CO2 laser scintillation interferometer for the measurement of density fluctuations in plasma confinement devices
1987; American Institute of Physics; Volume: 58; Issue: 11 Linguagem: Inglês
10.1063/1.1139468
ISSN1527-2400
Autores Tópico(s)Cold Atom Physics and Bose-Einstein Condensates
ResumoDensity 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.
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