Status of the polarized source at MAMI
作者:
Kurt Aulenbacher,
Valeri Tioukine,
Markus Wiessner,
Konrad Winkler,
期刊:
AIP Conference Proceedings
(AIP Available online 1903)
卷期:
Volume 675,
issue 1
页码: 1088-1092
ISSN:0094-243X
年代: 1903
DOI:10.1063/1.1607302
出版商: AIP
数据来源: AIP
摘要:
This talks addresses the operation of the polarized source at the Mainz Microtron MAMI. The source is operating with selected photocathodes of modulation doped, uniaxially strained layer photocathodes, which results in an average spin polarization of 80&percent; and a quantum efficiency of typically 2 &mgr;A/mW. The operative lifetime has been improved by employing a novel activation technique which reduces transmission losses in the vicinity of the cathode. In addition a considerable simplification of the laser system has become possible by improving the power output of laser diode seed lasers so that it is not necessary to employ power amplifier units. It was shown that the potential for increasing the laser power is limited in our setup because of the thermal resistance between cathode and the surrounding electrode. © 2003 American Institute of Physics
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