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The High Voltage Nanosecond Electric
Pulse Generator Based on a
Photoconductive Semiconductor Switch
Xiaoming Zheng, PhD.
School of Dentistry and Health Sciences
PEITS 2009 Conference
Shenzhen China.
The Authors of This Paper
Minghe Wu1,2, Xiaoming Zheng2, Chengli Ruan1,Hongchun
Yang1,Yunqing Sun1,Shan Wang1, Gang Zeng1 , Hong
Liu3
1. School of Physical Electronics, University of Electronics
Science and Technology of China (UESTC), 610054,
Chengdu, China.
2. School of Dentistry and Health Sciences, Charles Sturt
University, Wagga Wagga, NSW 2678, Australia.
3. School of Information Technology and Physics, Chengdu
University, Chengdu, Sichuan 610068, China.
The Electric Pulse Generator
The New Design
The Integrated Module
Optical Trigger Pulse from
1.064 μm YAG Laser
Fibre Optical Cable
PCM
3mm thickness Substrate
material
Charging Line Conductor
PCSS
Microstrip Ground Conductor
BTL Conductor
Load
The Pulse Outputs
Improvements of the New
Generator
• Higher power conversion rates (66.3% vs 40%)
• Higher input electric field on the PCSS and
output voltages (input 26.7kV/cm vs 9kV/cm).
• Longer life time (dozens shots vs millions shots).
• Lighter in weight and smaller in volume (1.5kg
vs 100kg; 15x8x5cm3 vs 60x50x30cm3)
Operational Mechanism of the
Photoconductive Semiconductor
Switch
• Possible operational
modes: linear, luck-on
and avalanche.
• The Shockley-ReadHall linear model.
Simulation Results
Voltage output
0
-1000
Voltage
-2000
-3000
-4000
-5000
-6000
0
2000
4000
6000
ps
8000
10000
12000
Conclusions
• Significant improvements of the new electric
pulse generator by employing a pulsed power
supply and a Blumlein-like transmission line.
These include higher power conversion rates
and long life time of the PCSS.
• The PCSS is operated in a linear model under
higher than critical input electric field.