Feb 20 – 22, 2013
Europe/Zurich timezone

Photocathodes for Rossendorf SRF gun

Feb 20, 2013, 3:00 PM
30-7-018 (CERN)



European Organisation for Nuclear Research CH - 1211Genève 23 Switzerland


Dr Rong Xiang (H)


Rossendorf SRF gun is an electron source for high current electron beams based on superconducting RF technology and laser driven photocathode. Semiconductor Cs2Te photocathodes are the standard electron sources. Up to now eight Cs2Te photocathodes have been operated in the SRF gun. Quantum efficiency (Q.E.) of 1% and life time of months satisfy the gun operation. Besides the present Cs2Te photocathode, GaAs(Cs, O) attracts a lot of attention because of its high QE in the visible light range and the probability to produce high polarization beams. A new preparation system for GaAs is developing, and we will later examine the activation and performance of GaAs photocathodes in SRF gun.

Primary author


Andre Arnold (Helmholtz-Zentrum Dresden-Rossendorf) Hannes Vennekate (Helmholtz-Zentrum Dresden-Rossendorf) Jochen Teichert (H) Pengnan Lu (Helmholtz-Zentrum Dresden-Rossendorf) Petr Murcek (Helmholtz-Zentrum Dresden-Rossendorf)

Presentation materials