THE APPLICATION OF CALCULATION OF ION SOURCE SYSTEMS AND ION ENERGY SPREAD TO SOME OF THE PROBLEMS OF ION-MOLECULE INTERACTIONS,

Abstract

Calculations are described which were designed to support an experimental attempt to measure the specific reaction rate for typical ion-molecule reactions as a function of reactant ion energy. The time averaged specific reaction rate k is given by k = Is/(Ip + Is)B(tau) where Ip and Is are the concentrations of the reactant ion and secondary ion respectively, B the concentration of neutral products and tau the total time for reaction. One possible instrument for measuring this energy dependent rate constant is a mass spectrometer. These calculations show that it is possible to obtain a small spread in the kinetic energy of the ions formed and then to measure the energy dependent rate constant. The source residence time for ions in mass spectrometer used is calculated, and the energy spread of the ion beam produced by a 20 nanosecond ionizing pulse was then computed for many conceivable experimental conditions. (Author)

Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1965
Accession Number
AD0626978

Entities

People

  • J. O. Terry
  • K. R. Ryan

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Charged Particles
  • Energy
  • Ion Beams
  • Ion Molecule Interactions
  • Ion Sources
  • Ions
  • Kinetic Energy
  • Mass Spectrometers
  • Molecules
  • Nanosecond Time
  • Spectrometers

Fields of Study

  • Physics

Readers

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