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

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

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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.

Original language	English
Pages (from-to)	283-285
Number of pages	3
Journal	Fusion Science and Technology
Volume	51
Issue number	2T
Publication status	Published - 1 Feb 2007

Keywords

beam emission
beam attenuation
quartz optical fiber
heavy ions

Cite this

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title = "Beam emission diagnostic for estimating neutral beam attenuation",

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.",

keywords = "beam emission, beam attenuation, quartz optical fiber, heavy ions",

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

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

year = "2007",

month = feb,

day = "1",

language = "English",

volume = "51",

pages = "283--285",

journal = "Fusion Science and Technology",

issn = "1536-1055",

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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

Y1 - 2007/2/1

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

UR - http://www.new.ans.org/pubs/journals/fst/a_1376

M3 - Article

VL - 51

SP - 283

EP - 285

JO - Fusion Science and Technology

JF - Fusion Science and Technology

SN - 1536-1055

IS - 2T

ER -

Beam emission diagnostic for estimating neutral beam attenuation

Abstract

Keywords

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