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Title: Development of a supersonic atomic oxygen nozzle beam source for crossed beam scattering experiments

Abstract

A high pressure, supersonic, radio frequency discharge nozzle beam source was developed for the production of intense beams of ground state oxygen atoms. An efficient impedance matching scheme was devised for coupling the radio frequency power to the plasma as a function of both gas pressure and composition. Techniques for localizing the discharge directly behind the orifice of a water-cooled quartz nozzle were also developed. The above combine to yield an atomic oxygen beam source which produces high molecular dissociation in oxygen seeded rare gas mixtures at total pressures up to 200 torr: 80 to 90% dissociation for oxygen/argon mixtures and 60 to 70% for oxygen/helium mixtures. Atomic oxygen intensities are found to be greater than 10/sup 17/ atom sr/sup -1/ sec/sup -1/. A brief discussion of the reaction dynamics of 0 + IC1 ..-->.. I0 + C1 is also presented. 12 references.

Authors:
; ;
Publication Date:
Research Org.:
California Univ., Berkeley (USA). Lawrence Berkeley Lab.
Sponsoring Org.:
US Department of Energy (DOE)
OSTI Identifier:
6546043
Report Number(s):
LBL-7396; CONF-780728-2
TRN: 79-004365
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Conference: 11. symposium on rarefied gas dynamics, Cannes, France, 3 Jul 1978
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; ATOMIC BEAMS; BEAM PRODUCTION; OXYGEN; BEAM CURRENTS; COLLIDING BEAMS; DESIGN; OPERATION; PERFORMANCE; BEAMS; CRYOGENIC FLUIDS; CURRENTS; ELEMENTS; FLUIDS; NONMETALS; 640301* - Atomic, Molecular & Chemical Physics- Beams & their Reactions

Citation Formats

Sibener, S.J., Buss, R.J., and Lee, Y.T. Development of a supersonic atomic oxygen nozzle beam source for crossed beam scattering experiments. United States: N. p., 1978. Web.
Sibener, S.J., Buss, R.J., & Lee, Y.T. Development of a supersonic atomic oxygen nozzle beam source for crossed beam scattering experiments. United States.
Sibener, S.J., Buss, R.J., and Lee, Y.T. Mon . "Development of a supersonic atomic oxygen nozzle beam source for crossed beam scattering experiments". United States. doi:. https://www.osti.gov/servlets/purl/6546043.
@article{osti_6546043,
title = {Development of a supersonic atomic oxygen nozzle beam source for crossed beam scattering experiments},
author = {Sibener, S.J. and Buss, R.J. and Lee, Y.T.},
abstractNote = {A high pressure, supersonic, radio frequency discharge nozzle beam source was developed for the production of intense beams of ground state oxygen atoms. An efficient impedance matching scheme was devised for coupling the radio frequency power to the plasma as a function of both gas pressure and composition. Techniques for localizing the discharge directly behind the orifice of a water-cooled quartz nozzle were also developed. The above combine to yield an atomic oxygen beam source which produces high molecular dissociation in oxygen seeded rare gas mixtures at total pressures up to 200 torr: 80 to 90% dissociation for oxygen/argon mixtures and 60 to 70% for oxygen/helium mixtures. Atomic oxygen intensities are found to be greater than 10/sup 17/ atom sr/sup -1/ sec/sup -1/. A brief discussion of the reaction dynamics of 0 + IC1 ..-->.. I0 + C1 is also presented. 12 references.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Mon May 01 00:00:00 EDT 1978},
month = {Mon May 01 00:00:00 EDT 1978}
}

Conference:
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