Abstract
A dielectric-assist accelerating (DAA) cavity is a standing-wave accelerating cavity that attains a Q-value of over 100,000 at room temperature by using the reflection of the dielectric layer; the DAA cavity is expected to be used with a small rf power source and high-duty operation. Thus far, the maximum accelerating field of DAA cavities has been limited to a few MV/m by the multipactor discharges. Multipactor discharges are widely observed in the accelerator field, and their suppression has been studied to improve accelerator performance. By applying a diamondlike carbon (DLC) coating to reduce the secondary electron emission coefficient without sacrificing the Q-value of the cavity, we have demonstrated that a C-band rf pulse with a pulse length of can be injected into a DAA cavity with a field of more than 10 [MV/m] while suppressing the multipactor discharges.
3 More- Received 26 September 2020
- Accepted 25 January 2021
DOI:https://doi.org/10.1103/PhysRevAccelBeams.24.022001
Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
Published by the American Physical Society