Bochum 2009 – scientific programme
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HK: Fachverband Hadronen und Kerne
HK 76: Accelerators and Instrumentation II
HK 76.1: Group Report
Thursday, March 19, 2009, 16:30–17:00, H-ZO 90
Status Report of the Darmstadt Polarized Electron Source at the S-DALINAC* — •Christian Eckardt1, Roman Barday1, Uwe Bonnes1, Marco Brunken1, Ralf Eichhorn1, Joachim Enders1, Alf Göök1, Wolfgang F.O. Müller2, Markus Platz1, Yuliya Poltoratska1, Markus Roth1, Markus Wagner1, and Thomas Weiland2 — 1Institut für Kernphysik, Technische Universität Darmstadt, Germany — 2Institut für Theorie elektromagnetischer Felder, Technischer Universität Darmstadt, Germany
A source of polarized electrons has been designed and constructed for the superconducting Darmstadt electron linear accelerator S-DALINAC. The source has been set up in a separate test stand for commissioning.
A laser beam stimulates photoemission electrons from a negative electron affinity strained superlattice GaAs cathode. The electron beam is preaccelerated to 100 keV, focused and redirected to the horizontal plane. A Wien filter and Mott polarimeter in the beam line are used to manipulate and measure the polarization. For beam diagnostics wire scanners, fluorescent screens and a coaxial Faraday cup are installed.
Recent results on operation parameters and plans for future development are presented.
*Supported by Deutsche Forschungsgemeinschaft through SFB 634.