Diagnostic principles of four-wave mixing for plasmas

Journal Article · Tue Nov 01 00:00:00 EST 1994 · Optical Engineering; (United States)

DOI:https://doi.org/10.1117/12.183386· OSTI ID:6850236

Meng, Y; Li, J; Luo, J ^[1]

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1. Academia Sinica, Hefei (China). Inst. of Plasma Physics

A new method is used to diagnose plasma density space-profiles that involves phase conjugate reflection of four-wave mixing. Theoretical calculations for plasma parameters in the HT-6M tokamak show that two pump-wave beams (HCN laser), with a power of 1 W together with a signal beam (D[sub 2]O or CH[sub 3]F laser) of 0.1 W, can create a reflection of 0.1 to 0.43 mW with a phase conjugate to the signal where the cross section of all external beams is 1 cm. This means that the reflective ratio of four-wave mixing is two orders larger than the ratio of laser superheating scatter. The lower power laser, therefore, can be used to diagnose plasmas.

• OSTI ID: 6850236
• Journal Information: Optical Engineering; (United States), Vol. 33:11; ISSN 0091-3286
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
HT-6M TOKAMAK
PLASMA DENSITY
PLASMA DIAGNOSTICS
FREQUENCY MIXING
LASER RADIATION
THEORETICAL DATA
CLOSED PLASMA DEVICES
DATA
ELECTROMAGNETIC RADIATION
INFORMATION
NUMERICAL DATA
RADIATIONS
THERMONUCLEAR DEVICES
TOKAMAK DEVICES
700320* - Plasma Diagnostic Techniques & Instrumentation- (1992-)