Bulletin of the American Physical Society
75th Annual Gaseous Electronics Conference
Monday–Friday, October 3–7, 2022;
Sendai International Center, Sendai, Japan
The session times in this program are intended for Japan Standard Time zone in Tokyo, Japan (GMT+9)
Session HT4: Poster Session I (4:00-6:00pm, JST)
4:00 PM,
Tuesday, October 4, 2022
Sendai International Center
Room: Sakura 1
Abstract: HT4.00054 : Research on current filament mechanism of nonlinear semi-insulation GaAs photoconductive semiconductor switches*
Presenter:
Cheng Ma
(Xi'an University of Technology)
Authors:
Cheng Ma
(Xi'an University of Technology)
Wei Shi
(Xi'an University of Technology and The Key Laboratory of Ultrafast Photoelectric Technology and Terahertz Science in Shaanxi)
Lei Hou
(Xi'an University of Technology)
Hong Liu
(Xi'an University of Technology)
Yue Wang
(Xi'an University of Technology)
Liqiang Tian
(Xi'an University of Technology)
Lei Yang
(Xi'an University of Technology)
Meilin Wu
(Xi'an University of Technology)
Hui Liu
(Xi'an University of Technology)
Zhiyuan Chen
(Xi'an University of Technology)
Collaboration:
Department of Physics, Xi'an University of Technology, Shaanxi 710048, China
The Key Laboratory of Ultrafast Photoelectric Technology and Terahertz Science in Shaanxi, Xi'an
The paper proposes a new streamer model to explain current filament phenomenon. The model includes three aspects: the streamer generation, the streamer development and the streamer flowing through PCSS. There are two conditions for streamer formation: one is the carrier density which should be not less than 1017cm-3, and another is the electric field which should be much higher than 250 kV/cm. Avalanche ionization and compound radiation are the physical factors of the streamer development. When the current filament flows through PCSS, Lock-on effect is caused by dynamic distribution of transient voltages of PCSS and the load. On a micro level, Lock-on effect is caused by dynamic change of production rate and recombination rate of carries. Based on this streamer mode, the current filament velocity is calculated as about 2×108cm/s. Then the current filament phenomenon is explained by Franz-Keldysh effect.
* National Key Research and Development Program of China, Grant No. 2017YFA0701005National Natural Science Foundation of China,Grant No. 61427814
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