Dispositif expérimental pour la diffusion Compton virtuelle dans le régime profondément inélastique dans le Hall A au Jefferson Laboratory

Abstract : The Hall A Deeply Virtual Compton Scattering (DVCS) experiment used the 5.757 GeV polarized electron beam available at Jefferson Laboratory and ran from september until december 2004. Using the standard Hall A left high resolution spectrometer three kinematical points were taken at a fixed xbjorken = 0.32 value for three Q2 values : 1.5 GeV 2, 1.91GeV 2, 2.32 GeV 2. An electromagnetic Lead Fluoride calorimeter and a proton detector scintillator array designed to work at a luminosity of 1037cm−2s−1 were added to ensure the exclusivity of the DVCS reaction. In addition to the new detectors new custom electronics was used : a calorimeter trigger module which determines if a electron photon coincidence has occured and a sampling system allowing to deal with pile-up events during the offline analysis. Finally the data from the kinematic at Q2=2.32 GeV2 et s=5.6GeV2 allowed to get a preliminary result for the exclusive π0 electroproduction on the proton.
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Chemical Physics. Université Blaise Pascal - Clermont-Ferrand II, 2005. French. <NNT : 2005CLF21606>


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Submitted on : Thursday, March 29, 2012 - 12:05:25 PM
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  • HAL Id : tel-00683591, version 1

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A. Camsonne. Dispositif expérimental pour la diffusion Compton virtuelle dans le régime profondément inélastique dans le Hall A au Jefferson Laboratory. Chemical Physics. Université Blaise Pascal - Clermont-Ferrand II, 2005. French. <NNT : 2005CLF21606>. <tel-00683591>

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