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Electron cyclotron current start-up using a retarding electric field in the QUEST spherical tokamak

T. Onchi, H. Idei, K. Hanada, O. Watanabe, R. Miyata, Y. Zhang, Y. Koide, Y. Otsuka, T. Yamaguchi, A. Higashijima2024年10月Nuclear FusionIF 3出版社

The plasma current start-up experiment is conducted through electron cyclotron (EC) heating in the QUEST spherical tokamak. During the EC heating, the application of a toroidal electric field in the opposite direction to the plasma current effectively inhibits the growth of energetic electrons. Observations show rapid increases in plasma current and hard x-ray count immediately following the cancellation of the retarding electric field. When a compact tokamak configuration maintains equilibrium on the high field side, along with the retarding field, it leads to effective bulk electron heating. This heating achieved an electron temperature of Te ≈ 1 keV at electron density ne > 1.0 × 1018 m−3. Ray tracing of the EC wave verifies that more power absorption into plasma through a single-pass occurs around the second resonance layer with higher values of electron density and temperature.

日本語訳

プラズマ電流立ち上げ実験は、QUEST球状トカマクにおいて電子サイクロトロン(EC)加熱を通じて実施される。EC加熱中、プラズマ電流と逆方向のトロイダル電場の印加は、高エネルギー電子の成長を効果的に抑制する。観測によれば、減速電場の打消し直後にプラズマ電流と硬X線計数の急激な増加が見られる。高磁場側で平衡を維持するコンパクトなトカマク配位が、減速電場とともに、効果的なバルク電子加熱をもたらす。この加熱により、電子密度 ne > 1.0 × 1018 m−3 において電子温度 Te ≈ 1 keV が達成された。EC波の光線追跡は、電子密度と温度がより高い値を持つ第二共鳴層の周囲で、単一通過によるプラズマへの電力吸収がより多く生じることを検証する。

装置

quest高精度(タイトル一致)

wiki

Spherical tokamakElectron cyclotron current driveQUEST

AIによる論文要約

電子サイクロトロン電流立ち上げにおける遅延電界の使用 - QUEST球状トカマクにおける研究
JAこの論文は、トカマクやプラズマ加熱の基礎的な原理に興味のある学生や研究者に適しています。電子サイクロトロン加熱や電流立ち上げの物理過程、さらにはQUESTトカマクの最新の実験結果を理解する上で有用です。#PlasmaHeating #CurrentStart-up #ElectronCyclotronResonance #QUESTTokamak
LLM向け: {'Title': 'Electron cyclotron current start-up using a retarding electric field …

この研究では、QUESTトカマクにおける電子サイクロトロン加熱による電流立ち上げ実験について報告しています。プラズマ電流の成長を抑制するために逆方向の電界を印加し、その後の電界の解除により急激な電流増加と高エネルギー電子の発生を観察しています。高磁場側での安定平衡維持と遅延電界の組み合わせにより、1keVの電子温度と1x10^18/m^3の高密度プラズマの生成に成功しています。

Electron cyclotron current start-up using a retarding electric field in the QUEST spherical tokamak
ENThis paper would be of interest to fusion researchers and students studying plasma physics and tokamak operations. It provides insights into the use of EC heating and retarding electric fields for plasma current start-up, which is an important aspect of spherical tokamak development.#FusionResearch #PlasmaPhysics #TokamaKStartup #ElectronCyclotronHeating
LLM向け: {'Title': 'Electron cyclotron current start-up using a retarding electric field …

This paper describes how the researchers used electron cyclotron (EC) heating to start up the plasma current in the QUEST spherical tokamak. They applied a retarding electric field during the EC heating, which inhibited the growth of energetic electrons. After cancelling the retarding field, they observed rapid increases in plasma current and hard x-ray count, achieving an electron temperature of 1 keV at a density over 1e18 m-3.

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