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A compact high power pulsed modulator based on spiral Blumlein line
1Department of Electrical Engineering, Tsinghua University, Beijing, 100084, China. ljle333@yahoo.com.cn
The Review of Scientific Instruments
|November 6, 2007
Summary
A compact pulsed modulator using a spiral water Blumlein line achieves high power output. This reliable accelerator generates over 500 kV diode voltage and 32 kA electron beam current with a 180 ns pulse duration.
Area of Science:
- High-power pulsed systems
- Pulsed power technology
- Plasma physics
Background:
- Pulsed power modulators are essential for various scientific and industrial applications.
- Developing compact and reliable high-power pulsed modulators remains a significant engineering challenge.
Purpose of the Study:
- To describe a novel compact high-power pulsed modulator.
- To present experimental and simulation results of its performance.
Main Methods:
- Construction of a modulator utilizing a spiral water Blumlein line, primary storage capacitors, a Tesla transformer, and a field-emission diode.
- Electrical field distribution simulations within the spiral water Blumlein line.
- PSPICE simulations for charging dynamics, including voltage and current waveforms.
Main Results:
- Experimental validation of diode voltage exceeding 500 kV.
- Achieved electron beam current of approximately 32 kA.
- Pulse duration measured at around 180 ns.
- Simulations confirmed theoretical predictions and experimental data.
Conclusions:
- The spiral water Blumlein line modulator is a compact, stable, and reliable high-power pulsed accelerator.
- The design demonstrates effective performance for high-voltage, high-current pulsed applications.
