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Title: Design of tangential viewing phase contrast imaging for turbulence measurements in JT-60SA

Abstract

A tangential viewing phase contrast imaging system is being designed for the JT-60SA tokamak to investigate microturbulence. In order to obtain localized information on the turbulence, a spatial-filtering technique is applied, based on magnetic shearing. The tangential viewing geometry enhances the radial localization. The probing laser beam is injected tangentially and traverses the entire plasma region including both low and high field sides. The spatial resolution for an Internal Transport Barrier discharge is estimated at 30%–70% of the minor radius at k = 5 cm{sup −1}, which is the typical expected wave number of ion scale turbulence such as ion temperature gradient/trapped electron mode.

Authors:
 [1];  [2];  [3]; ; ; ; ; ;  [4]
  1. National Institute for Fusion Science, Toki, Gifu 509-5292 (Japan)
  2. (Japan)
  3. EPFL–SPC, Lausanne (Switzerland)
  4. National Institutes for Quantum and Radiological Science and Technology, Naka, Ibaraki 311-0193 (Japan)
Publication Date:
OSTI Identifier:
22596499
Resource Type:
Journal Article
Resource Relation:
Journal Name: Review of Scientific Instruments; Journal Volume: 87; Journal Issue: 11; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; 70 PLASMA PHYSICS AND FUSION TECHNOLOGY; BEAMS; FILTERS; GEOMETRY; IMAGES; ION TEMPERATURE; LASERS; PLASMA; PROBES; SPATIAL RESOLUTION; TEMPERATURE GRADIENTS; TOKAMAK DEVICES; TRAPPED ELECTRONS; TURBULENCE

Citation Formats

Tanaka, K., E-mail: ktanaka@nifs.ac.jp, Department of Advanced Energy Engineering, Kyushu University, Kasuga, Fukuoka 816-8580, Coda, S., Yoshida, M., Sasao, H., Kawano, Y., Imazawa, R., Kubo, H., and Kamada, Y.. Design of tangential viewing phase contrast imaging for turbulence measurements in JT-60SA. United States: N. p., 2016. Web. doi:10.1063/1.4960057.
Tanaka, K., E-mail: ktanaka@nifs.ac.jp, Department of Advanced Energy Engineering, Kyushu University, Kasuga, Fukuoka 816-8580, Coda, S., Yoshida, M., Sasao, H., Kawano, Y., Imazawa, R., Kubo, H., & Kamada, Y.. Design of tangential viewing phase contrast imaging for turbulence measurements in JT-60SA. United States. doi:10.1063/1.4960057.
Tanaka, K., E-mail: ktanaka@nifs.ac.jp, Department of Advanced Energy Engineering, Kyushu University, Kasuga, Fukuoka 816-8580, Coda, S., Yoshida, M., Sasao, H., Kawano, Y., Imazawa, R., Kubo, H., and Kamada, Y.. Tue . "Design of tangential viewing phase contrast imaging for turbulence measurements in JT-60SA". United States. doi:10.1063/1.4960057.
@article{osti_22596499,
title = {Design of tangential viewing phase contrast imaging for turbulence measurements in JT-60SA},
author = {Tanaka, K., E-mail: ktanaka@nifs.ac.jp and Department of Advanced Energy Engineering, Kyushu University, Kasuga, Fukuoka 816-8580 and Coda, S. and Yoshida, M. and Sasao, H. and Kawano, Y. and Imazawa, R. and Kubo, H. and Kamada, Y.},
abstractNote = {A tangential viewing phase contrast imaging system is being designed for the JT-60SA tokamak to investigate microturbulence. In order to obtain localized information on the turbulence, a spatial-filtering technique is applied, based on magnetic shearing. The tangential viewing geometry enhances the radial localization. The probing laser beam is injected tangentially and traverses the entire plasma region including both low and high field sides. The spatial resolution for an Internal Transport Barrier discharge is estimated at 30%–70% of the minor radius at k = 5 cm{sup −1}, which is the typical expected wave number of ion scale turbulence such as ion temperature gradient/trapped electron mode.},
doi = {10.1063/1.4960057},
journal = {Review of Scientific Instruments},
number = 11,
volume = 87,
place = {United States},
year = {Tue Nov 15 00:00:00 EST 2016},
month = {Tue Nov 15 00:00:00 EST 2016}
}