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Record 5 of 481
Line Profile Measurements of Atomic Oxygen at 1300 A with a VUV Raman Shifter
Author and Affiliation:
Sharma, Surendra P.(NASA Ames Research Center, Moffett Field, CA United States)
Exberger, Richard J.(NASA Ames Research Center, Moffett Field, CA United States)
Meyer, Scott A.(Stanford Univ., Stanford, CA United States)
Gilmore, John O.(Stanford Univ., Stanford, CA United States)
Abstract: We are currently developing an atomic oxygen diagnostic to study the degree of oxygen dissociation in ground-based facilities. The absorption of the (sub 3)P - (sup 3)S(sup 0) resonance triplet in the vacuum ultraviolet is a direct measure of the ground state number density of atomic oxygen. Although the integrated line strength is well known for these transitions, the line profile is not. We report the results of a series of experiments in which the line profile is measured in shock-heated oxygen. An ArF excimer laser and a hydrogen Raman shifter generate tunable VUV radiation at the resonance wavelength. The test gas is dissociated oxygen, generated in the Electric Arc Shock Tube (EAST) Facility at NASA-Ames Research Center. By measuring the absorption of known concentrations of atomic oxygen, we are able to study the absorption line profile. The results will serve as a calibration to apply this diagnostic in other flowfields.
Publication Date: May 05, 1994
Document ID:
20010114273
(Acquired Dec 07, 2001)
Subject Category: ATOMIC AND MOLECULAR PHYSICS
Document Type: Preprint
Meeting Information: Aerospace Science; 33rd; 10-15 Jan. 1995; Reno, NV; United States
Contract/Grant/Task Num: RTOP 232-01-04
Financial Sponsor: NASA Ames Research Center; Moffett Field, CA United States
Organization Source: NASA Ames Research Center; Moffett Field, CA United States
Description: 1p; In English
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: No Copyright
NASA Terms: ATOMIC ENERGY LEVELS; OXYGEN ATOMS; PROCEDURES; GAS DISSOCIATION; LINE SPECTRA; CALIBRATING; ELECTRIC ARCS; FAR ULTRAVIOLET RADIATION; FLOW DISTRIBUTION; GROUND STATE; HYDROGEN; RARE GAS-HALIDE LASERS; SHOCK HEATING; SHOCK TUBES
Availability Source: Other Sources
Availability Notes: Abstract Only
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