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

Fluid-numerical studies of high-density theta-pinch implosion including classical and anomalous transport processes

B.H. Hui, S. Hamasaki, R.C. Davidson1976年被引用 10Nuclear FusionIF 3出版社

For parameters appropriate to high-density pinch experiments (ne ⪆ 1014 cm−3) it is shown that both classical transport processes and anomalous transport processes can play an important role during the implosion. The fluid-numerical model of Liewer and Krall has been modified and extended to include (in addition to turbulent transport) the effects of classical transport (e.g. frictional force, thermal force, heat conduction, heat convection, resistive heating and thermalization), as well as the effects of ionization, neutral-particle diffusion and charge exchange. Numerical studies of the early and intermediate stages of implosion are presented for parameters appropriate to Scylla 1-B and Scyllac. It is found that the relative importance of the various transport processes depends in detail on radial location, initial ionization level, bias field, etc. As a general remark, however, anomalous transport processes tend to dominate in the sheath region and behind the piston (where the current and temperature are relatively high), whereas classical transport processes are important in front of the piston (where the density is high and the temperature is relatively low). Moreover, for sufficiently large initial neutral density, the effects of charge exchange, neutral-particle diffusion, and ionization, are found to be significant during the implosion.

日本語訳

高密度ピンチ実験(ne ⪆ 10^14 cm^-3)に適したパラメータに対して、古典的輸送過程と異常輸送過程の両方がピンチ収縮中に重要な役割を果たし得ることが示されている。LiewerとKrallの流体数値モデルは、乱流輸送に加えて、古典的効果(例えば、摩擦力、熱力、熱伝導、抵抗加熱、熱化)ならびに電離、中性粒子拡散、電荷交換の効果を含むように修正・拡張されている。Scylla 1-BおよびScyllacに適したパラメータに対するピンチ収縮の初期段階および中間段階の数値研究が提示されている。種々の輸送過程の相対的重要度は、半径方向の位置、初期電離度、バイアス磁場などに詳細に依存することが見出されている。しかしながら、一般的な見解として、異常輸送過程はシース領域およびピストン背後(電流と温度が比較的高い領域)で支配的となる傾向があり、一方、古典的輸送過程はピストン前方(密度が高く温度が比較的低い領域)で重要である。さらに、初期中性粒子密度が十分に大きい場合、電荷交換、中性粒子拡散、および電離の効果はピンチ収縮中に有意であることが見出されている。

wiki

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

関連論文

Anomalous transport in high-temperature plasmas with applications to solenoidal fusion systems

1977Nuclear Fusion

Behaviour of electron and ion transport in discharges with an internal transport barrier in the DIII-D tokamak

1999Nuclear Fusion

Turbulence-reduced high-performance scenarios in Wendelstein 7-X

2024Nuclear Fusion

Observation of enhanced ion particle transport in mixed H/D isotope plasmas on JET

2018Nuclear Fusion

Inference of main ion particle transport coefficients with experimentally constrained neutral ionization during edge localized mode recovery on DIII-D

2023Nuclear Fusion

Importance of collisions with the main plasma components for impurity anomalous transport

2009Nuclear Fusion

Anomalous impurity transport: charge-state diffusion due to atomic processes in tokamak plasmas

1999Plasma Physics and Controlled Fusion

Particle transport in reduced turbulence neutral beam heated discharges at Wendelstein 7-X

2024Nuclear Fusion

Transport in tokamaks – a review of experiment

1983Nuclear Fusion

The effect of turbulent stresses on the experimental determination of a thermal diffusivity due to turbulent transport

2003Plasma Physics and Controlled Fusion