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Integration of FCC-ee RF systems targets and challenges
/ Valchkova-Georgieva, Fani (Unlisted, CH) ; Brunner, Olivier (CERN) ; Burnet, Jean-Paul (CERN) ; Coupard, Julie (CERN) ; Hanke, Klaus (CERN) ; Parma, Vittorio (CERN) ; Peauger, Franck (CERN)
Following the study progress on the FCC-ee radiofrequency systems (i.e. length of the cryomodules), general services infrastructure (i.e. [...]
2024 - 4 p.
- Published in : JACoW IPAC 2024 (2024) THPS49
Fulltext: PDF;
In : 15th International Particle Accelerator Conference (IPAC 2024), Nashville, TN, United States, 19 - 24 May 2024, pp.THPS49
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2.
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Multipactor studies for the FCC–ee superconducting swell cavities
/ Plaçais, Adrien (LPSC, Grenoble) ; Bouly, Frédéric (LPSC, Grenoble) ; Gómez Martínez, Yolanda (LPSC, Grenoble) ; Meyer, Manon (LPSC, Grenoble) ; Faus-Golfe, Angeles (IJCLab, Orsay) ; Peauger, Franck (CERN) ; Gorgi Zadeh, Shahnam (CERN)
The Future Circular Collider (FCC) is a project of high performance particle collider. Several accelerating cavity technologies may equip it and are currently under study. [...]
2023 - 4 p.
- Published in : JACoW IPAC 2023 (2023) WEPA179
Fulltext: document - PDF; PDF small 4 - PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.WEPA179
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3.
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Design, Fabrication, and Test of a 5 GHz Klystron Based on the Kladistron Principle
/ Plouin, Juliette (Saclay) ; Marchand, Claude (Saclay) ; Hamel, Pierrick (Saclay) ; Arsenyev, Sergey (Saclay) ; Mollard, Antoine (Thales Electron Devices, Velizy) ; Beunas, Armel (Thales Electron Devices, Velizy) ; Denis, Philippe (Thales Electron Devices, Velizy) ; Peauger, Franck (CERN)
A new bunching method, named "kladistron" has been developed at CEA in order to provide high efficiency klystrons. A first "kladistron" prototype was designed and realized. [...]
arXiv:2404.05493.-
2023-03 - 8 p.
- Published in : IEEE Trans. Electron Devices 70 (2023) 1275-1282
Fulltext: PDF;
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Exploratory Study on High-Efficiency High-Power W-Band Klystron Based on Kladistron Technology
/ Cai, J C (UESTC, Chengdu) ; Su, Z X (UESTC, Chengdu) ; Peauger, F (CERN) ; Xu, J (UESTC, Chengdu) ; Burt, G (Lancaster U. (main)) ; Yue, L N (UESTC, Chengdu) ; Yin, H R (UESTC, Chengdu) ; Zhao, G Q (UESTC, Chengdu) ; Xiang, W W (UESTC, Chengdu) ; Wei, Y Y (UESTC, Chengdu)
To achieve tens of kilowatt (kW) output power,
${W}$
-band klystron usually employs a large beam tunnel to accommodate high current. The deteriorated effective impedance of the cavity could be reenhanced by adopting extended interaction (EI) cavities. [...]
2023 - 6 p.
- Published in : IEEE Trans. Plasma Sci. 51 (2023) 386-391
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5.
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Progress and R/D challenges for FCC-ee SRF
/ Venturini Delsolaro, W (CERN) ; Garlasche, M (CERN) ; Peauger, F (CERN) ; Rosaz, G (CERN) ; Karpov, I (CERN) ; Zhang, L (Beijing, Inst. High Energy Phys.) ; Valente Feliciano, A M (Jefferson Lab) ; Udongwo, S A (Rostock U.) ; Bianchi, A (CERN) ; Bellini, G (CERN) et al.
The FCC-ee machines present a huge challenge for the RF systems, which need to be adapted to very diverse beam conditions going from moderate energy and high current for the Z machine to high energy and low beam current for the ttbar. This inverse scaling results naturally from a fixed budget for the synchrotron radiation, which the SRF cavities need to compensate. [...]
2023 - 13 p.
- Published in : EPJ Tech. Instrum. 10 (2023) 6
Fulltext: PDF;
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Degradation and Recovery of the LHC RF Cryomodule Performance Using the Helium Processing Technique
/ Turaj, Katarzyna (CERN) ; Brunner, Olivier (CERN) ; Butterworth, Andrew (CERN) ; Gerigk, Frank (CERN) ; Maesen, Pierre (CERN) ; Montesinos, Eric (CERN) ; Peauger, Franck (CERN) ; Therasse, Mathieu (CERN) ; Venturini Delsolaro, Walter (CERN)
The LHC RF cryomodule "Asia" suffered an accidental influx of about 0.5 l of tunnel air during the leak checks of the pumping manifolds. The resulting risk of particle contamination was difficult to assess, and could not be excluded with certainty. [...]
2022 - 5 p.
- Published in : JACoW SRF 2021 (2022) 746-750
Fulltext: PDF;
In : 20th International Conference on RF Superconductivity (SRF 2021), Online, US, 28 Jun - 2 Jul 2021, pp.746-750
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SWELL and Other SRF Split Cavity Development
/ Peauger, F (CERN) ; Brunner, O (CERN) ; Garlasche, M (CERN) ; Zadeh, S Gorgi (CERN) ; Koettig, T (CERN) ; Rosaz, G (CERN) ; Syratchev, I (CERN) ; Timmins, M (CERN) ; Therasse, M (CERN) ; Venturini Delsolaro, W (CERN) et al.
An innovative superconducting cavity topology has been recently proposed at CERN. It integrates longitudinal waveguide slots crossing perpendicularly the RF surface to damp transverse higher order modes. [...]
2022 - 5 p.
- Published in : JACoW LINAC 2022 (2022) 300-304
Fulltext: PDF;
In : 31st Linear Accelerator Conference (LINAC22), Liverpool, UK, 28 Aug - 2 Sep 2022, pp.300-304
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9.
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Fabrication and test of a 5 GHz kladistron
/ Plouin, Juliette (U. Paris-Saclay) ; Marchand, Claude (U. Paris-Saclay) ; Hamel, Pierrick (U. Paris-Saclay) ; Arsenyev, Sergey (U. Paris-Saclay) ; Mollard, Antoine (Thales Electron Devices, Velizy) ; Beunas, Armel (Thales Electron Devices, Velizy) ; Peauger, Franck (CERN)
A 5 GHz klystron of type “kladistron” has been designed and realized. It was adapted from the TH2166 from Thales, where the interaction line was transformed from 6 to 16 cavities. [...]
2021 - 2 p.
- Published in : 10.1109/IVEC51707.2021.9722532
In : 22nd IEEE International Vacuum Electronics Conference (IVEC 2021), Online, US, 27 - 30 Apr 2021
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