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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Walker, Q.E. Cappelli, M.A. |
| Copyright Year | 1999 |
| Description | Author affiliation: Stanford Univ., CA, USA (Walker, Q.E.) |
| Abstract | Summary form only given. We are interested in measuring the plasma properties of the helium arcjet flowfield. A number of different diagnostic have been developed to investigate the arcjet plasma plume. Among these diagnostics, laser-induced fluorescence (LIF) has proven to be very useful due to it spatial resolution and species specific nature. This paper presents the results of LIF measurements of the velocity and temperature of the arcjet flowfield. From previous studies, the arcjet flowfield is known to have electron number densities in the range of 10/sup -12/ cm/sup 3/ and electron temperatures of 0.2-0.5 eV. In the preliminary study of the helium arcjet, velocities between 9 and 15 km/s were measured 7 cm downstream of the exit plane with temperatures between 300 and 900 K. In this study, the 587.5 nm transition will be used. A dye ring laser using Rhodamine 6G pumped by a 5 W argon-ion laser will be used to probe this transition. By comparing the measured line center position with that of a stationary reference source, the Doppler shift was measured and converted into an axial velocity. The FWHM of the lineshape will be used to determine the translational temperature. |
| File Size | 123319 |
| File Format | |
| ISBN | 0780352246 |
| ISSN | 07309244 |
| DOI | 10.1109/PLASMA.1999.829653 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 1999-06-24 |
| Publisher Place | USA |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Helium Plasma temperature Plasma measurements Velocity measurement Plasma properties Electrons Laser transitions Pump lasers Ring lasers Position measurement |
| Content Type | Text |
| Resource Type | Article |
| Subject | Atomic and Molecular Physics, and Optics Condensed Matter Physics Electrical and Electronic Engineering |
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