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Running Experience of the Superconducting RF Photoinjector at FZD

Xiang, R.; Buettig, H.; Janssen, D.; Justus, M.; Lehnert, U.; Michel, P.; Murcek, P.; Schamlott, A.; Schneider, C.; Arnold, A.; Teichert, J.; Schurig, R.; Kamps, T.; Rudolph, J.; Schenk, M.; Staufenbiel, F.; Will, I.; Klemz, G.

Abstract

More and more electron accelerator projects for FELs, ERLs or 4th generation light sources require “super” electron beams with high brightness, low emittance, and high average current. Under this background, much attention is paid on the research and development of new electron sources. A Superconducting RF photoinjector within a collaboration of HZB, DESY, FZD, and MBI is designed to improve the beam quality for ELBE IR-FEL users, and at the same time to test this kind of promising injector concept. The main design parameters of this gun are the final electron energy of 9.5 MeV, 1 mA average current, and transverse normalized emittances (rms) of 1 mm mrad at 77 pC and 2.5 mm mrad at 1 nC bunch charge. In this paper the results of the RF and beam parameter measurements with Cs2Te photo cathodes will be presented, and the experience for the gun running gained at the first beam experiment will be concluded, including the life time and the compatibility of the normal conducting photocathode in SC cavity, the cavity properties after the cathode’s inserting.

Keywords: electron accelerator for FEL; 4th generation; high brightness; low emittance; high average; new electron source; superconducting RF photoinjector

  • Lecture (Conference)
    The 31st International Free Electron Laser Conference FEL 2009,, 23.-28.08.2009, Liverpool, UK

Permalink: https://www.hzdr.de/publications/Publ-13511


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