| Paper |
Title |
Page |
| MOPVA095 |
First RF Performance Results for the DQW Crab Cavities to be Tested in the CERN SPS |
1077 |
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- A. Castilla, R. Calaga, O. Capatina, K.M. Dr. Schirm, K.G. Hernández-Chahín, A. Macpherson, N.C. Shipman, K. Turaj
CERN, Geneva, Switzerland
- I. Ben-Zvi
BNL, Upton, Long Island, New York, USA
- G. Burt, J.A. Mitchell
Lancaster University, Lancaster, United Kingdom
- K.G. Hernández-Chahín
DCI-UG, León, Mexico
- N.C. Shipman
Cockcroft Institute, Lancaster University, Lancaster, United Kingdom
- N.C. Shipman
UMAN, Manchester, United Kingdom
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As part of the High Luminosity LHC (HL-LHC) project strategy, crab cavity correctors shall be installed around CMS and ATLAS experiments of the LHC. To accommodate the different crossing angle planes, two distinct cavity designs have been selected: the RF Dipole (RFD) and the Double Quarter Wave resonator (DQW). CERN has fabricated two double quarter wave resonators (DQWSPS), for validation with a proton beam at the CERN SPS accelerator. Standard superconducting rf surface preparation protocols have been applied to the two bulk niobium cavities, followed by cryogenic testing in a vertical cryostat at CERN's SM18 facility. The performance results obtained after the first bare cavity tests for cavities DQWSPS001 and DQWSPS002 are shown in this paper, and include Q0 vs Vt curves, Lorentz Force Detuning (LFD) analyses and pressure sensitivity of a higher order mode.
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2017-MOPVA095
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| THPAB057 |
Method to Calculate the Longitudinal Impedance From a Partial Wakefield Simulation |
3844 |
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- N.C. Shipman
UMAN, Manchester, United Kingdom
- G. Burt
Cockcroft Institute, Lancaster University, Lancaster, United Kingdom
- R. Calaga
CERN, Geneva, Switzerland
- J.A. Mitchell
Lancaster University, Lancaster, United Kingdom
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When simulating modes with high Q-factors, the wakefield length necessary to calculate the impedance spectrum can often mean a computation time of several weeks or more. A method has been developed which enables the longitudinal impedance and Q-factors of multiple modes to be calculated from a partially decayed wakefield simulation. This paper presents an overview of the method along with preliminary, proof of principle, results showing that considerable simulation time can be saved whilst maintaining a good degree of accuracy.
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2017-THPAB057
|
|
| Export • |
reference for this paper using
※ BibTeX,
※ LaTeX,
※ Text/Word,
※ RIS,
※ EndNote (xml)
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