Lithium beam Zeeman spectroscopy diagnostic development
A local magnetic field diagnostic, based on the Zeeman splitting of lithium atoms is under development at Los Alamos. A modified duoPIGatron ion source is used in conjunction with an 80-kV accelerator to produce a high-density atomic lithium beam, permitting access to plasmas with a wide range of parameters. Detection of the Zeeman pattern in the plasma will be enhanced by the use of a dye laser, either using fluorescence or intracavity absorption (ICA). While the sensitivity of resonance fluorescence is well known, that of ICA is less well understood where short time scales are involved. Experiments to study the time/concentration trade-offs in ICA have been performed on lithium vapor, and show that the sensitivity of ICA is at least equal to that of fluorescence (assuming a dark background), under conditions of submillisecond detection times. ICA is also 10/sup 3/ times more sensitive than single-pass absorption under these conditions. Optimization of the atomic beam and integration with the dye laser systems are in progress.
- Research Organization:
- Los Alamos National Lab., NM
- OSTI ID:
- 5138924
- Report Number(s):
- CONF-840922-; TRN: 86-031906
- Journal Information:
- Rev. Sci. Instrum.; (United States), Vol. 56:5; Conference: 5. APS topical conference on high temperature plasma diagnostics, Tahoe City, CA, USA, 16 Sep 1984
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
PLASMA DIAGNOSTICS
X-RAY SPECTROSCOPY
ATOMIC BEAMS
DESIGN
DYE LASERS
FLUORESCENCE
PERFORMANCE
ZEEMAN EFFECT
BEAMS
LASERS
LIQUID LASERS
LUMINESCENCE
SPECTROSCOPY
700102* - Fusion Energy- Plasma Research- Diagnostics
440101 - Radiation Instrumentation- General Detectors or Monitors & Radiometric Instruments