Accession Number:

ADA017640

Title:

Kinetic Reaction Coefficients in Rocket Exhaust Plumes.

Descriptive Note:

Interim rept. 1 Mar 74-31 Jun 75,

Corporate Author:

MISSOURI UNIV ROLLA DEPT OF PHYSICS

Personal Author(s):

• Snow,William R.
• Schearer,Laird D.
• Nygaard,Kaare J.
• Corbin,R. J.

Report Date:

1975-08-01

Pagination or Media Count:

34.0

Abstract:

During the first year of the program, the cross section photoionization of excited potassium atoms has been measured from threshold to 2500A. A drift tube apparatus with a quadrupole mass spectrometer for ion identification has been constructed to study dissociative attachment of HCl. The primary ion, C1-, has been found to form molecular negative ions identified as HClCl-,HCl2Cl-, and the impurity ion H2O,Cl-. For drift tube conditions near the threshold for dissociative attachment for HCl, the molecular negative ions are most abundant at higher drift tube energies, the atomic negative ion dominates. A xenon-ion laser has been constructed and its power level optimized so that a frequency doubling crystal can be used to make a useful source of ionization for future recombination measurements. Cross sections for the formation of Cl from Cl2 and HCl by electron impact have been measured from threshold to 100eV.

Descriptors:

• *Hydrogen chloride
• *Chlorine
• *Potassium
• *Ions
• *Rocket exhaust
• Photoionization
• Mass spectra
• Laboratory equipment
• Drift
• Chemical analysis
• Dissociation
• Plumes
• Reactivities
• Excitation
• Reaction kinetics

Subject Categories:

• Atomic and Molecular Physics and Spectroscopy
• Combustion and Ignition

Distribution Statement:

APPROVED FOR PUBLIC RELEASE