• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Plasma and Fusion Research >Design of a Vacuum Pumping System for the Closed Helical Divertor for Steady State Operation in LHD
【24h】

Design of a Vacuum Pumping System for the Closed Helical Divertor for Steady State Operation in LHD

机译：LHD稳态运行中用于闭合螺旋分流器的真空泵系统的设计

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A vacuum pumping system is installed in a Closed Helical Divertor (CHD) in the Large Helical Device (LHD) at the National Institute for Fusion Science for active control of the peripheral plasma density and impurity suppression in the core plasma. In the CHD configuration, the distance between the pumping system and the divertor plates (heat and particle source) is very short (only ～0.1 m). One of the major issues in designing the pumping system is the reduction of heat load by radiation and thermal conduction due to the neutral particles being released from the heated divertor plates while keeping a high pumping efficiency. Here the heat load and the pumping efficiency are analyzed using a neutral particle transport simulation and a finite element method based software for multi-physics analysis. We propose a new design for a pumping system with an expanded area of the inlet of the water-cooled blinds and a bottom slit beneath the pumping system. This increases the pumping efficiency by approximately 60% over that of our previous design. It also predicts that the increase in heat load on the pumping system for the new design would be reasonably suppressed by a buffer plate with high emissivity on the surface of the vacuum vessel on the inboard side of the torus.
机译：真空泵系统安装在美国国家融合科学研究院大型螺旋装置（LHD）的封闭式螺旋分流器（CHD）中，用于主动控制外围等离子体密度和核心等离子体中的杂质抑制。在CHD配置中，泵系统与分流板（热源和颗粒源）之间的距离非常短（仅约0.1 m）。设计泵系统的主要问题之一是由于中性粒子从加热的偏滤板上释放，同时又保持了很高的泵效率，因此通过辐射和热传导来减少热负荷。在此，使用中性粒子传输模拟和基于有限元方法的软件进行多物理场分析，分析热负荷和泵送效率。我们提出了一种用于抽水系统的新设计，该系统具有扩大的水冷百叶窗入口的面积以及在抽水系统下方的底部狭缝。与我们以前的设计相比，这使抽气效率提高了约60％。它还预测，对于新设计，在抽气系统上的热负荷的增加将被圆环内侧真空容器表面上具有高发射率的缓冲板合理地抑制。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号