Time-resolved imaging of a silicon micro-cavity discharge array

Paul M. Bryant, Gregory C.B. Clarke, Taeklim Kim, Sung Jin Park, J. Gary Eden, James W. Bradley

Research output: Contribution to journalArticlepeer-review


Time-resolved imaging of an array of silicon based micro-cavity discharge devices, operating in helium at 700 Torr, is presented. The array is shown to ignite four times per cycle, with the brightest emission corresponding to a distinct current peak in the negative phase of the applied sinusoidal voltage. The cavities do not ignite simultaneously and the instantaneous intensity across the array is non-uniform. Before the brightest emission peak is reached, optical imaging shows some of the cavities to be ignited. During the emission peak, neighboring cavities are successively ignited, resulting in two emission regions which propagate across the array with wavefront velocities of 3 and 6 km/s.

Original languageEnglish (US)
Pages (from-to)1248-1249
Number of pages2
JournalIEEE Transactions on Plasma Science
Issue number4 PART 1
StatePublished - Aug 2008


  • Arrays
  • Atmospheric pressure glow discharge
  • Cameras
  • Cavity resonators
  • Discharges
  • Helium
  • Imaging
  • Micro-discharge
  • Optical imaging
  • Silicon

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Condensed Matter Physics


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