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. J. 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 , Philippe 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

1 Mines Nantes - Mines Nantes
2 SUBATECH - Laboratoire SUBATECH Nantes
3 IPNO - Institut de Physique Nucléaire d'Orsay
4 LPSC - Laboratoire de Physique Subatomique et de Cosmologie

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.

Domaines: Physique Nucléaire Expérimentale [nucl-ex]; Instrumentations et Détecteurs [physics.ins-det]

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, 2011, 646, pp.59-86. ⟨10.1016/j.nima.2011.04.031⟩. ⟨in2p3-00573751⟩