综合分析使用气体和颗粒状注射在ITER类Tokamaks中的破坏减轻方法
1Center for Materials under Extreme Environment (CMUXE), Purdue University, West Lafayette, IN, 47907, USA. vsizyuk@purdue.edu.
Scientific reports
|September 22, 2025
概括
惰性气体注射有效地屏蔽了聚变装置中的面向等离子体的表面. 这种方法优化了气的参数,以保护ITER托卡马克组件在等离子体不稳定期间免受侵蚀,从而提高了设备的寿命.
科学领域:
- 核聚变能源的研究.
- 等离子体物理学和工程
- 用于极端环境的材料科学.
背景情况:
- 聚变装置中的面向等离子体的表面 (PFS) 面临着短暂事件期间等离子体粒子冲击和热负荷带来的重大挑战.
- 托卡马克元件的侵蚀和污染可能会损害设备的性能和寿命.
- 中性气体注射是缓解这些影响的有希望的策略.
研究的目的:
- 调查和优化惰性气体注射方法,以在短暂事件期间保护ITER类核聚变装置中的转向器和内部表面.
- 为了减少热负荷并防止组件的蒸发.
- 分析气云在屏蔽干扰能量方面的有效性.
主要方法:
- 使用HEIGHTS包中的集成自一致模型进行详细分析.
- 模拟的二次等离子生成,辐射特性和注入惰性气体的屏蔽效果.
- 多种气云密度,大小和位置,以最大限度地减少沉积的破坏能量.
主要成果:
- 确定了气注入的最佳参数,以完全保护ITER托卡马克表面在等离子体不稳定期间免受侵蚀和蒸发的影响.
- 证明了显著降低分流器组件热负荷的潜力.
- 评估了气云参数对屏蔽有效性的影响.
结论:
- 惰性气体屏蔽,特别是使用注射,是一种有效的机制,用于在聚变装置中的短暂事件期间保护面向等离子体的表面.
- 优化的Ar气体注入可以显著提高ITER和未来DEMO设备中组件的寿命.
- 内部设计的轻微修改,加上气体注入,可以进一步改进干扰减缓策略.
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