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Title: Development of polarization-controlled multi-pass Thomson scattering system in the GAMMA 10 tandem mirror

Abstract

In the GAMMA 10 tandem mirror, the typical electron density is comparable to that of the peripheral plasma of torus-type fusion devices. Therefore, an effective method to increase Thomson scattering (TS) signals is required in order to improve signal quality. In GAMMA 10, the yttrium-aluminum-garnet (YAG)-TS system comprises a laser, incident optics, light collection optics, signal detection electronics, and a data recording system. We have been developing a multi-pass TS method for a polarization-based system based on the GAMMA 10 YAG TS. To evaluate the effectiveness of the polarization-based configuration, the multi-pass system was installed in the GAMMA 10 YAG-TS system, which is capable of double-pass scattering. We carried out a Rayleigh scattering experiment and applied this double-pass scattering system to the GAMMA 10 plasma. The integrated scattering signal was made about twice as large by the double-pass system.

Authors:
; ; ; ; ; ;  [1]; ; ; ;  [2];  [3]
  1. Plasma Research Center, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577 (Japan)
  2. National Institute for Fusion Science, 322-6 Oroshi-cho, Toki, Gifu 509-5292 (Japan)
  3. Institute of Advanced Energy, Kyoto University, Gokasho, Uji, Kyoto 611-0011 (Japan)
Publication Date:
OSTI Identifier:
22093936
Resource Type:
Journal Article
Journal Name:
Review of Scientific Instruments
Additional Journal Information:
Journal Volume: 83; Journal Issue: 10; Other Information: (c) 2012 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0034-6748
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; CONFIGURATION; DETECTION; ELECTRON DENSITY; GAMMA 10 DEVICES; NEODYMIUM LASERS; PLASMA; PLASMA DENSITY; PLASMA DIAGNOSTICS; POLARIZATION; RAYLEIGH SCATTERING; RECORDING SYSTEMS; THOMSON SCATTERING; YTTRIUM COMPOUNDS

Citation Formats

Yoshikawa, M., Morimoto, M., Shima, Y., Kohagura, J., Sakamoto, M., Nakashima, Y., Imai, T., Yasuhara, R., Yamada, I., Kawahata, K., Funaba, H., and Minami, T. Development of polarization-controlled multi-pass Thomson scattering system in the GAMMA 10 tandem mirror. United States: N. p., 2012. Web. doi:10.1063/1.4734490.
Yoshikawa, M., Morimoto, M., Shima, Y., Kohagura, J., Sakamoto, M., Nakashima, Y., Imai, T., Yasuhara, R., Yamada, I., Kawahata, K., Funaba, H., & Minami, T. Development of polarization-controlled multi-pass Thomson scattering system in the GAMMA 10 tandem mirror. United States. https://doi.org/10.1063/1.4734490
Yoshikawa, M., Morimoto, M., Shima, Y., Kohagura, J., Sakamoto, M., Nakashima, Y., Imai, T., Yasuhara, R., Yamada, I., Kawahata, K., Funaba, H., and Minami, T. 2012. "Development of polarization-controlled multi-pass Thomson scattering system in the GAMMA 10 tandem mirror". United States. https://doi.org/10.1063/1.4734490.
@article{osti_22093936,
title = {Development of polarization-controlled multi-pass Thomson scattering system in the GAMMA 10 tandem mirror},
author = {Yoshikawa, M. and Morimoto, M. and Shima, Y. and Kohagura, J. and Sakamoto, M. and Nakashima, Y. and Imai, T. and Yasuhara, R. and Yamada, I. and Kawahata, K. and Funaba, H. and Minami, T.},
abstractNote = {In the GAMMA 10 tandem mirror, the typical electron density is comparable to that of the peripheral plasma of torus-type fusion devices. Therefore, an effective method to increase Thomson scattering (TS) signals is required in order to improve signal quality. In GAMMA 10, the yttrium-aluminum-garnet (YAG)-TS system comprises a laser, incident optics, light collection optics, signal detection electronics, and a data recording system. We have been developing a multi-pass TS method for a polarization-based system based on the GAMMA 10 YAG TS. To evaluate the effectiveness of the polarization-based configuration, the multi-pass system was installed in the GAMMA 10 YAG-TS system, which is capable of double-pass scattering. We carried out a Rayleigh scattering experiment and applied this double-pass scattering system to the GAMMA 10 plasma. The integrated scattering signal was made about twice as large by the double-pass system.},
doi = {10.1063/1.4734490},
url = {https://www.osti.gov/biblio/22093936}, journal = {Review of Scientific Instruments},
issn = {0034-6748},
number = 10,
volume = 83,
place = {United States},
year = {Mon Oct 15 00:00:00 EDT 2012},
month = {Mon Oct 15 00:00:00 EDT 2012}
}