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Chinese Physics C> 2014, Vol. 38> Issue(4) : 047004 DOI: 10.1088/1674-1137/38/4/047004

Design of an electron gun for terahertz radiation source

  • An EC-ITC (External-Cathode Independently Tunable Cells) RF gun was employed with the aim of obtaining short-pulse bunches with high peak current for a terahertz radiation source. A gridded DC gun plays a key role as the external injecting electron source of the ITC RF gun, the performance of which determines the beam quality in the injector and transport line. In order to make the beam well compressed in the ITC RF gun, the energy of the electrons acquired from the gridded DC gun should be 15 keV at most. A proper structure of the gridded gun with double-anode is shown to overcome the strong space- charge force on the cathode, which is able to generate 6 μs beam with 4.5 A current successfully.
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    [1] XIONG Yong-Qian et al. HEP NP, 2008, 32(Supplement I): 301 (in Chinese)[2] Stephan F et al. PRST-AB, 2010, 13(2): 020704-2[3] Tanaka T et al. An Independently Tunable Cells Thermionic RF Gun (ITC-RF Gun) for Sub-picosecond Short Pulse. Proc. of the 27th International Free Electron Laser Conference. 2005[4] PANG Jian et al. High Power Laser and Particle Beams, 2009, 21(7): 1063 (in Chinese)[5] PANG Jian. Research and Development of Independently Tunable Cells RF Gun with External Injecting Structure (Ph.D. Thesis). Hefei: University of Science and Technology, 2010 (in Chinese)[6] LAACG. Poisson-Superfish User Manual. LANL, 2002[7] LIU Zu-Ping. Beam Optics. Hefei, Anhui: Press of University of Science and Technology, 2005. 27[8] VECTOR FIELDS. OPERA-3D User Guide. 2000[9] WANG Jin-Nan et al. Nuclear Electronics Detection Technology, 2011, 31(4): 404 (in Chinese)[10] CST, CST Particle Studio User Manual. 2006[11] YOUNG L. PARMELA User Manual. LANL, 1998

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LI Ji, PEI Yuan-Ji, HU Tong-Ning, CHEN Qu-Shan, FENG Guang-Yao, SHANG Lei and LI Cheng-Long. Design of an electron gun for terahertz radiation source[J]. Chinese Physics C, 2014, 38(4): 047004. doi: 10.1088/1674-1137/38/4/047004
LI Ji, PEI Yuan-Ji, HU Tong-Ning, CHEN Qu-Shan, FENG Guang-Yao, SHANG Lei and LI Cheng-Long. Design of an electron gun for terahertz radiation source[J]. Chinese Physics C, 2014, 38(4): 047004.  doi: 10.1088/1674-1137/38/4/047004 shu
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Received: 2013-06-04
Revised: 1900-01-01
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Design of an electron gun for terahertz radiation source

    Corresponding author: LI Ji,
  • Received Date: 2013-06-04
  • Accepted Date: 1900-01-01
  • Available Online: 2014-04-05

Abstract: An EC-ITC (External-Cathode Independently Tunable Cells) RF gun was employed with the aim of obtaining short-pulse bunches with high peak current for a terahertz radiation source. A gridded DC gun plays a key role as the external injecting electron source of the ITC RF gun, the performance of which determines the beam quality in the injector and transport line. In order to make the beam well compressed in the ITC RF gun, the energy of the electrons acquired from the gridded DC gun should be 15 keV at most. A proper structure of the gridded gun with double-anode is shown to overcome the strong space- charge force on the cathode, which is able to generate 6 μs beam with 4.5 A current successfully.

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