Multipacting-free Quarter-wavelength Choke Joint Design for BNL SRF

Wencan Xu, Sergey Belomestnykh, Ilan Ben-Zvi, Chong-Jer Liaw, Gary McIntyre, Kevin Smith, Roberto Than, Joseph Tuozzolo, Erdong Wang, Daniel Weiss, Alex Zaltsman, Schaa, Volker R.W. (Ed.) (+3 others)
The BNL SRF gun cavity was operated well at CW mode up to 2 MV. However, the performance suffered due to multipacting in the quarter-wavelength choke-joint. A new multipacting-free cathode stalk was designed and will be conditioned. This paper will describes RF and thermal design of new cathode stalk and conditioning results.
doi:10.18429/jacow-ipac2015-tupma047 fatcat:acrisg6s5vda5ndydqsp3jmvta