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Modeling and tests of nested transmission lines for current adding on a four-stage linear transformer driver
Xu He1, Xiaofeng Jiang1, Fengju Sun2
1State Key Laboratory of Electrical Insulation and Power Equipment, Xi'an Jiaotong University, Xi'an 710049, China.
The Review of Scientific Instruments
|September 1, 2022
Summary
Nested transmission lines enable compact, modular pulsed-power generators. This study demonstrates a four-stage gas-insulated linear transformer driver (LTD) module achieving 1.2 MA current, validating nested lines for MA-class LTD applications.
Area of Science:
- Pulsed Power Engineering
- High Energy Density Physics
Background:
- Linear Transformer Driver (LTD) technology offers compact and modular pulsed-power generators.
- Reducing the physical footprint of MA-class pulsed-power generators is crucial for enhanced portability and application.
Purpose of the Study:
- To design and test nested transmission lines for current adding in a four-stage gas-insulated LTD module.
- To validate the feasibility of nested transmission lines for achieving high current outputs in MA-class LTD systems.
Main Methods:
- Utilized nested transmission lines within a four-stage gas-insulated LTD module for current aggregation.
- Employed numerical simulations to determine the inductance of the nested transmission line geometry.
- Conducted experimental testing of the LTD prototype with a short circuit load.
Main Results:
- Numerical simulations indicated a total system inductance of approximately 10 nH for the nested geometry.
- Experimental results demonstrated that the four-stage LTD module can deliver a 1.2 MA current peak.
- The current pulse exhibited a rise time of 140 ns under a charging voltage of ±50 kV.
Conclusions:
- The use of nested transmission lines is effective for current adding in MA-class LTD modules.
- The developed LTD module design successfully achieved high current output, confirming the applicability of the nested line approach.
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