Current profile estimation using Hard X-ray measurement along the top and bottom identical line of sight on TRIAM-1M

Kazuaki Hanada, K. Sasaki, Makoto Hasegawa, Hiroshi Idei, H. Zushi, Kazuo Nakamura, M. Sakamoto, K. N. Sato, S. Kawasaki, H. Nakashima, A. Higashijima

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A new technique to measure the current profile in lower hybrid current drive (LHCD) plasmas by using hard X-ray (HXR) energy spectrum measurement along the top and bottom identical line of sight (ILOS) is proposed. An angle between ILOS and the magnetic filed line is out of alignment from the perpendicular by the poloidal magnetic field. As the emission cross-section of HXR strongly depends on the angle to the drift direction of energetic electrons, that is the magnetic filed line, this disagreement of the angles makes significant difference between the signals of detectors located on the top and bottom. As the result, the poloidal magnetic field is able to be derived from the difference of the HXR emission along the top and bottom ILOS. The method was applied to the full LHCD plasmas on the TRIMA-1M tokamak and the plasma current around the magnetic axis was estimated.

Original languageEnglish
Title of host publication33rd EPS Conference on Plasma Physics 2006, EPS 2006 - Europhysics Conference Abstracts
Pages1608-1611
Number of pages4
Publication statusPublished - Dec 1 2006
Event33rd European Physical Society Conference on Plasma Physics 2006, EPS 2006 - Rome, Italy
Duration: Jun 19 2006Jun 23 2006

Publication series

Name33rd EPS Conference on Plasma Physics 2006, EPS 2006
Volume2

Other

Other33rd European Physical Society Conference on Plasma Physics 2006, EPS 2006
CountryItaly
CityRome
Period6/19/066/23/06

Fingerprint

line of sight
profiles
x rays
plasma currents
magnetic fields
energy spectra
alignment
detectors
cross sections
electrons

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

Cite this

Hanada, K., Sasaki, K., Hasegawa, M., Idei, H., Zushi, H., Nakamura, K., ... Higashijima, A. (2006). Current profile estimation using Hard X-ray measurement along the top and bottom identical line of sight on TRIAM-1M. In 33rd EPS Conference on Plasma Physics 2006, EPS 2006 - Europhysics Conference Abstracts (pp. 1608-1611). (33rd EPS Conference on Plasma Physics 2006, EPS 2006; Vol. 2).

Current profile estimation using Hard X-ray measurement along the top and bottom identical line of sight on TRIAM-1M. / Hanada, Kazuaki; Sasaki, K.; Hasegawa, Makoto; Idei, Hiroshi; Zushi, H.; Nakamura, Kazuo; Sakamoto, M.; Sato, K. N.; Kawasaki, S.; Nakashima, H.; Higashijima, A.

33rd EPS Conference on Plasma Physics 2006, EPS 2006 - Europhysics Conference Abstracts. 2006. p. 1608-1611 (33rd EPS Conference on Plasma Physics 2006, EPS 2006; Vol. 2).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Hanada, K, Sasaki, K, Hasegawa, M, Idei, H, Zushi, H, Nakamura, K, Sakamoto, M, Sato, KN, Kawasaki, S, Nakashima, H & Higashijima, A 2006, Current profile estimation using Hard X-ray measurement along the top and bottom identical line of sight on TRIAM-1M. in 33rd EPS Conference on Plasma Physics 2006, EPS 2006 - Europhysics Conference Abstracts. 33rd EPS Conference on Plasma Physics 2006, EPS 2006, vol. 2, pp. 1608-1611, 33rd European Physical Society Conference on Plasma Physics 2006, EPS 2006, Rome, Italy, 6/19/06.
Hanada K, Sasaki K, Hasegawa M, Idei H, Zushi H, Nakamura K et al. Current profile estimation using Hard X-ray measurement along the top and bottom identical line of sight on TRIAM-1M. In 33rd EPS Conference on Plasma Physics 2006, EPS 2006 - Europhysics Conference Abstracts. 2006. p. 1608-1611. (33rd EPS Conference on Plasma Physics 2006, EPS 2006).
Hanada, Kazuaki ; Sasaki, K. ; Hasegawa, Makoto ; Idei, Hiroshi ; Zushi, H. ; Nakamura, Kazuo ; Sakamoto, M. ; Sato, K. N. ; Kawasaki, S. ; Nakashima, H. ; Higashijima, A. / Current profile estimation using Hard X-ray measurement along the top and bottom identical line of sight on TRIAM-1M. 33rd EPS Conference on Plasma Physics 2006, EPS 2006 - Europhysics Conference Abstracts. 2006. pp. 1608-1611 (33rd EPS Conference on Plasma Physics 2006, EPS 2006).
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abstract = "A new technique to measure the current profile in lower hybrid current drive (LHCD) plasmas by using hard X-ray (HXR) energy spectrum measurement along the top and bottom identical line of sight (ILOS) is proposed. An angle between ILOS and the magnetic filed line is out of alignment from the perpendicular by the poloidal magnetic field. As the emission cross-section of HXR strongly depends on the angle to the drift direction of energetic electrons, that is the magnetic filed line, this disagreement of the angles makes significant difference between the signals of detectors located on the top and bottom. As the result, the poloidal magnetic field is able to be derived from the difference of the HXR emission along the top and bottom ILOS. The method was applied to the full LHCD plasmas on the TRIMA-1M tokamak and the plasma current around the magnetic axis was estimated.",
author = "Kazuaki Hanada and K. Sasaki and Makoto Hasegawa and Hiroshi Idei and H. Zushi and Kazuo Nakamura and M. Sakamoto and Sato, {K. N.} and S. Kawasaki and H. Nakashima and A. Higashijima",
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AU - Sasaki, K.

AU - Hasegawa, Makoto

AU - Idei, Hiroshi

AU - Zushi, H.

AU - Nakamura, Kazuo

AU - Sakamoto, M.

AU - Sato, K. N.

AU - Kawasaki, S.

AU - Nakashima, H.

AU - Higashijima, A.

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N2 - A new technique to measure the current profile in lower hybrid current drive (LHCD) plasmas by using hard X-ray (HXR) energy spectrum measurement along the top and bottom identical line of sight (ILOS) is proposed. An angle between ILOS and the magnetic filed line is out of alignment from the perpendicular by the poloidal magnetic field. As the emission cross-section of HXR strongly depends on the angle to the drift direction of energetic electrons, that is the magnetic filed line, this disagreement of the angles makes significant difference between the signals of detectors located on the top and bottom. As the result, the poloidal magnetic field is able to be derived from the difference of the HXR emission along the top and bottom ILOS. The method was applied to the full LHCD plasmas on the TRIMA-1M tokamak and the plasma current around the magnetic axis was estimated.

AB - A new technique to measure the current profile in lower hybrid current drive (LHCD) plasmas by using hard X-ray (HXR) energy spectrum measurement along the top and bottom identical line of sight (ILOS) is proposed. An angle between ILOS and the magnetic filed line is out of alignment from the perpendicular by the poloidal magnetic field. As the emission cross-section of HXR strongly depends on the angle to the drift direction of energetic electrons, that is the magnetic filed line, this disagreement of the angles makes significant difference between the signals of detectors located on the top and bottom. As the result, the poloidal magnetic field is able to be derived from the difference of the HXR emission along the top and bottom ILOS. The method was applied to the full LHCD plasmas on the TRIMA-1M tokamak and the plasma current around the magnetic axis was estimated.

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