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Parallel plate capacitors consist of two conducting plates separated by a certain distance. However, it is mechanically difficult to hold the large plates parallel to each other without actual contact. Hence, a dielectric layer is commonly placed between the plates, which provides an easy solution for holding the plates together with a small gap and increases the capacitance of the capacitor.
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Low jitter, low inductance solid dielectric switches.

A H Guenther1, D M Strickland, J R Bettis

  • 1Air Force Weapons Laboratory, Kirtland Air Force Base, Albuquerque, New Mexico 87417, USA.

The Review of Scientific Instruments
|November 1, 1979
PubMed
Summary
This summary is machine-generated.

Graded solid dielectric sandwiches in laser-triggered spark gaps (LTS) enable multichannel operation. This method maintains LTS performance while achieving up to ten breakdown channels with reduced rise time.

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Area of Science:

  • Electrical Engineering
  • Plasma Physics
  • Materials Science

Background:

  • Laser-triggered spark gaps (LTS) are crucial for high-voltage switching applications.
  • Achieving stable multichannel breakdown in LTS is challenging but desirable for improved performance.
  • Existing LTS designs often face limitations in managing breakdown channel formation.

Purpose of the Study:

  • To investigate the efficacy of graded solid dielectric sandwiches in LTS.
  • To explore the impact of dielectric structures on multichannel operation.
  • To assess the influence on LTS performance metrics like delay, jitter, and rise time.

Main Methods:

  • Utilizing sandwich structures composed of Mylar dielectric sheets.
  • Incorporating small circular or hexagonal aluminum inserts between dielectric layers.
  • Applying electrical stress at 4.1 kV/mil to the dielectric sandwiches.
  • Observing and analyzing breakdown channel formation using laser triggering.

Main Results:

  • Successfully induced highly desirable multichannel operations in LTS.
  • Observed up to ten distinct breakdown channels within the dielectric sandwiches.
  • Maintained the characteristic low delay and jitter performance of LTS.
  • Noted a significant reduction in the rise time of these multichannel switching events.

Conclusions:

  • Graded solid dielectric sandwiches are effective in promoting stable multichannel breakdown in LTS.
  • This approach enhances switching capabilities without compromising essential LTS performance.
  • The findings suggest a promising pathway for advanced high-voltage switching device design.