Beam emission diagnostic for estimating neutral beam attenuation

K. Ikeda, M. Osakabe, A. Whiteford, Y. Takeiri, O. Kaneko, T. Kato, I. Murakami, K. Nagaoka, Y. Oka, H. Summers, K. Tsumori, LHD experiment grp

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Neutral beam attenuation has been investigated by the beam emission diagnostic system at LHD which consists of a quartz optical fiber, leading to a spectrometer and an ICCD detector. The spectral resolution and the reciprocal dispersion are 0.21 nm and 1.4 nm/mm, respectively. The behavior of the beam-stopping cross-section derived from the beam emission is consistent with that of the cross-section from the Atomic Data and Analysis Structure (ADAS) database. The intensity of the beam emission decreases with increasing stopping cross-section from the use of heavy ions in a discharge. We have also observed that the measured cross-section of the hydrogen is larger than that of the ADAS calculation.
LanguageEnglish
Pages283-285
Number of pages3
JournalFusion Science and Technology
Volume51
Issue number2T
Publication statusPublished - 1 Feb 2007

Fingerprint

Heavy Ions
Quartz
Spectral resolution
neutral beams
Heavy ions
Spectrometers
Optical fibers
Hydrogen
estimating
attenuation
Detectors
cross sections
stopping
data structures
spectral resolution
heavy ions
quartz
optical fibers
spectrometers
detectors

Keywords

  • beam emission
  • beam attenuation
  • quartz optical fiber
  • heavy ions

Cite this

Ikeda, K., Osakabe, M., Whiteford, A., Takeiri, Y., Kaneko, O., Kato, T., ... grp, LHD. E. (2007). Beam emission diagnostic for estimating neutral beam attenuation. Fusion Science and Technology, 51(2T), 283-285.
Ikeda, K. ; Osakabe, M. ; Whiteford, A. ; Takeiri, Y. ; Kaneko, O. ; Kato, T. ; Murakami, I. ; Nagaoka, K. ; Oka, Y. ; Summers, H. ; Tsumori, K. ; grp, LHD experiment. / Beam emission diagnostic for estimating neutral beam attenuation. In: Fusion Science and Technology. 2007 ; Vol. 51, No. 2T. pp. 283-285.
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Ikeda, K, Osakabe, M, Whiteford, A, Takeiri, Y, Kaneko, O, Kato, T, Murakami, I, Nagaoka, K, Oka, Y, Summers, H, Tsumori, K & grp, LHDE 2007, 'Beam emission diagnostic for estimating neutral beam attenuation' Fusion Science and Technology, vol. 51, no. 2T, pp. 283-285.

Beam emission diagnostic for estimating neutral beam attenuation. / Ikeda, K.; Osakabe, M.; Whiteford, A.; Takeiri, Y.; Kaneko, O.; Kato, T.; Murakami, I.; Nagaoka, K.; Oka, Y.; Summers, H.; Tsumori, K.; grp, LHD experiment.

In: Fusion Science and Technology, Vol. 51, No. 2T, 01.02.2007, p. 283-285.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Beam emission diagnostic for estimating neutral beam attenuation

AU - Ikeda, K.

AU - Osakabe, M.

AU - Whiteford, A.

AU - Takeiri, Y.

AU - Kaneko, O.

AU - Kato, T.

AU - Murakami, I.

AU - Nagaoka, K.

AU - Oka, Y.

AU - Summers, H.

AU - Tsumori, K.

AU - grp, LHD experiment

N1 - 6th International Conference on Open Magnetic Systems for Plasma Confinement, Tsukuba, JAPAN, JUL 17-21, 2006

PY - 2007/2/1

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N2 - Neutral beam attenuation has been investigated by the beam emission diagnostic system at LHD which consists of a quartz optical fiber, leading to a spectrometer and an ICCD detector. The spectral resolution and the reciprocal dispersion are 0.21 nm and 1.4 nm/mm, respectively. The behavior of the beam-stopping cross-section derived from the beam emission is consistent with that of the cross-section from the Atomic Data and Analysis Structure (ADAS) database. The intensity of the beam emission decreases with increasing stopping cross-section from the use of heavy ions in a discharge. We have also observed that the measured cross-section of the hydrogen is larger than that of the ADAS calculation.

AB - Neutral beam attenuation has been investigated by the beam emission diagnostic system at LHD which consists of a quartz optical fiber, leading to a spectrometer and an ICCD detector. The spectral resolution and the reciprocal dispersion are 0.21 nm and 1.4 nm/mm, respectively. The behavior of the beam-stopping cross-section derived from the beam emission is consistent with that of the cross-section from the Atomic Data and Analysis Structure (ADAS) database. The intensity of the beam emission decreases with increasing stopping cross-section from the use of heavy ions in a discharge. We have also observed that the measured cross-section of the hydrogen is larger than that of the ADAS calculation.

KW - beam emission

KW - beam attenuation

KW - quartz optical fiber

KW - heavy ions

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Ikeda K, Osakabe M, Whiteford A, Takeiri Y, Kaneko O, Kato T et al. Beam emission diagnostic for estimating neutral beam attenuation. Fusion Science and Technology. 2007 Feb 1;51(2T):283-285.