We report on the design and construction of a high-energy photon polarimeter for measuring the degree of polarization of a linearly-polarized photon beam. The photon polarimeter uses the process of pair production on an atomic electron (triplet production). The azimuthal distribution of scattered atomic electrons following triplet production yields information regarding the degree of linear polarization of the incident photon beam. The polarimeter, operated in conjunction with a pair spectrometer, uses a silicon strip detector to measure the recoil electron distribution resulting from triplet photoproduction in a beryllium target foil. The analyzing power ΣA for the device using a 75 μm beryllium converter foil is about 0.2, with a relative systematic uncertainty in ΣA of 1.5%.
@article{arxiv.1703.07875,
title = {Design and construction of a high-energy photon polarimeter},
author = {M. Dugger and B. G. Ritchie and N. Sparks and K. Moriya and R. J. Tucker and R. J. Lee and B. N. Thorpe and T. Hodges and F. J. Barbosa and N. Sandoval and R. T. Jones},
journal= {arXiv preprint arXiv:1703.07875},
year = {2017}
}