The G0 experiment: Apparatus for parity-violating electron scattering measurements at forward and backward angles

D. Androić,David S. Armstrong,Jacques F. Arvieux,R. A. Asaturyan,Todd D. Averett,Scott L. Bailey,Guillaume Batigne,Douglas H. Beck,Elizabeth J. Beise,J. F. Benesch,Fatiha Benmokhtar,L. Bimbot,James Birchall,Angela S. Biselli,Peter E. Bosted,Herbert F. Breuer,Paul D. Brindza,C. L. Capuano,Roger D. Carlini,Rand W. Carr,N. S. Chant,YuChiu Chao,RM M. Clark,A. Coppens,Silviu D. Covrig,Anthony A. Cowley,Daniel S. Dale,Charles A. Davis,Catherine E Ellis,W. R. Falk,Howard C. Fenker,John M. Finn,Tony A. Forest,G. B. Franklin,Robert Frascaria,Christophe Furget,David R. Gaskell,Michael T W Gericke,Joseph M. Grames,Keith A. Griffioen,Klaus H. Grimm,G. Guillard,Benoît Guillon,Hulya Guler,K. K. Gustafsson,L. Hannelius,John C. Hansknecht,Richard D. Hasty,A. M. Hawthorne Allen,Tanja Horn,Takeyasu M. Ito,Kathryn V Johnston,Morgan K. Jones,Peter Kammel,Reza Kazimi,Pauline M. King,Ameya Kolarkar,E. J. Korkmaz,Wolfgang Korsch,Serge Kox,Johann Kühn,J. D. Lachniet,Ronald M. Laszewski,Lawrence Lee,Jacqueline Lenoble,Eric Liatard, Jianjun Liu,A. F. Lung,Glen A. MacLachlan,Juliette M. Mammei,Denis Marchand,Jonathan W. Martin,David J. Mack,Ken W. McFarlane,David W. Mckee,Robert D. McKeown,F. Merchez,M. Mihovilovič,A. M. Micherdzińska,Haykaz G. Mkrtchyan,Bryan J. Moffit,M. Morlet,Mathew Muether,John Musson,Kazutaka Nakahara,Retief Neveling,Silvia Niccolai,Daniel E. Nilsson,Saro Ong,Shelley A. Page,Vassili Papavassiliou,Stephen F. Pate,S. K. Phillips,Ph Pillot,Mark L. Pitt,Matt Poelker,Tracy A. Porcelli,Goulven Quéméner,Brian P. Quinn,W. D. Ramsay,Abdul W. Rauf,Jean Sebastien Réal,Thomas C. Ries,Julie Roche,Philip G. Roos,G. A. Rutledge,John P. Schaub,Jeffrey A. Secrest,Tomislav Ševa,Neven Šimičević,Gregory R. Smith,Damon T. Spayde,S. G. Stepanyan,Marcy L. Stutzman,Raid M. Suleiman,V. R. Tadevosyan,Raphael Noel Tieulent,Jacques Van De Wiele,Willem T H Van Oers,M. Versteegen,Eric Voutier,W. F. Vulcan,Sam P. Wells,Glen A. Warren,Steven E. Williamson,R. J. Woo,Stephen A. Wood,Chang Yan,Jinsik Yun,Valdis Zeps

Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment（2011）

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摘要

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 Cherenkov 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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关键词

Magnetic spectrometer,Liquid hydrogen target,Polarized electron beam,Parity-violation,Electron scattering

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