TITLE

CO2 laser scintillation interferometer for the measurement of density fluctuations in plasma confinement devices

AUTHOR(S)
Nazikian, R.; Sharp, L. E.
PUB. DATE
November 1987
SOURCE
Review of Scientific Instruments;Nov87, Vol. 58 Issue 11, p2086
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Density fluctuations in magnetically confined plasmas have been measured from the phase scintillations impressed onto a 10.6-μm wavelength laser beam probe, using a Mach–Zender interferometer operating in the optical near field. By careful design, the effects of vibration and air-borne sound waves, which limit the instrument’s sensitivity, have been reduced to a level such that the minimum detectable signal is 10-6 rad in the frequency range 10 kHz–1 MHz, corresponding to a plasma density fluctuation level (δN/N) of 10-4.
ACCESSION #
9785997

 

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