• High Power Laser and Particle Beams
  • Vol. 33, Issue 9, 095002 (2021)
Yunhai Li1, Xiang Guo2, Rong Yang1, Zheng Ruan2, Yi Tong1, and Xiaofeng Xie1
Author Affiliations
  • 1Hefei LeiKe Electronics Technology Co, Ltd, Hefei 230094, China
  • 2ECU Electronics Industrial Co, Ltd, Hefei 230088, China
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    DOI: 10.11884/HPLPB202133.210220 Cite this Article
    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 Copy Citation Text show less
    Schematic diagram of solid state modulator system
    Fig. 1. Schematic diagram of solid state modulator system
    Photo and test waveforms of discharge module
    Fig. 2. Photo and test waveforms of discharge module
    Structure principle and model diagram of fractional-turn ratio pulse transformer
    Fig. 3. Structure principle and model diagram of fractional-turn ratio pulse transformer
    Simulation waveform of modulator output voltage
    Fig. 4. Simulation waveform of modulator output voltage
    Electric field simulation of pulse transformer
    Fig. 5. Electric field simulation of pulse transformer
    Magnetic field simulation of pulse transformer
    Fig. 6. Magnetic field simulation of pulse transformer
    Photos of pulse transformer
    Fig. 7. Photos of pulse transformer
    Photo of engineering prototype test site
    Fig. 8. Photo of engineering prototype test site
    Test waveforms of engineering prototype
    Fig. 9. Test waveforms of engineering prototype
    typebeam voltage/kVbeam current/Afrequency/GHzpeak power/MWaverage power/kWgain/dBefficiency/%duty/%
    E3730A3123602.8565110.551450.020
    VKX-8311A41031011.99450548400.009
    Table 1. Klystron parameters
    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 2. Design parameters of pulse modulator
    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 3. Inductance distribution table of discharge circuit
    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 4. Test data of engineering prototype
    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
    Table 5. Test data comparison
    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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