Focal plane polarimeter for high-resolution magnetic spectrometer at CEBAF
- Rutgers Univ., Piscataway, NJ (United States)
Studying recoil proton polarization at proton accelerators has been fruitful. It has contributed to treatments of nuclear reactions based on the Dirac equation, constraints on picnic correlations inside nuclei, and the determination of the surprising dominance of spin-transfer excitations at excitation energies near 40 MeV. Recoil polarization measurements in electron scattering on the nucleon and nuclei should yield similar success. Fundamental properties of the nucleon, such as the electromagnetic form factors, can be measured precisely to high momentum transfer. The modification of these properties in nuclei can be studied in quasielastic scattering. Final state interaction effects uniquely determine some polarization components. The polarimeter uses straw tracking chambers to determine the azimuthal distribution of protons scattering from a graphite analyzer. The device is designed to minimize false asymmetries, and to have good tracking efficiency, rate capability, and acceptance. It will be used for proton energies up to {approximately} GeV.
- OSTI ID:
- 199543
- Report Number(s):
- CONF-941129--
- Country of Publication:
- United States
- Language:
- English
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