A CO sub 2 laser tangential imaging system for CDX-U (abstract)

Journal Article · Thu Oct 01 04:00:00 EDT 1992 · Review of Scientific Instruments; (United States)

DOI:https://doi.org/10.1063/1.1143520· OSTI ID:7153646

Nazikian, R M; Robinson, J; Wright, J; Kaita, R ^[1]

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1. Plasma Physics Laboratory, Princeton University, Princeton, New Jersey 08543 (United States)

In a previous paper (R. Nazikian and B. Grek, Rev. Sci. Instrum. {bold 61}, 2899 (1990)), it was shown that tangential imaging provides a powerful new technique for rendering two-dimensional images of local density fluctuations in toroidal plasma devices. The technique consists of projecting a CO{sub 2} laser beam tangent to magnetic field lines at the plasma midplane and using phase contrast or other related optical methods for imaging line integral density fluctuations. In this paper we present recent progress in the development of such an imaging system for CDX-U. The interferometer makes use of a novel variation on the Zernike phase contrast method for detecting phase variations impressed on laser beams propagating through random media. This work supported by Department of Energy contract No. DE-AC02-76-CHO-3073.

• DOE Contract Number: AC02-76CH03073
• OSTI ID: 7153646
• Journal Information: Review of Scientific Instruments; (United States), Journal Name: Review of Scientific Instruments; (United States) Vol. 63:10; ISSN RSINA; ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700320* -- Plasma Diagnostic Techniques & Instrumentation-- (1992-)
CARBON DIOXIDE LASERS
FLUCTUATIONS
GAS LASERS
INTERFEROMETERS
LASERS
MEASURING INSTRUMENTS
PLASMA DIAGNOSTICS
THERMONUCLEAR DEVICES
VARIATIONS