| AVS 54th International Symposium | |
| Vacuum Technology | Thursday Sessions |
| Session VT-ThM |
| Session: | Pumping, Pressure Measurement and Calibration |
| Presenter: | M.L. Stutzman, Thomas Jefferson National Accelerator Facility |
| Authors: | M.L. Stutzman, Thomas Jefferson National Accelerator Facility P.A. Adderley, Thomas Jefferson National Accelerator Facility J. Grames, Thomas Jefferson National Accelerator Facility M. Poelker, Thomas Jefferson National Accelerator Facility |
| Correspondent: | Click to Email |
Improving vacuum is a necessary step toward improving photocathode lifetime in DC high voltage polarized electron sources, which is an important goal for both the CEBAF nuclear physics accelerator at Jefferson Lab and future facilities. A new load-locked photogun vacuum system has been constructed using many vacuum improvements, including vacuum firing and NEG coating the gun high voltage chamber. The vacuum characteristics of the new photogun are described in the context of traditional vacuum measurements but perhaps more importantly, a vacuum assessment is made by comparing new and old photogun performance.