Berlin 2005 – wissenschaftliches Programm
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HK: Physik der Hadronen und Kerne
HK 22: Postersitzung
HK 22.68: Poster
Montag, 7. März 2005, 16:30–18:00, TU MA141
Status of the S–DALINAC Polarized Injector ⋆ — •C. Heßler1, W. Ackermann2, V. B. Asgekar1,3, K. Aulenbacher4, M. Brunken1, J. Enders1, H.-D. Gräf1, G. Iancu1, S. Khodyachykh1, W. F. O. Müller2, Y. Poltoratska1, M. Roth1, B. Steiner2, T. Weiland2, and J. Zwarych1 — 1Inst. für Kernphysik, TU Darmstadt, Germany — 2Inst. Theorie elektromagnetischer Felder, TU Darmstadt, Germany — 3Dept. of Physics, University of Pune, India — 4Inst. für Kernphysik, Universität Mainz, Germany
Recent developments for a source of polarized electrons at the superconducting electron linear accelerator S-DALINAC at the Technische Universität Darmstadt will be presented. The polarized electron beam will be produced by photoemission from a ‘strained-layer’ GaAs/GaAsP cathode. The results of detailed simulations of the cathode geometry and of the beam dynamics will be shown. A ‘load-lock’ chamber for the preparation of GaAs photocathodes has been adapted from the source of polarized electrons at the MAMI accelerator at Mainz [1] and has been assembled. A semiconductor laser system is presently under development; pulsed operation of the seed laser with a repetition rate of 3 GHz has been achieved. A compact Mott polarimeter based on the design of a device developed for MAMI is presently under construction.
[1] K. Aulenbacher et al., Nucl. Instrum. Meth. A 391, 498 (1997) ⋆Supported by DFG through SFB 634 and GRK 410.