First results from the phase contrast imaging system on TEXT-U

Journal Article · Wed Jan 01 04:00:00 EST 1997 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.1147717· OSTI ID:451832

Chatterjee, R; Hallock, G A ^[1]

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1. The University of Texas at Austin, Austin, Texas 78712 (United States)

A phase contrast imaging (PCI) diagnostic with a vertical beam covering the central third of the plasma was successfully operated to study density fluctuations in the TEXT-U tokamak. The diagnostic had a wave number range of 0.5{endash}12 cm{sup {minus}1}, a bandwidth of 500 kHz and a sensitivity of about 10{sup 10} cm{sup {minus}3}. We present the optical design of the system and discuss three calibration techniques. We compare density fluctuation spectra obtained with spectra from Langmuir probes at the edge and the heavy ion beam probe diagnostic in the core of the plasma. This provides evidence that the PCI diagnostic is sensitive to both edge and core turbulence. {copyright} {ital 1997 American Institute of Physics.}

• DOE Contract Number: FG03-94ER54241
• OSTI ID: 451832
• Report Number(s): CONF-960543--
• Journal Information: Review of Scientific Instruments, Journal Name: Review of Scientific Instruments Journal Issue: 1 Vol. 68; ISSN 0034-6748; ISSN RSINAK
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CALIBRATION
FLUCTUATIONS
IMAGE PROCESSING
IMAGES
ION BEAMS
Langmuir probes
PLASMA DENSITY
PLASMA DIAGNOSTICS
PROBES
TEXT DEVICES
plasma boundary layers
plasma fluctuations
plasma toroidal confinement
plasma turbulence