• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Plasma physics and controlled fusion >Implementation of a 3D halo neutral model in the TRANSP code and application to projected NSTX-U plasmas
【24h】

Implementation of a 3D halo neutral model in the TRANSP code and application to projected NSTX-U plasmas

机译：TRANSP代码中3D晕光中性模型的实现及其在预计的NSTX-U等离子体中的应用

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A 3D halo neutral code developed at the Princeton Plasma Physics Laboratory and implemented for analysis using the TRANSP code is applied to projected National Spherical Torus eXperiment-Upgrade (NSTX-U plasmas). The legacy TRANSP code did not handle halo neutrals properly since they were distributed over the plasma volume rather than remaining in the vicinity of the neutral beam footprint as is actually the case. The 3D halo neutral code uses a 'beam-in-a-box' model that encompasses both injected beam neutrals and resulting halo neutrals. Upon deposition by charge exchange, a subset of the full, one-half and one-third beam energy components produce first generation halo neutrals that are tracked through successive generations until an ionization event occurs or the descendant halos exit the box. The 3D halo neutral model and neutral particle analyzer (NPA) simulator in the TRANSP code have been benchmarked with the Fast-Ion D-Alpha simulation (FIDAsim) code, which provides Monte Carlo simulations of beam neutral injection, attenuation, halo generation, halo spatial diffusion, and photoemission processes. When using the same atomic physics database, TRANSP and FIDAsim simulations achieve excellent agreement on the spatial profile and magnitude of beam and halo neutral densities and the NPA energy spectrum. The simulations show that the halo neutral density can be comparable to the beam neutral density. These halo neutrals can double the NPA flux, but they have minor effects on the NPA energy spectrum shape. The TRANSP and FIDAsim simulations also suggest that the magnitudes of beam and halo neutral densities are relatively sensitive to the choice of the atomic physics databases.
机译：由普林斯顿等离子体物理实验室开发并使用TRANSP代码实现分析的3D晕光中性代码被应用于预计的国家球形圆环实验技术升级（NSTX-U等离子体）。传统的TRANSP代码无法正确处理晕圈中性，因为它们分布在等离子体上，而不是像实际情况那样保留在中性束足迹附近。 3D晕圈中性代码使用“盒中光束”模型，该模型既包含注入的光束中性，也包含生成的晕圈中性。通过电荷交换进行沉积时，全部，一半和三分之一的束能量分量的子集会产生第一代光晕中性，这些光中性在连续的世代中一直被跟踪，直到发生电离事件或后代光晕离开盒子为止。 TRANSP代码中的3D晕圈中性模型和中性粒子分析仪（NPA）模拟器已通过快速离子D-Alpha模拟（FIDAsim）代码进行了基准测试，该代码提供了光束中性注入，衰减，晕圈产生，晕圈的蒙特卡洛模拟空间扩散和光发射过程。当使用相同的原子物理学数据库时，TRANSP和FIDAsim模拟在射束和晕圈中性密度的空间分布和大小以及NPA能谱方面取得了极好的一致性。仿真表明，光晕中性密度可以与光束中性密度相媲美。这些晕圈中性点可使NPA通量增加一倍，但对NPA能谱形状影响较小。 TRANSP和FIDAsim仿真还表明，束和晕圈中性密度的大小对原子物理学数据库的选择相对敏感。

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