Dresden 2014 – scientific programme

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BE: Beschleunigerphysik

BE 11: Accelerator Physics Poster Session

BE 11.8: Poster

Wednesday, April 2, 2014, 17:00–19:30, P4

Development status of Photo-CATCH facility at the S-DALINAC — •Neeraj Kurichiyanil, Christian Eckardt, Joachim Enders, Markus Wagner, Martin Espig, and Yuliya Fritzsche — Institut für Kernphysik, TU Darmstadt

We report on the development status of a photocathode activation, test and cleaning using atomic hydrogen (Photo-CATCH) facility for semiconductor photocathodes used at the polarized electron source at the Darmstadt superconducting accelerator S-DALINAC. Three ultra-high vacuum (UHV) chamber design has dedicated chambers for 1) atomic hydrogen cleaning 2) single- or multi-alkali negative electron affinity (NEA) activation and quantum efficiency (QE) as well as lifetime studies and 3) test of the activated cathodes at high-voltage. A polarized electron beam of up to 60 keV will be available for operational QE and charge lifetime measurements and other experiments. The research is aimed at improving vacuum conditions, cathode dark and charge lifetimes, and exploring superior activation procedures. Supported by DFG through SFB 634 and by the state of Hesse within the LOEWE centre HIC for FAIR.