JLab, Newport News, Virginia, USA
In this report, we present the development of a fast harmonic kicker, a normal conducting deflecting cavity that kicks electron bunches from ERL ring to circulator cooler ring (CCR) in Jefferson Lab Electron Ion Collider (JLEIC). This cavity utilizes 5 harmonic modes to generate a sharp kick to the electron bunch at high frequency of 86.6MHz, which is injection frequency into the CCR. The beam dynamics study and RF design of the hardware was reported in [1],[2]. In this report we present further progress including impedance by higher order mode (HOM) study and mechanical design for fabrication.
[1] G. Park, et. al TUPAL068, Proc. of IPAC 2018, Apr 2018, Vancouver, BC Canada
[2] G. Park, et. al, Proc. of IPAC2019, May 2019, Melbourne, Australia
THCOXBS01
JLab, Newport News, Virginia, USA
HZB, Berlin, Germany
Waveguide HOM dampers are widely used in high current RF cavities, as waveguides are natural high pass RF filters and can easily handle high RF power. In this presentation, the author will review a few typical waveguide HOM load designs, especially the recently developed high power HOM loads for BERLinPro and BESSY-VSR. We will report the RF-thermal-mechanical design, fabrication technology, absorber material choice, as well as the testing results of these HOM loads.
