基于ZrC发射器的ITER诊断压力表的寿命和机械负荷方面的验证
H Meister1, F Mackel1, P Andrew2
1Max-Planck-Institute for Plasma Physics, Boltzmannstr. 2, 85748 Garching, Germany.
The Review of scientific instruments
|July 26, 2024
概括
为了确保ITER.
科学领域:
- 等离子体物理学和核聚变能源研究.
- 真空技术和诊断.
背景情况:
- ITER需要热阴极电离仪来监测真空容器内的中性气体压力.
- 使用碳化 (ZrC) 发射器的新型测量设计面临着由于烧解石墨侵蚀的终身问题.
- 这种侵蚀可能会阻止诊断系统满足ITER固有的99.8%可用性要求.
研究的目的:
- 研究改善ITER新型热阴极电离仪寿命的方法.
- 评估介层对ZrC发射器在运行压力下耐用性的影响.
- 为了根据ITER严格的可用性要求验证仪表的性能和可靠性.
主要方法:
- 使用 (W), (Ir) 和 (Mo) 薄膜间层进行了长期运行测试.
- 测试是在恒定的20 Pa H2大气中进行的,以模拟操作条件.
- 随后的振动和开启/关闭周期测试评估了测量器对地震,中断和运行负载的弹性.
主要成果:
- 最长的运行寿命为860小时,使用皮介层实现.
- 振动测试证实了发射器的生存,即使在显著的 pyrolytic 石墨侵蚀后.
- 测量仪在额外的启/关周期测试后仍然完全正常运行.
结论:
- 使用介层显著提高了新ZrC发射器仪表的寿命.
- 标尺设计证明了对机械和操作应力的强度.
- 这些改进,加上修订的运营和RAMI计划,有助于满足ITER对诊断系统的可用性要求.
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