3 papers
physics.acc-ph2026
Two-port CW measurements on RF cavities: Notes on self-consistency assessment and indirect methods
Walter H. Hartung, Wei Chang, Sang-Hoon Kim +2
In the case of a radio-frequency (RF) cavity with a mismatched input coupler, a direct calculation of the power dissipation in the cavity and the intrinsic quality factor from cont…
physics.acc-ph2025
Report on first plasma processing trial for a FRIB quarter-wave resonator cryomodule
Walter Hartung, Wei Chang, Yoo-Lim Cheon +6
Plasma processing has been shown to help mitigate degradation of the performance of superconducting radio-frequency cavities, providing an alternative to removal of cryomodules fro…
physics.acc-ph2025
Plasma Processing of FRIB Low-Beta Cryomodules using Higher-Order-Modes
P. Tutt, W. Chang, K. Elliott +4
Improvement in SRF accelerator performance after in-tunnel plasma processing has been seen at SNS and CEBAF. Plasma processing development for FRIB quarter-wave and half-wave reson…