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

Simulated correction to poloidal charge-exchange recombination spectroscopy measurement in a tokamak

B J Ding, Y Sakamoto, Y Miura2005年Plasma Physics and Controlled FusionIF 2.2出版社

Taking into account the effects of atomic processes and the observation angle, a simple code modelling the correction to the poloidal charge-exchange recombination spectroscopy (CXRS) measurement in a tokamak is developed, which is an effective tool to correct the deviation in CXRS measurements. The simulated results show that the measured poloidal velocity shift is overestimated in the ion diamagnetic drift direction and the apparent ion temperature is underestimated because of the effects of the energy-dependent emission rate, finite lifetime of excited ions and the observation direction. This deviation will be more obvious with an increase in temperature, magnetic field, or observation angle. In the core region, the pseudo-shift coming from the observation angle effect is much more significant than that from others. The contributions from gradients of density and temperature are negligible compared to that from emission rate, lifetime and observation angle effects. Using the corrected velocity, a radial electric field (Er) well is formed near the internal transport barrier (ITB) location for a typical plasma on the Japan Atomic Energy Research Institute Tokamak-60 Upgrade (JT-60U). It seems that the poloidal rotation enhances Er shear, which is speculated to be related to the ITB formation.

日本語訳

トカマクにおけるポロイダル電荷交換再結合分光(CXRS)測定の補正をモデル化する簡易コードを、原子過程と観測角度の影響を考慮して開発した。これはCXRS測定における偏差を補正するための有効なツールである。シミュレーション結果は、エネルギー依存の放射率、励起イオンの有限寿命、および観測角度の影響により、測定されるポロイダル速度がイオン反磁性ドリフト方向に過大評価され、見かけのイオン温度が過小評価されることを示している。この偏差は、温度、磁場、または観測角度の増加に伴いより顕著になる。コア領域では、観測角度効果に起因する擬似シフトが他の効果によるものよりもはるかに大きい。密度勾配と温度勾配による寄与は、放射率、寿命、および観測角度の効果と比較して無視できる程度である。補正された速度を用いると、日本原子力研究所トカマク60アップグレード(JT-60U)の典型的なプラズマにおいて、内部輸送障壁(ITB)位置の近傍で径方向電場(Er)の井戸が形成される。ポロイダル回転がErのシアを強化していると思われ、これはITB形成に関連していると推測される。

wiki

Charge Exchange Recombination SpectroscopyCharge exchange recombination
この論文にはまだAI要約がありません。

関連論文

Poloidally resolved measurements of the perpendicular propagation velocity of density fluctuations in ASDEX Upgrade L-mode plasmas

2021Plasma Physics and Controlled Fusion

Radial electric field in JET advanced tokamak scenarios with toroidal field ripple

2009Plasma Physics and Controlled Fusion

Measurement and physical interpretation of the mean motion of turbulent density patterns detected by the beam emission spectroscopy system on the mega amp spherical tokamak

2012Plasma Physics and Controlled Fusion

Experimental investigation of ion-temperature-gradient-like turbulence characteristics in T-10 core plasmas with toroidal and poloidal correlation reflectometry

1999Nuclear Fusion

Fuel ion rotation measurement and its implications on H-mode theories

1994Plasma Physics and Controlled Fusion

Plasma edge transport phenomena caused by particle drifts and sources in TEXTOR

2003Nuclear Fusion

Measurement of poloidal flow, radial electric field and E × B shearing rates at ASDEX Upgrade

2001Nuclear Fusion

3D structure of density fluctuations in the T-10 tokamak and new approach for current profile estimation

2019Nuclear Fusion

Internal magnetic fluctuations and electron heat transport in the Tore Supra tokamak: Observation by cross-polarization scattering

1998Nuclear Fusion

Plasma rotation evolution near the peripheral transport barrier in the presence of low-frequency MHD bursts in TUMAN-3M tokamak

2006Plasma Physics and Controlled Fusion