Chemi-ionization in mercury and neon discharges

Valery Sheverev, Lorcan Folan, Vadim Stephaniuk

Research output: Contribution to journalConference articlepeer-review


Modeling of discharge light sources is becoming increasingly important in predicting device performance and determination of optimal regimes for their operation. A good knowledge of the elementary processes occurring under non-equilibrium conditions is a prerequisite for any model. Chemi-ionization processes involving collisions of excited atoms play a crucial role in many lighting discharges, both for low (a few torr) and higher (>10 torr) gas pressures. The understanding of such processes and their role in discharge power balance is scant, and quantitative data on the rate coefficients is inadequate. Experimental studies of chemi-ionization in collisions of metastable neon and mercury atoms were recently initiated at Brooklyn Polytechnic University. Rate coefficients for collisions between two p53s1 3P2 and between 2p53s13P2 and 3P1 excited neon atoms were measured using plasma electron spectroscopy. Investigation of chemi-ionization in collisions of 63P0,1,2 mercury states is under way and the intermediate results will be reported. Results of quantitative evaluation of the importance of the chemi-ionization for neon and mercury lamp modeling will also be presented.

Original languageEnglish (US)
Number of pages1
JournalIEEE International Conference on Plasma Science
StatePublished - 1999
EventThe 26th IEEE International Conference on Plasma Science (ICOPS99) - Monterey, CA, USA
Duration: Jun 20 1999Jun 24 1999

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics
  • Electrical and Electronic Engineering


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