CERN Accelerating science

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1.
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
2.
High-Efficiency Klystron Tests at the CERN Xbox3 Facility / Webber, Margaret Mcguinn
Klystrons are a type of radio-frequency amplifier widely used in high-energy physics. [...]
CERN-STUDENTS-Note-2024-070.
- 2024
Access to fulltext
3.
Advances on LHC RF Power Limitation Studies at Injection / Timko, Helga (CERN) ; Argyropoulos, Theodoros (CERN) ; Calaga, Rama (CERN) ; Catalán Lasheras, Nuria (CERN) ; Iliakis, Konstantinos (CERN) ; Karlsen-Bæck, Birk Emil (CERN ; Rome U.) ; Karpov, Ivan (CERN) ; Zampetakis, Michail (CERN)
The average power consumption of the main RF system during beam injection in the High-Luminosity Large Hadron Collider is expected to be close to the maximum available klystron power. Power transients due to the mismatch of the beam and the action of control loops will exceed the available power. [...]
2024 - 4 p. - Published in : JACoW HB 2023 (2024) 567-570 Fulltext: PDF;
In : 68th ICFA Advanced Beam Dynamics workshop on high-Intensity and High-Brightness Hadron Beams (HB 2023), CERN, Geneva, Switzerland, 9 - 13 Oct 2023, pp.567-570
4.
DC Powering Solutions for the Future Circular Collider: Converter Topologies, Protection, and Control / Colmenero, Manuel (CERN) ; Blanquez, Francisco Rafael (CERN) ; Blasco-Gimenez, Ramon (Valencia U., IFIC)
The future circular collider (FCC) is a cutting-edge particle accelerator being planned by the European Organization for Nuclear Research (CERN). It is designed to delve deeper into the mysteries of the universe than its predecessor, the large hadron collider (LHC). [...]
2023 - 15 p. - Published in : IEEE Open J. Indust. Electron. Soc. 4 (2023) 694-708 Fulltext: PDF;
5.
RF design of the waveguide network for the klystron-based CLIC module / Wang, P (CERN) ; Capstick, M (CERN) ; Catalan Lasheras, N (CERN) ; Doebert, S (CERN) ; Grudiev, A (CERN) ; Rossi, C (CERN) ; Sanchez, P Morales (CERN) ; Syratchev, I (CERN) ; Wu, X (CERN)
A new RF Module was designed for the Klystron-based CLIC main linac. The new module deploys two X-band klystrons to feed eight CLIC-K accelerating structures giving a beam energy increase of 156 MeV. [...]
2023 - 4 p. - Published in : JACoW IPAC 2023 (2023) WEPA114 Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.WEPA114
6.
RF design of the pulse compression system for the klystron-based CLIC main linac / Wang, P (CERN) ; Grudiev, A (CERN)
A pulse compression system based on double-height waveguides was designed for the Klystron-based CLIC main linac. The optimized power gain of the system is 3.81 with the particular pulse shape required for the CLIC-K accelerating structure. [...]
2023 - 4 p. - Published in : JACoW IPAC 2023 (2023) WEPA115 Fulltext: PDF;
In : 14th International Particle Accelerator Conference (IPAC 2023), Venice, Italy, 7 - 12 May 2023, pp.WEPA115
7.
KlyC expansion: Traveling wave module in Klystron simulation code / Cai, Jinchi (UESTC, Chengdu) ; Li, Wei (UESTC, Chengdu) ; Su, Zixuan (UESTC, Chengdu) ; Xu, Jin (UESTC, Chengdu) ; Yue, Linna (UESTC, Chengdu) ; Yin, Hairong (UESTC, Chengdu) ; Yin, Pengcheng (UESTC, Chengdu) ; Zhao, Guoqing (UESTC, Chengdu) ; Wang, Wenxiang (UESTC, Chengdu) ; Wei, Yanyu (UESTC, Chengdu) et al.
Since Klystron simulation code KlyC was released in 2017, it has been used for the design of series of high efficiency (HE) Klystron projects. Lots of new features such as coupling mode analysis, monotron diagnosis and complete small signal theory have been implemented into KlyC to facilitate sophisticated Klystron design. [...]
2023 - 2 p. - Published in : 10.1109/IVEC56627.2023.10157204
In : 24th IEEE International Vacuum Electronics Conference (IVEC 2023), Chengdu, China, 26 - 28 Apr 2023
8.
Multi-port modular multilevel converters for the supply of the future circular collider two-stage klystrons / Colmenero, M (CERN) ; Vidal-Albalate, R (Jaume I U., Castellon) ; Blanquez, F Rafael (CERN) ; Blasco-Gimenez, R (Valencia, Polytechnic U.)
The new generation of high-efficiency klystrons for future particle colliders requires two high-voltage, series-connected power supplies. As an alternative to conventional klystron power converters, the use of Multi-port Modular Multilevel Converters with three DC output terminals is proposed. [...]
2023 - 7 p. - Published in : 10.1049/icp.2023.1405
In : 19th International Conference on AC and DC Power Transmission (ACDC 2023), Glasgow, UK, 1 - 3 Mar 2023, pp.334-340
9.
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;
10.
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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