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 journalArticlepeer-review

15 Citations (Scopus)


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
Issue number6
Early online date21 Jun 2011
Publication statusPublished - 2011


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


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