, E. Hazen, J. Pretz, N.M. Ryskulov, M. Grosse-Perdekamp, J. M. Paley, C. Timmermans, J. P. Miller, Rasmus Larsen, H. Deng, D. Winn, A. Grossmann, E. P. Solodov, R. M. Carey, S. K. Dhawan, D. Urner, D. Zimmerman, C. C. Polly, William Deninger, and E. Efstathiadis

Subjects
Larmor precession, Physics, Nuclear and High Energy Physics, Angular frequency, Muon, Anomalous magnetic dipole moment, Proton, FOS: Physical sciences, Alternating Gradient Synchrotron, Omega, High Energy Physics - Experiment, Nuclear physics, High Energy Physics - Experiment (hep-ex), Physics::Accelerator Physics, Spin (physics)
Abstract

A new measurement of the positive muon's anomalous magnetic moment has been made at the Brookhaven Alternating Gradient Synchrotron using the direct injection of polarized muons into the superferric storage ring. The angular frequency difference omega_{a} between the angular spin precession frequency omega_{s} and the angular orbital frequency omega_{c} is measured as well as the free proton NMR frequency omega_{p}. These determine R = omega_{a} / omega_{p} = 3.707~201(19) times 10^{-3}. With mu_{mu} / mu_{p} = 3.183~345~39(10) this gives a_{mu^+} = 11~659~191(59) times 10^{-10} (pm 5 ppm), in good agreement with the previous CERN and BNL measurements for mu^+ and mu^-, and with the standard model prediction., 4 pages, 4 figures. accepted for publication in Phys. Rev. D62 Rapid Communications

Published
2000

24. Recent results on the muon anomalous magnetic moment from BNL E821

Author

J. P. Miller, O. Rind, B. L. Roberts, F. Gray, D. Kawall, J. Pretz, H. Brown, J. M. Paley, L. Duong, S. Giron, V. W. Hughes, Yannis K. Semertzidis, F. Krienen, J. Kindem, D. Warburton, P. T. Debevec, William Deninger, L. R. Sulak, M. Grosse-Perdekamp, C. Timmermans, J. Mi, A. Yamamoto, Yu. M. Shatunov, E. Hazen, Rasmus Larsen, R. McNabb, N.M. Ryskulov, Wuzheng Meng, H. Deng, D. W. Hertzog, Satish Dhawan, I.B. Logashenko, D. Winn, R. M. Carey, S. Sedykh, C. Pai, A. Grossmann, Ulrich Haeberlen, Alexei Trofimov, E. Efstathiadis, A. Steinmetz, B. I. Khazin, D. Zimmerman, C. Ozben, G. T. Danby, C. C. Polly, V. P. Druzhinin, Klaus-Peter Jungmann, E. P. Solodov, G. Bunce, Y.Y. Lee, R. Prigl, Yuri F. Orlov, P. Cushman, G.V. Fedotovich, W. Earle, D. Urner, William Morse, C. J. Gerco Onderwater, I. Kronkvist, S.I. Redin, Robert Sanders, F. J. M. Farley, and G. zu Putlitz

Subjects
Nuclear physics, Physics, Particle physics, Muon, Anomalous magnetic dipole moment, Anomaly (physics), Remainder, Spin (physics), Magnetic field
Abstract

The new muon (g−2) experiment at BNL aims at a final precision of 0.35 ppm on the muon anomaly. The experiment has completed four runs beginning in 1997 and has sub-ppm data on tape. Analyzed data include a published 13 ppm result from our initial commissioning run and a recently completed 5 ppm result from our 1998 initial muon injection run. We are actively working on the remainder of the data analysis and on systematic studies.

Published
2000
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25. First results from the new muon (g-2) experiment

Author

P. Cushman, E. Hazen, William Morse, M. Tanaka, S. Sedykh, L. R. Sulak, F. J. M. Farley, Yuri F. Orlov, L. Duong, J. Kindem, D. Kawall, P. Neumayer, P. V. Walter, N.M. Ryskulov, G. zu Putlitz, I. Kronkvist, G.V. Fedotovich, F. Krienen, W. Earle, D. Warburton, P. T. Debevec, M. Sossong, M. Grosse Perdekamp, Yu. M. Shatunov, S.I. Redin, Stanislav Serednyakov, H. Brown, A. Yamamoto, M. Kawamura, E. P. Solodov, Wuzheng Meng, J. P. Miller, C. Pai, Q. Xu, B. L. Roberts, O. Rind, Y.Y. Lee, Yannis K. Semertzidis, R. Prigl, Robert Sanders, J. Pretz, M. F. Hare, G. T. Danby, S. Giron, Satish Dhawan, J. Mi, R. McNabb, V. P. Druzhinin, F. Gray, I.B. Logashenko, C. Timmermans, David Miller, G. Bunce, Ulrich Haeberlen, Wen Liu, Alexei Trofimov, E. Efstathiadis, A. Steinmetz, Rasmus Larsen, H. Deng, D. Winn, Gerco Onderwater, B. I. Khazin, A. Grossmann, Klaus-Peter Jungmann, Masahiko Iwasaki, V. W. Hughes, D. Urner, D. W. Hertzog, William Deninger, D. Zimmerman, C. C. Polly, and R. M. Carey

Subjects
Nuclear physics, Physics, Larmor precession, Particle physics, Large Hadron Collider, Muon, Proton, Physics::Instrumentation and Detectors, Magnet, Physics::Accelerator Physics, Electron, Neutrino, Storage ring
Abstract

A new and improved experiment for measuring the muon magnetic anomaly at the Brookhaven National Laboratory (BNL) was successfully started and has yielded first results. New major components of the experiment include a superferric storage ring, a superconducting inflector, electrostatic quadrupoles, lead-scintillating fiber electron calorimeters and a high precision NMR magnetic field measurement and control system. The first measurement of the ratio R of the spin precession frequency of the positive muon relative to that of a free proton gives R=(3.707 219±0.000 048)×10−3. It is similar in accuracy and in good agreement with previous CERN measurements for μ+ and μ−. A muon kicker has been installed to boost the number of stored particles in the storage ring magnet and was successfully commissioned recently. The data acquired so far is expected to lower significantly the uncertainty in R. First extensive data-taking will start soon.

Published
1999
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26. New measurement of the anomalous magnetic moment of the positive muon

Author

F. Krienen, J. Gerhaeuser, Klaus-Peter Jungmann, W. A. Worstell, Masahiko Iwasaki, J. Sandberg, H. N. Brown, V. B. Golubev, H. Hirabayashi, S. I. Serednyakov, Yu. M. Shatunov, Rasmus Larsen, M. A. Green, G.V. Fedotovich, J. Kindem, Yuri F. Orlov, L. Snydstrup, W. Meng, H. Deng, C. Pearson, D. W. Hertzog, S. Sedykh, S. Rankowitz, Ulrich Haeberlen, E. P. Solodov, Alexei Trofimov, A. Steinmetz, B. Bunker, X. Fei, G. S. Varner, D. Winn, W. Earle, P. T. Debevec, E. Hazen, J. W. Jackson, R. M. Carey, I. Logashenko, J. P. Miller, E. Efstathiadis, A. Yamamoto, Jinsong Ouyang, D. von Lintig, A.V Maksimov, S. Giron, V. Monich, B. J. Hughes, S. Kochis, G. Bunce, Yu Merzliakov, T. D. Jones, Yannis K. Semertzidis, J. Cullen, B.I. Khazin, P. Cushman, L. Jia, O. Rind, P. von Walter, S. Kurokawa, D. Urner, I. Polk, G. T. Danby, T. Tallerico, M. Grosse-Perdekamp, David Miller, E. Benedict, C. Pai, A. Stillman, Y. Y. Lee, L. Duong, A. Grossmann, F. Toldo, D. Warburton, V. P. Druzhinin, H. E. Ahn, N.M. Ryskulov, B. L. Roberts, M. Mapes, L. R. Sulak, H. Hseuh, D. Zimmerman, M. F. Hare, W. M. Morse, C. C. Polly, M. Tanaka, V. W. Hughes, S. K. Dhawan, K. Endo, A. Disco, A. Soukas, C. Timmermans, J. Geller, William Deninger, K. Woodle, D. Kawall, Y. Mizumachi, D. N. Grigorev, A.G. Chertovskikh, R. Shutt, R. Prigl, R. McNabb, J. Benante, F. J. M. Farley, G. zu Putlitz, and S. I. Redin

Subjects
Physics, Larmor precession, Muon, Magnetic moment, Anomalous magnetic dipole moment, General Physics and Astronomy, Omega, Magnetic field, Nuclear physics, Precession, Physics::Accelerator Physics, High Energy Physics::Experiment, Atomic physics, Spin (physics)
Abstract

The muon anomalous magnetic moment has been measured in a new experiment at Brookhaven. Polarized muons were stored in a superferric ring, and the angular frequency difference, {omega}{sub a} , between the spin precession and orbital frequencies was determined by measuring the time distribution of high-energy decay positrons. The ratio R of {omega}{sub a} to the Larmor precession frequency of free protons, {omega}{sub p} , in the storage-ring magnetic field was measured. We find R=3.707thinsp220(48){times}10{sup {minus}3} . With {mu}{sub {mu}}/{mu}{sub p}=3.183thinsp 345thinsp47(47) this gives a{sub {mu}{sup +}}=1thinsp165thinsp 925(15){times}10{sup {minus}9} ({plus_minus}13 ppm ), in good agreement with the previous CERN measurements for {mu}{sup +} and {mu}{sup {minus}} and of approximately the same precision. {copyright} {ital 1999} {ital The American Physical Society}

Published
1999

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