Title :
Simulation and experiment on relativistic Klystron Amplifier driven by strong input power
Author :
Song, Wei ; Lin, Yuzheng ; Liu, Guozhi ; Zhang, Xiaowei ; Ding, Zhenjie ; Zhang, Yonghua ; Sun, Jun ; Hao, Qingsong
Author_Institution :
Dept. of Eng. Phys., Tsinghua Univ., Beijing
Abstract :
This paper presents proposes a method of improving the input power to inhibit parasitic oscillations. Particle-in-cell simulation results indicate that the relativistic klystron amplifier driven by strong input power is a potential device to attain high stability, high efficiency, wide bandwidth, and frequency and phase locking. An electron beam of 200 keV, 1k A is used in simulation. Under the condition of 5 MW external power feeding, about 0.9 kA modulation current is obtained with only one cavity. The output microwave power is 70 MW, with 5% bandwidth and 40% efficiency. The experiment is carried out at SPG200 accelerator, the typical diode voltage and current of which are 200kV and 1 kA, respectively. An S band klystron with peak power about 4 MW is used as inputs.
Keywords :
klystrons; microwave amplifiers; S band; SPG200 accelerator; current 1 kA; electron beam; electron volt energy 200 keV; external power feeding; input power; modulation current; output microwave power; particle-in-cell simulation; phase locking; power 5 MW; power 70 MW; relativistic klystron amplifier; voltage 200 kV; Bandwidth; Diodes; Electron beams; Frequency; High power amplifiers; Klystrons; Microwave devices; Power amplifiers; Stability; Voltage;
Conference_Titel :
Plasma Science, 2008. ICOPS 2008. IEEE 35th International Conference on
Conference_Location :
Karlsruhe
Print_ISBN :
978-1-4244-1929-6
Electronic_ISBN :
0730-9244
DOI :
10.1109/PLASMA.2008.4590666
