Author: Arnold, A.
Paper Title Page
MOPSPP003
RF Performance and Beam Parameter Measurement of the 2nd 3.5 Cell SRF Gun for ELBE  
 
  • A. Arnold, M. Freitag, P.N. Lu, P. Murcek, H. Vennekate, R. Xiang
    HZDR, Dresden, Germany
  • G. Ciovati, P. Kneisel, L. Turlington
    JLab, Newport News, Virginia, USA
 
  In May 2014 the 1st superconducting photo injector (SRF gun) at HZDR was replaced by a new gun, featuring a new resonator and cryostat. The intention for this upgrade was to reach higher beam energy, higher bunch charge and lower emittance at the same time in order to serve user experiments at the superconducting CW accelerator ELBE. In our contribution we will report on the commissioning of the SRF gun by presenting a full set of RF performance results as well as detailed beam parameter measurements up to a bunch charge of 300 pC. Additionally, we will present the results of the first two user experiments (neutron and THz generation) that demonstrated the reliability of this gun concept.  
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WEIDCC003
Metal and Semiconductor Photocathodes in the HZDR SRF Gun  
 
  • J. Teichert, A. Arnold, P.N. Lu, P. Murcek, H. Vennekate, R. Xiang
    HZDR, Dresden, Germany
 
  The superconducting RF photoelectron gun at the ELBE accelerator facility is a high-repetition rate electron injector for CW operation and can provide high average current and high brightness electron beams. During commissioning and operating time different types of photocathodes, metallic (Cu, Mg) and semiconductors (Cs2Te), have been used. We present the preparation processes, properties as well as performance and operational experience of the cathodes in the SRF gun. Furthermore, specific issues like cathode cooling, multipacting, and dark current will be discussed.  
slides icon Slides WEIDCC003 [22.113 MB]  
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