A source of polarized electrons based on photoemission of GaAsP

Autor: W. Gasteyer, B. Wagner, T. Kettner, H. G. Andresen, J. Ahrens, E. Reichert, Werner Heil, D. Conrath, W. Hartmann, L. Koch, H.-J. Gessinger, H. Kessler, F. P. Schäfer, J. Jethwa
Jazyk: angličtina
Rok vydání: 1990
Předmět:
Zdroj: Nuclear Instruments & Methods in Physics Research Section A-Accelerators Spectrometers Detectors and Associated Equipment
Popis: The source described is based on photoemission of electrons from 100-GaAs0.62P0.38 activated to negative electron affinity. It is built to inject a beam of polarized electrons into the 350 MeV linear accelerator in Mainz. It is capable of delivering a mean current of 28 μA spin-polarized longitudinally to a degree of 0.44. The lifetime of the cathode under operational conditions is better than 200 h. The source was successfully run in a parity experiment, in which the analysing power of quasielastic scattering from beryllium for longitudinally polarized electrons was measured.
Databáze: OpenAIRE