Author/Authors :
Friend، نويسنده , , M. and Parno، نويسنده , , D. and Benmokhtar، نويسنده , , F. and Camsonne، نويسنده , , A. and Dalton، نويسنده , , M.M. and Franklin، نويسنده , , G.B. and Mamyan، نويسنده , , V. and Michaels، نويسنده , , R. and Nanda، نويسنده , , S. and Nelyubin، نويسنده , , V. and Paschke، نويسنده , , K. and Quinn، نويسنده , , B. and Rakhman، نويسنده , , A. and Souder، نويسنده , , P. and Tobias، نويسنده , , A.، نويسنده ,
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 6 GeV.
Keywords :
Compton polarimeter , Jefferson Laboratory , Electron beam polarimetry , Integrating DAQ
