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Related Experiment Video

Updated: Jul 15, 2026

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics

Published on: January 19, 2018

Mega-ampere submicrosecond generator GIT-32.

B M Kovalchuk¹, A V Kharlov, V N Kiselev

¹Institute of High Current Electronics, 2/3 Academichesky Avenue, 634055 Tomsk, Russia.

The Review of Scientific Instruments

|April 7, 2007

Summary

The GIT-32 is a robust pulsed plasma current generator storing 18 kJ. It delivers up to 1.34 MA with a 530 ns rise time, ideal for low-impedance loads like Z pinches.

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Area of Science:

Plasma Physics
Pulsed Power Systems

Background:

Pulsed plasma experiments require high-current generators.
Existing generators may have limitations in performance, complexity, or cost.

Purpose of the Study:

To develop and characterize the GIT-32 current generator for pulsed plasma applications.
To assess its performance with various inductive loads and charging voltages.

Main Methods:

The GIT-32 generator utilizes a parallel capacitor bank (32 x 0.17 µF) and multichannel spark switches.
It was tested with inductive loads of 10, 15, and 20 nH at charging voltages from 40-80 kV.
Key parameters like current amplitude, rise time, and jitter were measured.

Main Results:

At 80 kV and a 10 nH load, the generator achieved 1 MA current with a 490 ns rise time (with damping resistors) or 1.34 MA with a 530 ns rise time (without resistors).
The generator exhibits a low net inductance of 12 nH and self-impedance of approximately 0.05 Ω.
Reliable operation was observed between 40-80 kV with minimal jitter (≤7 ns at 40 kV).

Conclusions:

The GIT-32 is a simple, robust, and cost-effective apparatus for pulsed plasma experiments.
Its low inductance and self-impedance enable efficient energy transfer to low-impedance loads.
The generator's ease of operation and maintenance make it suitable for various research settings.