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Chinese Physics C> 2005, Vol. 29> Issue(7) : 700-704 

The Research of Multi-cell Thermionic RF Gun Injector Based on X-band DAW Accelerating Structure

  •  Department of Engineering Physics,Tsinghua University,Beijing 100084,China

  • A multi-cell thermionic RF gun injector based on X-band(11.43GHz) Disk-and-Washer(DAW) accelerating structure has been developed. The influence to the RF characteristic of the washer supports and the mode overlap problem of DAW structure are analysed in this paper. Becaus DAW accelerating structure has a large coupling coefficient and the next nearest neighbour coupling can't be ignored, a special tuning method was developed. The results of dynamic simulation of this injector are given. Simulation shows the gun can accelerate electron beams of 40mA to 5—6MeV, with an emittance of 3.4π.mm.mrad. Manufacture and brazing of the RF gun have been finished, and the cold test results of it are also presented.
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    [1] . Andreev V G et al. Study of High-Energy Prot on Linac Structure. Proc.of 1972 Proton Linac Conf , 1972.-1142. Inagki S et al. Development of Disk-and-Washer in KEK. IEEE Trans.on Nuclear Science, 1983, NS-30: 35923. Moret ti A et al. An 805MHz Disk andWasher Structure for the FermilabLinac Upgrade. Feimilab-Conf-88/ 145, Oct ober4. Schriber S O. High Beta Linac Structure. Proc. of LINAC'79, Mon-tauk, September 19795. Nezhevenko O A et al. Electron Preinjector for SIBERIA-2 SR Source.Proc. of PAC'91, 1991, 3186-31886. Shigemi Inagaki. Disk-and-Washer Cavities for an Accelerat or. N. I. M.in Physics Research A, 1986, 251: 417-4367. Nezhevenko O A et al. Performance of X-Band PulsedMagnicon Ampli-fier. Proc. of PAC'03. 1128-11308. HU Yuan et al . HEP NP, 2001, 25(9) : 914-919(in Chinese)(胡源等高能物理与核物理，2001, 25(9): 914-919)9. Wangler T P. Principle of RF Linear Accelerators. New York: JohnWiley Sons, Inc. , 1998

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HU Yuan, TANG Chuan-Xiang, CHEN Huai-Bi, TONG De-Chun and LIN Yu-Zheng. The Research of Multi-cell Thermionic RF Gun Injector Based on X-band DAW Accelerating Structure[J]. Chinese Physics C, 2005, 29(7): 700-704.
HU Yuan, TANG Chuan-Xiang, CHEN Huai-Bi, TONG De-Chun and LIN Yu-Zheng. The Research of Multi-cell Thermionic RF Gun Injector Based on X-band DAW Accelerating Structure[J]. Chinese Physics C, 2005, 29(7): 700-704. shu
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Received: 2004-10-29
Revised: 2004-11-15
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The Research of Multi-cell Thermionic RF Gun Injector Based on X-band DAW Accelerating Structure

    Corresponding author: TANG Chuan-Xiang,
  • Department of Engineering Physics,Tsinghua University,Beijing 100084,China
  • Received Date: 2004-10-29
  • Accepted Date: 2004-11-15
  • Available Online: 2005-07-05

Abstract: A multi-cell thermionic RF gun injector based on X-band(11.43GHz) Disk-and-Washer(DAW) accelerating structure has been developed. The influence to the RF characteristic of the washer supports and the mode overlap problem of DAW structure are analysed in this paper. Becaus DAW accelerating structure has a large coupling coefficient and the next nearest neighbour coupling can't be ignored, a special tuning method was developed. The results of dynamic simulation of this injector are given. Simulation shows the gun can accelerate electron beams of 40mA to 5—6MeV, with an emittance of 3.4π.mm.mrad. Manufacture and brazing of the RF gun have been finished, and the cold test results of it are also presented.

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