Application of advanced millimeter/far-infrared sources to collective Thomson scattering plasma diagnostics

Journal Article · Sat Jan 01 00:00:00 EST 1983 · Int. J. Infrared Millimeter Waves; (United States)

DOI:https://doi.org/10.1007/BF01008603· OSTI ID:6748801

Woskoboinikow, P; Cohn, D R; Temkin, R J

The application of advanced millimeter/far infrared sources to substantially improve the effectiveness of collective Thomson scattering plasma diagnostics is discussed. Gyrotrons, CO/sub 2/ lasers and far infrared lasers which are optically pumped with CO/sub 2/ laser radiation can now provide important new capabilities in terms of combined high peak power and high average power, fine frequency tunability and a wide range of operating frequencies. Their capabilities can improve the signal to noise ratio and make possible time dependent scattering measurements. Both thermal level scattering used for determination of ion temperature and low level non-thermal measurements used for the investigation of plasma turbulence and wave phenomena are considered. Rapidly pulsed gyrotrons, CO/sub 2/, and optically pumped lasers can provide a range of combinations of high peak power and high energy during a given time interval. The use of this high peak power - high energy trade off capability to maximize signal to noise ratios is discussed. Dramatic reduction in stray light, using fine frequency source tunability and gas absorption cell technology, is also discussed.

• Research Organization: Massachusetts Institute of Technology, Cambridge
• OSTI ID: 6748801
• Journal Information: Int. J. Infrared Millimeter Waves; (United States), Vol. 4:2
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
PLASMA DIAGNOSTICS
THOMSON SCATTERING
CARBON DIOXIDE LASERS
ENERGY
FAR INFRARED RADIATION
ION TEMPERATURE
LASERS
MICROWAVE AMPLIFIERS
PLASMA WAVES
POWER
SIGNAL-TO-NOISE RATIO
TEMPERATURE DEPENDENCE
AMPLIFIERS
ELECTROMAGNETIC RADIATION
ELECTRONIC EQUIPMENT
EQUIPMENT
GAS LASERS
INELASTIC SCATTERING
INFRARED RADIATION
MICROWAVE EQUIPMENT
RADIATIONS
SCATTERING
700102* - Fusion Energy- Plasma Research- Diagnostics