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Excitation and Ionization Rates in Hydrogen at Very High E/n

  • G. N. Hays
  • L. C. Pitchford
  • J. B. Gerardo
  • J. T. Verdeyen
  • Y. M. Li
Conference paper

Abstract

We will report time-dependent electron density and excited state density measurements at very high E/n with a temporal resolution of 1 nsec. We create electron avalanching in gases of interest using a fast-rising (3–6 nsec) microwave (S-band) pu1se, while simultaneously monitoring the electrondensity with a low-power, S-band probe signal. This latter signal is in an interferometer configuration having sufficient sensitivity to monitor densities as low as ≅106 cm–3. The avalanche ionization takes place in a quartz cell contained in the S-band waveguide and having no electrodes or externally applied fields, except for a longitudinally applied magnetic field tuned to electron-cyclotron resonance at the high-power pulse frequency. The equivalent effective field under these conditions reduces to a DC field at one-half the peak value.

Keywords

Temporal Resolution Local Field Quartz Cell Ionization Rate Sandia National Laboratory 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

Copyright information

© Springer-Verlag New York Inc. 1987

Authors and Affiliations

  • G. N. Hays
    • 1
  • L. C. Pitchford
    • 1
    • 2
  • J. B. Gerardo
    • 1
  • J. T. Verdeyen
    • 1
    • 3
  • Y. M. Li
    • 1
    • 2
  1. 1.Sandia National LaboratoriesAlbuquerqueUSA
  2. 2.GTE Laboratories, Inc.WalthamUSA
  3. 3.University of IllinoisChampaignUSA

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