A high voltage pulsed power supply for capillary discharge waveguide applications

Salima Saleh Abu-Azoum, Mark Wiggins, Riju Issac, Gregor H. Welsh, Gregory Vieux, Mihai Ganciu, Dino Jaroszynski

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

We present an all solid-state, high voltage pulsed power supply for inducing stable plasma formation (density ∼1018 cm−3) in gas-filled capillary discharge waveguides. The pulser (pulse duration of 1 μs) is based on transistor switching and wound transmission line transformer technology. For a capillary of length 40 mm and diameter 265 μm and gas backing pressure of 100 mbar, a fast voltage pulse risetime of 95 ns initiates breakdown at 13 kV along the capillary. A peak current of ∼280 A indicates near complete ionization, and the r.m.s. temporal jitter in the current pulse is only 4 ns. Temporally stable plasma formation is crucial for deploying capillary waveguides as plasma channels in laser-plasma interaction experiments, such as the laser wakefield accelerator.
Original languageEnglish
Article number063505
Number of pages4
JournalReview of Scientific Instruments
Volume82
Issue number6
Early online date21 Jun 2011
DOIs
Publication statusPublished - 2011

Keywords

  • lines
  • wakefield accelerators
  • lasers
  • beams
  • plasma filled waveguides

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