Berlin 2024 – scientific programme

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AKBP: Arbeitskreis Beschleunigerphysik

AKBP 2: Electron Sources and Cathodes

AKBP 2.5: Talk

Monday, March 18, 2024, 12:45–13:00, E 020

High quantum efficiency magnesium photocathode for photoinjectors — •Rong Xiang, Jana Schaber, Jochen Teichert, Andre Arnold, Petr Murcek, Raffael Niemczyk, and Anton Ryzhov — Helmholtz Zentrum Dresden Rossendorf

To improve the quality of photocathodes is one of the critical issues in enhancing the stability and reliability of photo-injector systems. Magnesium has a low work function (3.6 eV) and shows high quantum efficiency (QE) after proper surface cleaning. This paper presents the investigation of alternative surface cleaning procedures, such as ps-laser cleaning, thermal cleaning and ion beam cleaning. The QE is able to be improved two magnitudes after the treatment.

Keywords: photoinjector; photocathode; quantum efficiency; magnisium