Higher order model power calculation of the 56 MHz SRF cavity
- Brookhaven National Laboratory (BNL), Upton, NY (United States)
A 56 MHz superconducting RF cavity (SRF) is going to be installed in Relativistic Heavy Ion Collider (RHIC) ring for the luminosity upgrade of the RHIC operation. Currently, it is being designed and prototype-tested as an Accelerator Improvement Project (AIP). The 56 MHz SRF cavity will be turned on at store of the RHIC operation. When the beam frequencies overlap or come close to the cavity HOM frequencies, the HOMs are excited in the cavity, which may lead to beam instability. Since the shunt impedance of the superconducting cavity tends to be higher than that of the copper cavity, the voltage developed in the cavity due to the HOM excitation can in principle be large. Therefore, suppressing the HOMs is an important task for the 56 MHz SRF cavity. To pursue the task, understanding the frequencies, Q factors and shunt impedances for the HOMs is prerequisite. Based on the given HOM characteristic, the HOM power can be calculated. The simulation results from the available programs as well as the prototype measurement results are used for the analysis.
- Research Organization:
- Brookhaven National Laboratory (BNL), Upton, NY (United States). Relativistic Heavy Ion Collider (RHIC)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- AC02-98CH10886
- OSTI ID:
- 1061911
- Report Number(s):
- BNL--99470-2013-IR; KB0202011
- Country of Publication:
- United States
- Language:
- English
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