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| TUPAB076 |
High-Gradient Breakdown Studies of an X-Band Accelerating Structure Operated in the Reversed Taper Direction |
1543 |
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- X.W. Wu, N. Catalán Lasheras, A. Grudiev, G. McMonagle, I. Syratchev, W. Wuensch
CERN, Meyrin, Switzerland
- M. Boronat
IFIC, Valencia, Spain
- A. Castilla, A.V. Edwards, W.L. Millar
Lancaster University, Lancaster, United Kingdom
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The results of high-gradient tests of a tapered X-band traveling-wave accelerator structure powered in reversed direction are presented. Powering the tapered structure from the small aperture, normally output, at the end of the structure provides unique conditions for the study of gradient limits. This allows high fields in the first cell for a comparatively low input power and a field distribution that rapidly falls off along the length of the structure. A maximum gradient of 130 MV/m in the first cell at a pulse length of 100 ns was reached for an input power of 31.9 MW. Details of the conditioning and operation at high-gradient are presented. Various breakdown rate measurements were conducted at different power levels and rf pulse widths. The structure was standard T24 CLIC test structure and was tested in Xbox-3 at CERN.
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Poster TUPAB076 [1.077 MB]
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2021-TUPAB076
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| About • |
paper received ※ 19 May 2021 paper accepted ※ 12 July 2021 issue date ※ 12 August 2021 |
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| FRXB02 |
Development of 36 GHz RF Systems for RF Linearisers |
4518 |
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- A. Castilla, G. Burt
Lancaster University, Lancaster, United Kingdom
- M. Behtouei, B. Spataro
INFN/LNF, Frascati, Italy
- G. Burt
Cockcroft Institute, Warrington, Cheshire, United Kingdom
- J.C. Cai, A. Castilla, A. Latina, X. Liu, I. Syratchev, X.W. Wu, W. Wuensch
CERN, Meyrin, Switzerland
- J.C. Cai, A. Castilla
Cockcroft Institute, Lancaster University, Lancaster, United Kingdom
- A.W. Cross, L. Zhang
USTRAT/SUPA, Glasgow, United Kingdom
- L.J.R. Nix
University of Strathclyde, Glasgow, United Kingdom
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Funding: This project has received funding from the European Union’s Horizon2020 research and innovation programme under grant agreement No 777431.
As part of the deign studies, the CompactLight project plans to use an injector in the C-band. Which constitutes a particular complication for the harmonic system in charge of linearising the beam’s phase space, since it means its operation frequency could be higher than the standard X-band RF technologies. In the present work, we investigated a 36 GHz (Ka-band) as the ideal frequency for the harmonic system. A set of structure designs are presented as candidates for the lineariser, based on different powering schemes and pulse compressor technologies. The comparison is made both in terms of beam dynamics and RF performance. Given the phase stability requirements for the MW class RF sources needed for this system, we performed careful studies of a Gyro-Klystron and a multi-beam klystron as potential RF sources, with both showing up to 3 MW available power using moderate modulator voltages. Alternatives for pulse compression at Ka-band are also discussed in this work.
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| DOI • |
reference for this paper
※ https://doi.org/10.18429/JACoW-IPAC2021-FRXB02
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| About • |
paper received ※ 17 May 2021 paper accepted ※ 19 July 2021 issue date ※ 25 August 2021 |
|
| Export • |
reference for this paper using
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※ LaTeX,
※ Text/Word,
※ RIS,
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