| Title |
Design of LHC Crab Cavities Based on DQW Cryomodule Test Experience |
| Authors |
- S. Verdú-Andrés
BNL, Upton, New York, USA
- R. Calaga, E. Cano-Pleite, R. Leuxe
CERN, Geneva, Switzerland
- J.A. Mitchell
Lancaster University, Lancaster, United Kingdom
|
| Abstract |
A cryomodule with two Double-Quarter Wave (DQW) cavities was designed, built and tested with the SPS beam in 2018. Each cavity was equipped with an rf pickup antenna to monitor field amplitude and phase. The pickup antenna also included a section expressly designed to couple and extract one of the Higher-Order Modes (HOM) at 1.754 GHz. The SPS beam tests evidenced direct coupling of the beam to this pickup antenna, in a similar way that a beam position monitor pickup couples to the passing beam. This undesired coupling had an impact on the RF feedback system responsible to regulate the cavity field and frequency. The present paper proposes a new DQW cavity design with improved antennae which provides adequate fundamental mode extraction while providing a reduction of both direct coupling to the beam and heat dissipation.
|
| Funding |
Work supported by US DOE through Brookhaven Science Associates LLC under contract No. DE-SC0012704, contract No. DE-FOA-0001848 and by the European Union HL-LHC Project. |
| Paper |
download THP035.PDF [4.987 MB / 4 pages] |
| Export |
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| Conference |
SRF2019 |
| Series |
International Conference on RF Superconductivity (19th) |
| Location |
Dresden, Germany |
| Date |
30 June-05 July 2019 |
| Publisher |
JACoW Publishing, Geneva, Switzerland |
| Editorial Board |
Peter Michel (HZDR, Dresden, Germany); André Arnold (HZDR, Dresden, Germany); Volker RW Schaa (GSI, Darmstadt, Germany) |
| Online ISBN |
978-3-95450-211-0 |
| Online ISSN |
"" |
| Received |
23 June 2019 |
| Accepted |
02 July 2019 |
| Issue Date |
14 August 2019 |
| DOI |
doi:10.18429/JACoW-SRF2019-THP035 |
| Pages |
925-928 |
| Copyright |
 Published by JACoW Publishing under the terms of the Creative Commons Attribution 3.0 International license. Any further distribution of this work must maintain attribution to the author(s), the published article's title, publisher, and DOI. |
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