| AVS 58th Annual International Symposium and Exhibition | |
| Vacuum Technology Division | Tuesday Sessions |
| Session VT-TuM |
| Session: | Accelerator and Large Vacuum System Design, Outgassing and Pumping |
| Presenter: | Marcy Stutzman, Thomas Jefferson National Accelerator Facility |
| Authors: | M.L. Stutzman, Thomas Jefferson National Accelerator Facility P.A. Adderley, Thomas Jefferson National Accelerator Facility |
| Correspondent: | Click to Email |
The Jefferson Lab DC, high voltage polarized electron source utilizes deep-UHV pressures to limit photocathode damage due to ionization and acceleration of residual gasses into the photocathode, as well as preserve the surface chemistry necessary for electron emission. Continued efforts toward improving and quantifying pressures below 5x10-12 Torr for electron source vacuum chambers will be presented, including operational experience with the newly available Watanabe Bent-Belt Beam (BBB) gauge, and the incorporation of a bakable cryopump into the pumping configuration.