DocumentCode
3210190
Title
Time Dependant Quantum Efficiency and Dark Current Measurements in an RF Photocathode Injector with a High Quantum Efficiency Cathode
Author
Fliller, R.P. ; Edwards, H. ; Hartung, W.
Author_Institution
Fermilab, Batavia, IL 60510, Email: fliller@fnal.gov
fYear
2005
fDate
16-20 May 2005
Firstpage
2681
Lastpage
2683
Abstract
Studies of photo-emission and field emission behavior in an RF gun have been carried out. Unexpected phenomena were observed. In situ changes in the cathode’s quantum efficiency and dark current with time were seen during operation of the photo-injector. These changes were correlated with the magnetostatic field at the cathode. In addition, multipacting has been observed under certain conditions. Recent measurements indicate a correlation between multipacting and anomalous photo-and field emission behavior.
Keywords
Cathodes; Current measurement; Dark current; Magnetic field measurement; Magnetostatics; Pulse measurements; Radio frequency; Solenoids; Superconducting magnets; Time measurement;
fLanguage
English
Publisher
ieee
Conference_Titel
Particle Accelerator Conference, 2005. PAC 2005. Proceedings of the
Print_ISBN
0-7803-8859-3
Type
conf
DOI
10.1109/PAC.2005.1591227
Filename
1591227
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