A New Approach to Generating Negative Ion Beams.

Abstract

The report describes measurements of ion-pair production cross sections for He*(2(1,3)S)-Li, Li-Cs, Li-Na, and Li-Na*(3p) collisions at energies of several keV. Measurements of chemi-ionization cross sections for He*(2(1,3)S)-Li collisions are also mentioned. A method is described for exciting a fraction of the atoms in a Li vapor to the 2p resonance state using a dye laser. The fraction is determined by observing with the laser on and off the ion-pair production of Cl- when a fast Cl beam collides with the vapor. Keywords: Ion pair production, Ionization, Cross sections, Molecular beams, Reaction rates.

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Document Details

Document Type
Technical Report
Publication Date
Nov 02, 1987
Accession Number
ADA191119

Entities

People

  • Roy H. Neynaber
  • Sheng Y. Tang

Organizations

  • University of California, San Diego

Tags

Communities of Interest

  • Energy and Power Technologies
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Air Force
  • Atoms
  • Charge Transfer
  • Classification
  • Collisions
  • Dye Lasers
  • Energy
  • Excitation
  • Ground State
  • Ion Beams
  • Ionization
  • Lasers
  • Liquid Dye Lasers
  • Measurement
  • Pair Production
  • Resonance
  • Security

Fields of Study

  • Physics

Readers

  • Molecular Photonics/Laser Physics
  • Pulsed Power and Plasma Physics.

Technology Areas

  • Directed Energy
  • Directed Energy - Lasers