Cw dye laser system for Li beam spectroscopy in a tokamak

Conference · Sat Mar 01 04:00:00 EST 1986

OSTI ID:5792202

West, W P; Thomas, D M

The current density profile diagnostic system developed for the TEXT tokamak employs a cw dye laser system to induce fluorescence in a Li beam injected into a tokamak. This laser spectral and polarization modulation requirements not available in commerical systems. The required spectrum is a bandwidth of approximately 5 GHz at a wavelength of 667 nm. The intensity within the bandwidth should be as uniform as possible, i.e., a quasi-continuum within the 5 GHz bandwidth. The polarization of the laser must remain linear, but the plane of polarization must be rotated at a high frequency, 50 kHz. The details of the Li atomic spectrosocpy in a tokamak and the requirements of the diagnostic system that lead to these desired laser parameters will be addressed. The laser system and polarization modulator which have been developed will be discussed in detail, including both design and performance parameters. Possible improvements to enhance performance will also be addressed.

• Research Organization: GA Technologies, Inc., San Diego, CA (USA)
• DOE Contract Number: AC03-84ER53158
• OSTI ID: 5792202
• Report Number(s): GA-A-18415; CONF-860324-24; ON: DE86010217
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700102* -- Fusion Energy-- Plasma Research-- Diagnostics
BEAMS
CHARGED PARTICLES
CLOSED PLASMA DEVICES
CURRENT DENSITY
FLUORESCENCE
ION BEAMS
IONS
LITHIUM IONS
LUMINESCENCE
PERFORMANCE
PLASMA DIAGNOSTICS
POLARIZATION
SPECTROSCOPY
TEXT DEVICES
THERMONUCLEAR DEVICES
TOKAMAK DEVICES