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Nicolas Falletto; Martial Authier; Maud Baylac; Boyer, M.; Francois Bugeon; Etienne Burtin; Christian Cavata; Nathalie Colombel; Congretel, G.; Coquillard, R.; Coulloux, G.; Bertrand Couzy; Deck, P.; Alain Delbart; Desforges, D.; Donati, A.; Duboue, B.; Stephanie Escoffier; Farci, F.; Bernard Frois; Girardot, P.; Guillotau, J.; Henriot, C.; Claude Jeanney; Juillard, M.; Jorda, J. P.; Legou, P.; David Lhuillier; Lussignol, Y.; Phillippe Mangeot; Martin, X.; Frederic Marie; Jacques Martino; Maurier, M.; Bernard Mazeau; Millot, J.F.; Molinie, F.; Mols, J.-P.; Jean-Pierre Mouly; Mur, M.; Damien Neyret; Pedrol, T.; Stephane Platchkov; Pontet, G.; Thierry Pussieux; Yannick Queinec; Philippe Rebourgeard; Sellier, J. C.; Gerard Tarte; Christian Veyssiere; Andre Zakarian; Pierre Bertin; Alain Cosquer; Jian-ping Chen; Joseph Mitchell; Mackowski, J.-M.; Pinard, L.
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States). Funding organisation: USDOE Office of Energy Research (ER) (United States)2001
Thomas Jefferson National Accelerator Facility, Newport News, VA (United States). Funding organisation: USDOE Office of Energy Research (ER) (United States)2001
AbstractAbstract
[en] We built and commissioned a new type of Compton polarimeter to measure the electron beam polarization at the Thomas Jefferson National Accelerator Facility (Virginia, USA). The heart of this polarimeter is a high-finesse monolithic Fabry-Perot cavity. Its purpose is to amplify a primary 300 mW laser beam in order to improve the signal to noise ratio of the polarimeter. It is the first time that a high-finesse Fabry-Perot cavity is enclosed in the vacuum of a particle accelerator to monitor the beam polarization by Compton polarimetry. The measured finesse and amplification gain of the cavity are F=26000 and G=7300. The electron beam crosses this high-power photon source at an angle of 23 mrad in the middle of the cavity where the photon beam power density is estimated to be 0.85MW/cm2. We have used this facility during the HAPPEX experiment (April-July 1999) and we give a preliminary measurement of Compton scattering asymmetry
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Mar 2001; [10 p.]; DOE/ER/40150--2567; JLAB-PHY--00-57; A; Available from Thomas Jefferson National Accelerator Facility, Newport News, VA (United States); Also published in: Nuclear Instruments and Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors and Associated Equipments, ISSN 0168-9002, v.459(3)
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