The Compton backscattering polarimeter of the A4 experiment
20054 pages
Published in:
- Prog.Part.Nucl.Phys. 55 (2005) 332-335
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Abstract: (Elsevier)
The A4 collaboration at the Institut für Kernphysik, University of Mainz, is conducting experiments on single-spin asymmetries in the elastic electron–nucleon-scattering which require polarized beams. In order to measure the absolute beam polarization, we have installed a Compton backscattering polarimeter in front of the target, using for the first time the internal cavity concept. A maximum intra-cavity intensity of 90 W has been measured, and in August 2003, first backscattered photons have been detected. Recently, first Compton asymmetries have been measured.- Polarized beams
- Beam analyzers
- Beam monitors and Faraday cups
- Resonators
- Cavities
- Amplifiers and rings
- Electron polarization measurement
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