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A compact pulsed power driver with precisely shaped current waveforms for magnetically driven loading experiments.

Xuemiao Chen1, Binqiang Luo1, Xuping Zhang1

  • 1Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621999, China.

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Summary
This summary is machine-generated.

A new compact high current pulsed power driver, CQ-7, was developed for material dynamics research. It successfully accelerates flyer plates over 7.5 km/s and liners over 9.5 km/s for high-pressure physics experiments.

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Area of Science:

  • Pulsed Power Science and Technology
  • High-Energy-Density Physics
  • Materials Science under Extreme Conditions

Background:

  • Magnetically driven loading techniques are crucial for studying material dynamic behaviors and high-pressure physics.
  • Existing pulsed power drivers require advancements in precision and compactness for advanced experiments.

Purpose of the Study:

  • To develop and establish a compact high current pulsed power driver, CQ-7, for precisely shaped current waveforms.
  • To demonstrate the driver's capability in magnetically driven loading experiments for material dynamics research.

Main Methods:

  • Designed CQ-7 using a Marx generator energy storage and low impedance coaxial cable transmission.
  • Incorporated 256 two-stage Marx generators, individually triggered for sequential current shaping.
  • Tested performance using magnetically driven flyer plates and solid liner implosion experiments.

Main Results:

  • CQ-7 delivers peak currents from 5 to 7 MA with a 400-700 ns rising time.
  • Accelerated an aluminum flyer plate (12 × 8 × 1 mm³) to over 7.5 km/s.
  • Uniformly drove an aluminum liner (6.2 mm inner diameter, 0.4 mm thickness) to over 9.5 km/s.

Conclusions:

  • CQ-7 is a robust and compact pulsed power platform for material dynamics and high-pressure physics.
  • The driver enables precise control over current waveforms for advanced experimental applications.