FusionPapers
図版検索トレンドwiki日本の研究
© 2026 FUSIONPAPERS
About法務情報
トップに戻る

Thermal load distribution on the ALT-II limiter of TEXTOR-94 during RI mode operation and during disruptions

K.H. Finken, T. Denner, G. Mank2000年被引用 24Nuclear FusionIF 3出版社

Thermographic measurements using an IR scanner have been performed at the pump limiter ALT-II of TEXTOR-94 during RI mode discharges and during disruptions. The measurements on the RI mode discharges were done to complete the TEXTOR database which had shown a structured decay pattern of the deposited power. It was found that the underlying radial heat flux can be described by two exponential decay functions. This structure, which generates an unexpected heat component close to the tangent line, has been observed in all discharge conditions including the RI mode. During disruptions, the heat is released in short pulses with a typical duration of 0.01-0.1 ms. The radial decay length of these pulses has a similar shape to the heat flux during normal discharges: it consists again of a strong component close to the tangent line with a radial decay length of 2-5 mm and probably one with a decay length of the order of 1 cm. The heat is released at the time when the edge electron temperature of the plasma drops, when intense hydrogen and carbon fluxes occur near the walls, and when electrical currents in the limiter blades are excited. In a tentative interpretation, the temporal and spatial structure of the heat pulse is attributed to the presence and growth of a laminar zone at the plasma edge, which is connected with the ergodization of the plasma edge during a disruption.

日本語訳

TEXTOR-94のALT-IIポンプリミッターにおいて、RIモード放電中およびディスラプション中に、IRスキャナーを用いたサーモグラフィ測定を実施した。RIモード放電中の測定は、堆積パワーの構造化された減衰パターンを示したTEXTORデータベースを補完するために行われた。その結果、基礎となる径方向熱流束は、2つの指数減衰関数によって記述できることが見出された。接線近傍に予期しない熱成分を生成するこの構造は、RIモードを含むすべての放電条件で観測された。ディスラプション中、熱は典型的な持続時間0.01〜0.1msの短いパルスとして放出される。これらのパルスの径方向減衰長は、通常放電中の熱流束と同様の形状を示す:すなわち、接線近傍に径方向減衰長2〜5mmの強い成分と、おそらく1cm程度の減衰長を持つ成分から再び構成される。熱は、プラズマ端部の電子温度が低下する時、壁近傍で強い水素フラックスと炭素フラックスが発生する時、そしてリミッター羽根に電流が励起される時に放出される。暫定的な解釈として、熱パルスの時間的・空間的構造は、ディスラプション中のプラズマ端部のエルゴダイゼーションに関連する層状ゾーンの存在と成長に帰属される。

装置

textor高精度(タイトル一致)

wiki

Plasma disruptionLimiterTEXTOR
この論文にはまだAI要約がありません。

関連論文

Energy flux to the textor limiters during disruptions

1992Nuclear Fusion

Heat flux decay length during RF power operation in the Tore Supra tokamak

2014Nuclear Fusion

Modeling of heat flux on the main limiter in EAST

2025Nuclear Fusion

Divertor power loads and scrape off layer width in the large aspect ratio full tungsten tokamak WEST

2021Nuclear Fusion

Transport through dissipative trapped electron mode and toroidal ion temperature gradient mode in TEXTOR

1988Nuclear Fusion

Overview of the first Wendelstein 7-X long pulse campaign with fully water-cooled plasma facing components

2024Nuclear Fusion

Numerical investigation of plasma edge transport and limiter heat fluxes in Wendelstein 7-X startup plasmas with EMC3-EIRENE

2017Nuclear Fusion

An assessment of the first wall and limiter erosion during limiter discharge stages in DEMO

2019Nuclear Fusion

Density behaviour and particle losses in RF discharge plasmas of the URAGAN-3M torsatron

1996Nuclear Fusion

Preliminary study on heat load using calorimetric measurement during long-pulse high-performance discharges on EAST

2017Plasma Physics and Controlled Fusion