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1.
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
2.
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
3.
Accurate Modeling of Monotron Oscillations in Small- and Large-Signal Regimes / Cai, Jinchi (Lancaster U. (main)) ; Syratchev, Igor (CERN) ; Burt, Graeme (Lancaster U. (main))
In Klystron amplifiers, monotron oscillations may cause unacceptable beam instabilities. For facilitating fast and accurate analysis of such processes, rather than performing time-consuming particle-in-cell simulations, the theory of the monotron oscillations has been further developed for the small- and large-signal regimes and implemented into the klystron computer code KlyC. This development includes full considerations of the spacecharge effects, relativistic effects and can operate with arbitrary field distributions of the resonant mode. [...]
2020 - 7 p. - Published in : IEEE Trans. Electron Devices 67 (2020) 1797-1803
4.
Modeling of Coupled Cell Output Structures for the Klystrons / Cai, J C (CERN) ; Syratchev, I (CERN)
High-frequency, high-power klystrons proved to be significant for application in compact particle accelerators, high-resolution radars, and fast data communication systems. As most of the linear beam devices, the performance of the klystron deteriorates progressively with an increasing operating frequency due to the reduction of individual RF cavity impedances. [...]
2019 - 6 p. - Published in : IEEE Trans. Electron Devices 66 (2019) 4964-4969
5.
KlyC: 1.5-D large-signal simulation code for klystrons / Cai, Jinchi (CERN) ; Syratchev, Igor (CERN)
The High Efficiency International Klystron Activity (HEIKA) was initiated at CERN in 2014 to evaluate and develop new klystron bunching technologies for high-efficiency klystrons in application to the large-scale scientific projects such as the Compact Linear Collider (CLIC) and the Future Circular Collider (FCC). The success of such development strongly depends on the availability of the specialized klystron computer codes. [...]
2019 - 8 p. - Published in : IEEE Trans. Plasma Sci. 47 (2019) 1734-1741
6.
KlyC. The 1D/1.5D large signal computer code for the klystron simulations. User manual. / Cai, Jinchi (CERN) ; Syratchev, Igor (CERN)
Almost all the accurate and efficient 2D large-signal codes for the klystron simulations are proprietary and are not freely available to the wide klystron community. [...]
CERN-ACC-2018-0050 ; CLIC-Note-1137.
- 2018 - 18.
Full text
7.
KlyC. The 1D/1.5D large signal computer code for the Klystron simulations. User Manual. Version 6. (included CGUN for the 2D electron beam optics simulation). / Cai, Jinchi (Lancaster University (GB)) ; Syratchev, Igor (CERN) ; Burt, Graeme Campbell (Lancaster University (GB))
Almost all accurate and efficient 2D large-signal codes for klystron simulations are proprietary and are not freely available to the wider klystron community [...]
CERN-ACC-2022-0008 ; CLIC-Note-1177.
- 2022 - 31.
Full text
8.
Beam-Wave Interaction in a Quasi-Periodic Structure / Schächter, L ; Nation, J A
1993 External link: Published version from JACoW
In : 15th IEEE Particle Accelerator Conference, Washington, DC, USA, 17 - 20 May 1993, pp.2684
9.
Beam Optics Study on a Two-Stage Multibeam Klystron for the Future Circular Collider / Cai, Jinchi (UESTC, Chengdu) ; Nisa, Zaib un (CERN) ; Syratchev, Igor (CERN) ; Burt, Graeme (Lancaster U.)
The two-stage (TS) multibeam klystron (MBK) technology has recently attracted significant research attention due to its compactness and high-efficiency (HE) performance. However, there is still a lack of scientific research on the beam optics for such microwave power sources integrated with a postacceleration (PA) gap. [...]
2022 - 9 p. - Published in : IEEE Trans. Electron Devices 69 (2022) 4563-4571
10.
Numerical Analysis of Resonant Multipolar Instabilities in High Power Klystrons / Cai, Jinchi (Lancaster U.) ; Syratchev, Igor (CERN) ; Burt, Graeme (Lancaster U.)
The monopole monotron instability is a well-known phenomenon in linear beam devices. In recent development of a high-efficiency 50-MW X-band klystron, such instabilities were found and mitigated in a special second-harmonic multicell cavities triplet that is used to improve the klystron's performance. [...]
2021 - 5 p. - Published in : IEEE Trans. Electron Devices 68 (2021) 3617-3621

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