DocumentCode :
377602
Title :
Modeling and measurements of the DUVFEL photoinjector cavity rf properties
Author :
Rose, J. ; Graves, W. ; Heese, R. ; Johnson, E. ; Krinsky, S. ; Sheehy, B.
Author_Institution :
NSLS, Brookhaven Nat. Lab., Upton, NY, USA
Volume :
3
fYear :
2001
fDate :
2001
Firstpage :
2221
Abstract :
The 1.6 cell S-band photoinjector cavity has been in operation at the DUVFEL at BNL for the past year. The initial beam measurements indicated a higher than expected emittance and beam divergence at the exit of the gun field. The imbalance in the two cells was suspected, but lack of field probes in the cavity prohibited direct confirmation. A detailed SUPERFISH model was constructed of the cavity assembly. The field balance as a function of cathode plate and tuner position was determined using the model. A series of calibrated measurements of both the cavity RF properties and the delivered RF power was undertaken. Electron beam properties were also measured as a function of cavity tune. Significant improvements in beam quality were achieved. The simulations and measurements are presented
Keywords :
accelerator RF systems; accelerator cavities; calibration; electron accelerators; electron beam focusing; electron beams; electron guns; free electron lasers; klystrons; linear accelerators; particle beam bunching; particle beam injection; BNL; DUVFEL photoinjector cavity; RF power; S-band photoinjector cavity; SUPERFISH model; accelerating tanks; beam divergence; beam emittance; beam measurements; bunch compression chicane; calibrated measurements; cathode plate; cavity assembly; cavity tune; deep ultraviolet free electron laser; electron beam properties; electron linear accelerator; field probes; focusing solenoid; klystrons; photocathode electron gun; radiofrequency properties; traveling wave accerating tanks; tuner position; Assembly; Cathodes; Electron beams; Geometry; Klystrons; Linear particle accelerator; Radio frequency; Seals; Springs; Steel;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Particle Accelerator Conference, 2001. PAC 2001. Proceedings of the 2001
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-7191-7
Type :
conf
DOI :
10.1109/PAC.2001.987330
Filename :
987330
Link To Document :
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