Low-level RF control of a klystron for medical linear accelerator applications

被引:2
|
作者
Min, Sun-Hong [1 ,2 ]
Kwon, Ohjoon [3 ]
Sattorov, Matlabjon [2 ,4 ]
Kim, Seontae [2 ]
Hong, Dongpyo [2 ]
Park, Chawon [1 ]
Hong, Bong Hwan [1 ]
Jung, In Su [1 ]
Cho, Ilsung [1 ]
Hwang, Won Taek [1 ]
Barik, Ranjan Kumar [5 ]
Bera, Anirban [5 ]
Park, Gun-Sik [2 ,4 ]
机构
[1] Korea Inst Radiol & Med Sci KIRAMS, Seoul 01812, South Korea
[2] Seoul Natl Univ, Dept Phys & Astron, Ctr THz Driven Biomed Syst, Seoul 08826, South Korea
[3] Ctr Axion & Precis Phys Res, Inst Basic Sci, Daejeon 34141, South Korea
[4] Seoul Teracom Inc, Suwon 16229, Gyeonggi Do, South Korea
[5] Cent Elect Engn Res Inst, Council Sci & Ind Res, Pilani 333031, Rajasthan, India
基金
新加坡国家研究基金会;
关键词
Control systems - Pulse repetition rate - Modulators - Klystrons;
D O I
10.1063/1.5084172
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
A klystron is an important vacuum device which is useful in medical linear accelerators because it amplifies the radio-frequency (RF) signals required to produce high-energy particle beams. The properties of the nonlinear input and output dynamics in the klystron circuit arouse distortion in various types of parameters pertaining to the beam voltage, beam current, RF power, and operating frequency from unpredictable external factors. Therefore, low-level RF (LLRF) control systems can facilitate the regulation of the output of the klystron to a desired level. Low-level RF control system of the klystron is designed to stabilize the applied voltage and control the resonance frequency of the cavity of the klystron. In this work, an infallible low-level RF control system, the most suitable for a klystron, is designed to use a beam monitoring and an interlock system with components that include an isolator and a phase shifter. Moreover, with regard to pulse distortion at the flap top at the RF output power, the stability of the RF power pulse at the flap top part was improved somewhat by a variable inductor which controlled the inside of the pulse modulator. In this LLRF control experiment, the pulse modulator generated 140kV-95A and succeeded in generating RF output power of 2.856GHz-6MW level of an S-band klystron. During this process, the efficiency of the RF power was approximately 42 similar to 45% and the pulse repetition rate was 10 Hz. The flattop pulse width was measured and found to be 1 mu s. (C) 2019 Author(s).
引用
收藏
页数:14
相关论文
共 50 条
  • [1] Low-level RF signal processing for the next linear collider test accelerator
    Holmes, S
    Ziomek, C
    Adolphsen, C
    Akre, R
    Allison, S
    Clark, S
    Dean, T
    Fuller, RW
    Gold, S
    Jobe, RK
    Koontz, R
    Lavine, TL
    Nantista, C
    Wilson, Z
    Young, A
    [J]. PROCEEDINGS OF THE 1997 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-3: PLENARY AND SPECIAL SESSIONS ACCELERATORS AND STORAGE RINGS - BEAM DYNAMICS, INSTRUMENTATION, AND CONTROLS, 1998, : 3027 - 3029
  • [2] LOW-LEVEL RF CONTROL FOR THE AFEL
    ZIOMEK, CD
    KINROSSWRIGHT, JM
    PLATO, JG
    [J]. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 1995, 358 (1-3): : ABS87 - ABS88
  • [3] Improvement of the Low-level RF Control System for the PEFP 100-MeV Proton Accelerator
    Seol, Kyung-Tae
    Kwon, Hyeok-Jung
    Kim, Han-Sung
    Song, Young-Gi
    Cho, Yong-Sub
    [J]. JOURNAL OF THE KOREAN PHYSICAL SOCIETY, 2011, 59 (02) : 627 - 630
  • [4] LOW-FREQUENCY KLYSTRON FOR ACCELERATOR APPLICATIONS
    TALLERICO, PJ
    [J]. IEEE TRANSACTIONS ON NUCLEAR SCIENCE, 1977, 24 (03) : 1692 - 1694
  • [5] Algorithms for the implementation of a low level RF control system for a klystron amplifier
    Poggi, Tomaso
    [J]. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2013, 729 : 506 - 516
  • [6] Experimental Evaluation of Sub-Sampling IQ Detection for Low-Level RF Control in Particle Accelerator Systems
    Kowalski, Tomasz
    Gibiino, Gian Piero
    Szewinski, Jaroslaw
    Czuba, Krzysztof
    Rybka, Dominik
    Chmielewski, Konrad
    Wojciechowski, Zbigniew
    Sitek, Maciej
    [J]. SENSORS, 2022, 22 (01)
  • [7] Low-level rf system design for the accelerator test facility (ATF) damping ring
    Minty, MG
    Kubo, K
    Hinode, F
    Sakanaka, S
    Urakawa, J
    [J]. PROCEEDINGS OF THE 1997 PARTICLE ACCELERATOR CONFERENCE, VOLS 1-3: PLENARY AND SPECIAL SESSIONS ACCELERATORS AND STORAGE RINGS - BEAM DYNAMICS, INSTRUMENTATION, AND CONTROLS, 1998, : 354 - 356
  • [8] Digital low-level RF conctrols for future Superconducting Linear Colliders
    Simrock, SN
    [J]. 2005 IEEE PARTICLE ACCELERATOR CONFERENCE (PAC), VOLS 1-4, 2005, : 19 - 23
  • [9] SNS low-level RF control system: Design and performance
    Ma, HJ
    Champion, M
    Crofford, M
    Kasemir, KU
    Piller, M
    Doolittle, L
    Rotti, A
    [J]. 2005 IEEE PARTICLE ACCELERATOR CONFERENCE (PAC), VOLS 1-4, 2005, : 4292 - 4294
  • [10] Low level RF control system development for the PEFP proton accelerator
    Kim, Han-Sung
    Kwon, Hyeok-Jung
    Seol, Kyung-Tae
    Song, Young-Gi
    Hong, In-Seok
    Cho, Yong-Sub
    [J]. JOURNAL OF THE KOREAN PHYSICAL SOCIETY, 2007, 50 (05) : 1431 - 1437