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首页> 外文期刊>Japanese Journal of Applied Physics. Part 1, Regular Papers & Short Notes >Reduction of Thermal Wall Load by Gas Puffing in Reversed-Field Pinch Device, TPE-RX
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Reduction of Thermal Wall Load by Gas Puffing in Reversed-Field Pinch Device, TPE-RX

机译：TPE-RX反向场收缩装置中的气体抽吸减少了热壁负荷

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摘要

We report that the thermal wall load due to locked modes can be decreased by means of gas puffing in the reversed-field pinch (RFP) device, TPE-RX [Y. Yagi et al.: Fus. Eng. Design 45 (1999) 409]. Under standard RFP operation in TPE-RX, the phase- and wall-locked modes, i.e., spatially localized and stationary magnetic perturbations, respectively, appear after the current-rising phase. The locked modes cause a severe thermal wall load of the order of 100MW/m~2 on the first wall. It is estimated that the temperature on the plasma-facing wall at the mode-locking position sometimes exceeds the melting temperature of stainless steel. The thermal wall load increases with plasma current, I_p. We have succeeded in mitigating the high thermal wall load by gas puffing during discharges. It is shown that the maximum temperature increment of the vacuum vessel wall is halved when a gas-puffing rate of 200 Pa m~3/s is applied at I_p = 350 kA. The characteristics of the temperature increase of the vacuum vessel are presented, and they indicate the nature of the locked mode in RFP discharges in TPE-RX.
机译：我们报告说，可以通过在反向场收缩（RFP）装置TPE-RX [Y. Yagi等：Fus。 。设计45（1999）409]。在TPE-RX中以标准RFP操作进行操作时，在电流上升阶段之后，分别出现了相位锁定模式和壁锁定模式，即空间局部和静态磁扰动。锁定模式会在第一壁上造成大约100MW / m〜2的严重热壁负荷。据估计，在锁模位置的面向等离子体的壁上的温度有时会超过不锈钢的熔化温度。热壁负载随等离子电流I_p的增加而增加。我们已经通过在放电过程中通过吹气成功地减轻了热壁的高负荷。结果表明，当在I_p = 350 kA下施加200 Pa m〜3 / s的抽气速率时，真空容器壁的最大温度增量减半。给出了真空容器温度升高的特征，它们表明了TPE-RX中RFP放电中锁定模式的性质。

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