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Title: An electron beam polarimeter based on scattering from a windowless, polarized hydrogen gas target

Here we present the idea to develop a precision polarimeter for low energy, intense polarized electron beams using a windowless polarized hydrogen gas cell fed by an atomic beam source. This technique would use proven technology used successfully in both the electron scattering experiments: HERMES with 27 GeV electron and positron beams at DESY, and BLAST with 850 MeV electron beams at MIT-Bates. At 100 MeV beam energy, both spin-dependent Mo/ller and elastic electron-proton scattering processes have a high cross section and sizable spin asymmetries. The concept is described and estimates for realistic rates for elastic electron-proton scattering and Mo/ller scattering are presented. A number of important issues which affect the ultimate systematic uncertainty are identified.
Authors:
;  [1]
  1. Laboratory for Nuclear Science, MIT, Cambridge, MA, 02139 (United States)
Publication Date:
OSTI Identifier:
22280692
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1563; Journal Issue: 1; Conference: Workshop to explore physics opportunities with intense, polarized electron beams at 50-300 MeV, Cambridge, MA (United States), 14-16 Mar 2013; Other Information: (c) 2013 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; ACCURACY; ASYMMETRY; ATOMIC BEAM SOURCES; BEAM PRODUCTION; CROSS SECTIONS; DESY; ELASTIC SCATTERING; ELECTRON BEAMS; ELECTRON-PROTON INTERACTIONS; ELECTRONS; GEV RANGE; HYDROGEN; MEV RANGE; POLARIMETERS; POLARIZED BEAMS; POSITRON BEAMS; SPIN