Dresden 2014 – wissenschaftliches Programm
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BE: Beschleunigerphysik
BE 11: Accelerator Physics Poster Session
BE 11.13: Poster
Mittwoch, 2. April 2014, 17:00–19:30, P4
Suppression Methods of Multipacting in a Superconducting RF Gun — •Eden Tafa Tulu1, Tomasz Galek1, André Arnold2, and Ursula van Rienen1 — 1Universität Rostock, Institut für Allgemeine Elektrotechnik, Albert-Einstein-Str. 2, 18051 Rostock, Germany — 2Helmholtz-Zentrum Dresden-Rossendorf, Germany
Superconducting radio frequency (SRF) structures may be subjected to electron multipacting (MP). This phenomenon is a problem that limits the accelerating gradient in the cavity. Moreover, it might cause an impair of RF components and distortion of the RF signal. Therefore, there should be an efficient countermeasure to suppress multipacting in order to boost the performance of SRF gun. Three techniques of suppression of the electron cloud from the vicinity of the cathode, such as DC-bias, simple geometric modification of the cathode and microstructure of the cathode's surface, in the Rossendorf SRF gun are presented in this work.