Plasma magnetic-field measurement by intracavity absorption. Progress report, June 1, 1982-May 31, 1983
Dye laser intracavity absorption (ICA) is being studied as a potential diagnostic on plasma or neutral beam systems. For magnetic field measurements it is necessary to make Zeeman effect observations on the resonance transition of atomic lithium in a time of about 10/sup -4/ second. To do this requires the dye laser to be swept in wavelength as rapidly as possible, and to date ICA has been observed at sweep rates up to 30 KHZ. These results are presented in this report. ICA has also been observed in a laser system consisting of an oscillator optical cavity loosely coupled to a second optical cavity containing the absorber. The signals observed with this arrangement seem to be only about a factor of two weaker than those observed in a single cavity. Preliminary experiments directed toward the detection of refractory metal impurities have been carried out, and absorption by atomic tantalum contained in an atomic beam has been observed. This points the way to the detection of other refractory metals contained as impurities in a plasma or neutral beam.
- Research Organization:
- State Univ. of New York, Buffalo (USA)
- DOE Contract Number:
- AC02-81ER53122
- OSTI ID:
- 5881873
- Report Number(s):
- DOE/ER/53122-1; ON: DE83014720; TRN: 83-019417
- Country of Publication:
- United States
- Language:
- English
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