模拟来自ASTERICS ECR离子源的表面X射线辐射
T Thuillier1, A Cernuschi1, B Cheymol1
1Université Grenoble Alpes, CNRS-LPSC, INP Grenoble, Grenoble, France.
The Review of scientific instruments
|November 18, 2025
概括
模拟了来自等离子电子冲击离子源壁的制动辐射X射线辐射. 开发了屏蔽策略,将X射线剂量降低到每千瓦1μSvh-1以下,确保运行安全.
科学领域:
- 等离子体物理学的物理学
- 粒子加速器的使用情况
- 辐射屏蔽 辐射屏蔽
背景情况:
- 电子循环子共振离子源 (ECRIS) 对于各种应用至关重要.
- 不受限制的等离子电子撞击室壁会产生bremsstrahlungX射线.
- 了解和减轻这种X射线辐射对于ECRIS的安全和运行至关重要.
研究的目的:
- 为了调查ECRIS的制动辐射X射线辐射.
- 量化X射线剂量及其对磁场强度 (Bmin) 的依赖.
- 为ECRIS设计有效的屏蔽解决方案.
主要方法:
- 使用一套两个模拟代码进行X射线辐射分析.
- 在离子源内部和周围映射X射线剂量.
- 使用Fluka模拟代码进行参数研究.
主要成果:
- 电子温度分布尾在墙壁是异构的,并随着Bmin.增加.
- 电子与具有广角分布 (5°-25°) 的墙壁相撞.
- 没有屏蔽的X射线剂量在5米处达到每千瓦100μSv h-1;屏蔽将其降低到每千瓦<1μSv h-1.
结论:
- 不同类型的电子分布和角度冲击影响X射线发射.
- 展示了有效的内部和外部屏蔽设计.
- 模拟的热沉积与特定电子温度的实验发现一致.
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