[SLAC]
[SLAC Pubs and Reports]
SLAC-PUB-12116
Undulator Background in the Final Focus Test Beam Experiment with Polarized Positrons
Abstract
In the proposed E-166 experiment at SLAC, 50 GeV electrons pass through a helical undulator, and
produce circularly polarized photons, which interact with a tungsten target and generate longitudinally
polarized positrons. The background is an important issue for an experiment under consideration. To
address this issue, simulations were performed with the code GEANT3 to model the production of
secondary particles from high-energy electrons hitting an undulator. The energy density of photons
generated at the target has been analyzed. Results of the simulations are presented and discussed.
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