Dresden 2013 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 129: Beschleunigerphysik XVI (Poster)

T 129.8: Poster

Mittwoch, 6. März 2013, 16:45–19:00, HSZ 1.OG

Transverse Phase Space Measurement of SRF-gun in HZDR using Single Slit Method — •Pengnan Lu^1,2, Jochen Teichert¹, Hannes Vennekate^1,2, Petr Murcek¹, Rong Xiang¹, and André Arnold¹ — ¹Helmholtz Zentrum Dresden Rossendorf, Dresden, Germany — ²Dresden University of Technology, Dresden, Germany

A three-and-a-half-cell SRF-gun has been developed and commissioned in HZDR since 2004. The emittance of this gun was measured before by both solinoid/quadrupol scanning method and multiple slits method. Recently we did new measurements via single slit method to obtain the beam phase space with a higher space resolution and without the overlapping problem.

At first the hardware system composed of slit boards, a YAG screen and a camera will be described. Then the interface and structure of a labview program for data acquisition and processing will be shown. In data processing we will discuss the image correction, sensitivity of several parameters to the final result and how the background was eliminated. Finally we will give the estimation of the measurement error and the analysis of phase space measurement of both electron current and dark current. For electron current, the normalized rms emittance has a good agreement with that measured by solenoid scanning. For dark current, the phase space shows clearly two components, which echoes the assumption that both the cathode and the cavity contribute part of the dark current with different phases.