6533b7d8fe1ef96bd126b7bc

RESEARCH PRODUCT

A source of polarized electrons based on photoemission of GaAsP.

W. GasteyerB. WagnerT. KettnerH. G. AndresenJ. AhrensE. ReichertWerner HeilD. ConrathW. HartmannL. KochH.-j. GessingerH. KesslerF. P. SchäferJ. Jethwa

subject

PhysicsNuclear and High Energy PhysicsQuasielastic scatteringMeV linear acceleratorInverse photoemission spectroscopychemistry.chemical_elementAngle-resolved photoemission spectroscopyParity (physics)ElectronCathodelaw.inventionchemistrylawBerylliumAtomic physicsInstrumentation

description

Abstract 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.

yearjournalcountryeditionlanguage
1990-01-01
10.1016/0168-9002(90)90200-phttps://hdl.handle.net/11858/00-001M-0000-002C-3682-411858/00-001M-0000-0013-0E79-F