New results from the MIT-Bates polarized source and the test beam setup

Details New results from the MIT-Bates polarized source and the test beam setup New results from the MIT-Bates polarized source and the test beam setup

Jun 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aipc..570..955f&link_type=abstract

The fourteenth international spin physics symposium, SPIN2000. AIP Conference Proceedings, Volume 570, pp. 955-960 (2001).

Physics

1

Electron Sources, Polarized Beams, Photomultipliers, Phototubes And Photocathodes, Relativistic Electron And Positron Beams

Scientific paper

During the summers of 1998 and 1999, the polarized source at MIT delivered over 300 Coulombs of high quality polarized pulsed beam to the SAMPLE parity violation experiment. This success in beam delivery signified achievements of long lifetime for the Bates polarized source in both high average and high peak current regimes. The injection requirements of high polarization beams for the South Hall Ring will be discussed. They are relatively modest for the storage mode but very demanding in peak current and repetition rate for the extraction mode. Because of these requirements, a 60 keV test beam setup with a Mott polarimeter was constructed at Bates and will be described here. This setup is independent of the main accelerator and has provided a platform for R&D in photocathodes and high power lasers. New results will be presented on high peak current photoemission from strained GaAsP samples using fiber coupled diode array laser systems on this test setup. A brief report will be presented on the photoemission requirements of a future e-p Collider that is currently under discussion in the nuclear and particle physics community in the US. .

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