The G0 Experiment: Apparatus for Parity-Violating Electron Scattering Measurements at Forward and Backward Angles

D. Androic D. S. Armstrong J. Arvieux R. Asaturyan T. D. Averett S. L. Bailey Guillaume Batigne 1, 2 D. H. Beck E. J. Beise J. Benesch F. Benmokhtar L. Bimbot 3 J. Birchall A. Biselli P. Bosted H. Breuer P. Brindza C. L. Capuano R. D. Carlini R. Carr N. Chant Y. -C. Chao R. Clark A. Coppens S. D. Covrig A. Cowley D. Dale C. A. Davis C. Ellis W. R. Falk H. Fenker J. M. Finn T. Forest G. Franklin R. Frascaria C. Furget 4 D. Gaskell M. T. W. Gericke J. Grames K. A. Griffioen K. Grimm G. Guillard 4 B. Guillon H. Guler K. Gustafsson L. Hannelius J. Hansknecht R. D. Hasty A. M. Hawthorne Allen T. Horn T. M. Ito K. Johnston M. Jones P. Kammel R. Kazimi P. M. King A. Kolarkar E. Korkmaz W. Korsch S. Kox 4 J. Kuhn J. Lachniet R. Laszewski L. Lee J. Lenoble E. Liatard 4 J. Liu A. Lung G. A. Maclachlan J. Mammei D. Marchand 3 J. W. Martin D. J. Mack K. W. Mcfarlane D. W. Mckee R. D. Mckeown F. Merchez 4 M. Mihovilovic A. Micherdzinska H. Mkrtchyan B. Moffit M. Morlet M. Muether J. Musson K. Nakahara R. Neveling S. Niccolai 3 D. Nilsson S. Ong S. A. Page V. Papavassiliou S. F. Pate S. K. Phillips P. Pillot M. L. Pitt M. Poelker T. A. Porcelli G. Quéméner 4 B. P. Quinn W. D. Ramsay A. W. Rauf J.S. Real 4 T. Ries J. Roche P. Roos G. A. Rutledge J. Schaub J. Secrest T. Seva N. Simicevic G. R. Smith D. T. Spayde S. Stepanyan M. Stutzman R. Suleiman V. Tadevosyan R. Tieulent J. Van de Wiele 3 W. T. H. Van Oers M. Versteegen E. Voutier 4 W. F. Vulcan S. P. Wells G. Warren S. E. Williamson R. J. Woo S. A. Wood C. Yan J. Yun V. Zeps
Abstract : In the G0 experiment, performed at Jefferson Lab, the parity-violating elastic scattering of electrons from protons and quasi-elastic scattering from deuterons is measured in order to determine the neutral weak currents of the nucleon. Asymmetries as small as 1 part per million in the scattering of a polarized electron beam are determined using a dedicated apparatus. It consists of specialized beam-monitoring and control systems, a cryogenic hydrogen (or deuterium) target, and a superconducting, toroidal magnetic spectrometer equipped with plastic scintillation and aerogel Cerenkov detectors, as well as fast readout electronics for the measurement of individual events. The overall design and performance of this experimental system is discussed.
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D. Androic, D. S. Armstrong, J. Arvieux, R. Asaturyan, T. D. Averett, et al.. The G0 Experiment: Apparatus for Parity-Violating Electron Scattering Measurements at Forward and Backward Angles. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Elsevier, 2011, 646, pp.59-86. ⟨10.1016/j.nima.2011.04.031⟩. ⟨in2p3-00573751⟩

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