High Power Laser and Particle Beams, Volume. 33, Issue 9, 095002(2021)

Fractional-turn ratio solid-state modulator for 50 MW klystron

Yunhai Li1... Xiang Guo2, Rong Yang1, Zheng Ruan2, Yi Tong1 and Xiaofeng Xie1 |Show fewer author(s)
Author Affiliations
  • 1Hefei LeiKe Electronics Technology Co, Ltd, Hefei 230094, China
  • 2ECU Electronics Industrial Co, Ltd, Hefei 230088, China
  • show less
    Figures & Tables(14)
    Schematic diagram of solid state modulator system
    Photo and test waveforms of discharge module
    Structure principle and model diagram of fractional-turn ratio pulse transformer
    Simulation waveform of modulator output voltage
    Electric field simulation of pulse transformer
    Magnetic field simulation of pulse transformer
    Photos of pulse transformer
    Photo of engineering prototype test site
    Test waveforms of engineering prototype
    • Table 1. Klystron parameters

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      Table 1. Klystron parameters

      typebeam voltage/kVbeam current/Afrequency/GHzpeak power/MWaverage power/kWgain/dBefficiency/%duty/%
      E3730A3123602.8565110.551450.020
      VKX-8311A41031011.99450548400.009
    • Table 2. Design parameters of pulse modulator

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      Table 2. Design parameters of pulse modulator

      pulse voltage/kV pulse current/A repetition rate/Hz flat top pulse duration/μs charge power voltage/kV pulse flatness/% pulse-pulse regulation/% rise time (10%~90%)/μs fall time (90%~10%)/μs
      ≥312≥360504≤1.251(p-p)0.1(p-p)≤1.5≤1.5
    • Table 3. Inductance distribution table of discharge circuit

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      Table 3. Inductance distribution table of discharge circuit

      iteminductance/μH
      discharge unit<0.05
      discharge cable<0.05
      pulse transformer connection<0.1
      pulse transformer leakage inductance (after three coils in parallel) <0.2
    • Table 4. Test data of engineering prototype

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      Table 4. Test data of engineering prototype

      parameterpulse voltage/kV pulse curren/A repetition rate/Hz flat top pulse duration/μs rise time (10%~90%)/μs fall time (90%~10%)/μs pulse top fluctuation/% pulse top down/% charge power voltage/kV discharge pulse current/A
      0.80 kΩ resistance load 313394504.01.461.390.162.6711502070
      1.23 kΩ resistance load 315257102.50.951.011.811001380
      0.77 kΩ water load 301393504.31.381.270.482.610802130
    • Table 5. Test data comparison

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      Table 5. Test data comparison

      reference No. pulse voltage/kV pulse curren/A load impedance/kΩ peak power/MW repetition rate/Hz flat top pulse duration/μs rise time (10%~90%)/μs fall time (90%~10%)/μs charge power voltage/kV principle
      113254000.811301021.01.850.0PFN
      124506000.75270502.51.11.726.5PFN
      134504001.131801002~100.54.5solid state
      143504140.851451203.51.51.03.0solid state
      158020000.041605020.62.02.0solid state
      this article3013930.77118504.31.381.271.25solid state
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    Yunhai Li, Xiang Guo, Rong Yang, Zheng Ruan, Yi Tong, Xiaofeng Xie. Fractional-turn ratio solid-state modulator for 50 MW klystron[J]. High Power Laser and Particle Beams, 2021, 33(9): 095002

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    Paper Information

    Category: Pulsed Power Technology

    Received: Jun. 3, 2021

    Accepted: --

    Published Online: Oct. 9, 2021

    The Author Email:

    DOI:10.11884/HPLPB202133.210220

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