TITLE

MeV Mott Polarimetry at Jefferson Lab

AUTHOR(S)
Steigerwald, M.
PUB. DATE
June 2001
SOURCE
AIP Conference Proceedings;2001, Vol. 570 Issue 1, p935
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
In the recent past, Mort polarimetry has been employed only at low electron beam energies (≈100keV). Shortly after J. Sromicki demonstrated the first Mort scattering experiment on lead foils at 14 MeV (MAMI, 1994), a high energy Mott scattering polarimeter was developed at Thomas Jefferson National Accelerator Facility (5 MeV, 1995). An instrumental precision of 0.5% was achieved due to dramatic improvement in eliminating the background signal by means of collimation, shielding, time of flight and coincidence methods. Measurements for gold targets between 0.05 µm and 5 µm for electron energies between 2 and 8 MeV are presented. A model was developed to explain the depolarization effects in the target foils due to double scattering. The instrumental helicity correlated asymmetries were measured to smaller than 0.1%.
ACCESSION #
6310104

 

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