Upgraded photon calorimeter with integrating readout for the Hall A Compton polarimeter at Jefferson Lab

Authors :: Friend, M.
Parno, D.
Benmokhtar, F.
Camsonne, A.
Dalton, M.M.
Franklin, G.B.
Mamyan, V.
Michaels, R.
Nanda, S.
Nelyubin, V.
Paschke, K.
Quinn, B.
Rakhman, A.
Souder, P.
Tobias, A.
Source :: Nuclear Instruments & Methods in Physics Research Section A. Jun2012, Vol. 676, p96-105. 10p.
Publication Year :: 2012
Abstract: Abstract: The photon arm of the Compton polarimeter in Hall A of Jefferson Lab has been upgraded to allow for electron beam polarization measurements with better than 1% accuracy. The data acquisition (DAQ) system now includes an integrating mode, which eliminates several systematic uncertainties inherent in the original counting-DAQ setup. The photon calorimeter has been replaced with a Ce-doped Gd2SiO5 crystal, which has a bright output and fast response, and works well for measurements using the new integrating method at electron beam energies from 1 to 6GeV. [Copyright &y& Elsevier]

Subjects :: *CALORIMETERS
*PHOTONS
*HALL effect
*COMPTON effect
*POLARISCOPE
*DATA acquisition systems
*ELECTRON beams
*POLARIZATION (Electricity)

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