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Characteristics of Radiating Collapse at the Density Limit in the Large Helical Device
http://hdl.handle.net/10655/8992
http://hdl.handle.net/10655/8992f780a0a8-dbb3-46cc-b196-009188da7bcc
名前 / ファイル | ライセンス | アクション |
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pfr2006_01-045.pdf (1.3 MB)
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Item type | 学術雑誌論文 / Journal Article_02(1) | |||||
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公開日 | 2013-01-31 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Characteristics of Radiating Collapse at the Density Limit in the Large Helical Device | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Large Helical Device | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | density limit | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | radiating collapse | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | carbon impurity | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | edge electron temperature | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | imaging bolometer | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | poloidal asymmetry | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
著者 |
PETERSON, Byron
× PETERSON, Byron× MIYAZAWA, Junichi× NISHIMURA, Kiyohiko× MASUZAKI, Suguru× NAGAYAMA, Yoshio× OHYABU, Nobuyoshi× YAMADA, Hiroshi× YAMAZAKI, Kozo× KATO, Takako× MURAKAMI, Izumi× ASHIKAWA, Naoko× XU, Yuhong× KOSTRIOUKOV, Artem Y.× LIU, Yi× SAKAMOTO, Ryuichi× GOTO, Motoshi× NARIHARA, Kazumichi× OSAKABE, Masaki× TANAKA, Kenji× TOKUZAWA, Tokihiko× SHOJI, Mamoru× FUNABA, Hisamichi× MORITA, Shigeru× MORISAKI, Tomohiro× KANEKO, Osamu× KAWAHATA, Kazuo× KOMORI, Akio× SUDO, Shigeru× MOTOJIMA, Osamu× the, LHD Experiment Group |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Steady state densities of up to 1.6 × 1020 m-3 have been sustained using gas puff fuelling and NBI heating up to 11 MW in the Large Helical Device (LHD). The density limit in LHD is observed to be greater than 1.6 times the Sudo limit. The density is ultimately limited by a radiating collapse which is attributed to the onset of a radiative thermal instability of the light impurities in the edge region of the plasma based on several recent observations in LHD. First of all the onset of the radiative thermal instability is tied to a certain edge temperature threshold. Secondly, the onset of the thermal instability occurs first in oxygen and then carbon as expected from their cooling rate temperature dependencies. Finally, radiation profiles show that as the temperature drops and the plasma collapses the radiating zone broadens and moves inward. In addition, comparison of impurity lines with the total radiated power behaviour suggests that carbon is the dominant radiator. Two dimensional tomographic inversions of Absolute eXtreme UltraViolet Diode (AXUVD) array data and comparison of modelling with images of radiation brightness from imaging bolometers indicate that the poloidal asymmetry which accompanies the radiating collapse is roughly toroidally symmetric. | |||||
書誌情報 |
en : Plasma and Fusion Research 巻 Vol.1, p. 045-1 - 045-9, 発行日 2006-10-01 |
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出版者 | ||||||
出版者 | プラズマ・核融合学会 | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | 10.1585/pfr.1.045 | |||||
権利 | ||||||
権利情報 | (c) 2006 The Japan Society of Plasma Science and Nuclear Fusion Research |