Cold Test Measurements on the GTF Prototype RF Gun

Gierman, S.M.

关键词: ELECTRON GUNS;    TESTING;    TEST FACILITIES;    LINEAR ACCELERATORS;    FREE ELECTRON LASERS;    LIGHT SOURCES;    BRIGHTNESS;    ELECTRON BEAM INJECTION;    CALIBRATION;    RF SYSTEMS;    COMPUTERIZED SIMULATION XFEL;   

DOI  :  10.2172/993721
RP-ID  :  SLAC-TN-10-056
PID  :  OSTI ID: 993721
Others  :  TRN: US1100047

学科分类：核物理和高能物理

美国|英语

来源: SciTech Connect

【 摘 要 】

The SSRL Gun Test Facility (GTF) was built to develop a high brightness electron injector for the LCLS and has been operational since 1996. Based on longitudinal phase space measurements showing a correlated energy spread the gun was removed and re-characterized in 2002. The low power RF measurements performed on the gun are described below. Perturbative bead measurements were performed to determine the field ratio in the two-cell gun, and network analyzer measurements were made to characterize the mode structure. A second probe was installed to monitor the RF field in the first cell, and a diagnostic was developed to monitor the high-power field ratio. Calibration of the RF probes, a model for analyzing RF measurements, and Superfish simulations of bead and RF measurements are described.