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用于Bernas离子源的感应高温炉研究

Research on Inductive Heating Oven for Bernas Ion Source

  • 摘要: 针对超重元素合成研究中对稀缺同位素的使用需求,设计了一种用于Bernas离子源的感应高温炉,适用于难熔金属稀缺同位素生产。其主要特点在于结构紧凑、炉头与弧腔壁直接相连,以及采用特殊的喇叭口结构将金属蒸气导入等离子体弧腔。利用ANSYS模拟软件对感应高温炉的温度分布进行了模拟计算,结果表明设计的高温炉坩埚中心温度可达1700 °C以上,能够满足所需难熔金属蒸气的加热需求。同时对设计的高温炉进行了离线测试,利用钨铼热电偶测量了坩埚内部的温度分布,实验结果与模拟计算结果基本一致。离线实验中坩埚能够在2000 °C高温下连续稳定运行,验证了该高温炉的长期稳定性与可靠性。搭建了Bernas离子源在线实验平台,应用感应高温炉成功实现钙离子和铬离子的产生和引出,并验证了感应高温炉和Bernas离子源结合产生难熔金属离子的可行性。

     

    Abstract: In response to the demand for scarce isotopes in the research on the synthesis of superheavy elements, an inductive high-temperature oven for the Bernas ion source has been designed and fabricated, which is used for the production of refractory metal isotopes in the field of isotope production. Its main features include a compact structure, direct connection between the oven head and the plasma chamber wall, and the use of a special bell-shaped structure to introduce metal vapor into the plasma chamber. The temperature distribution of the inductive high-temperature oven was simulated and calculated using the ANSYS simulation software. The results show that the temperature at the center of the crucible of the designed high-temperature oven can reach above 1700 °C, which can meet the heating requirements of the refractory metal vapor needed. At the same time, the designed high-temperature oven was tested off-line, and the temperature distribution inside the crucible was measured using a tungsten-rhenium thermocouple. The experimental results are basically consistent with the simulation results. In the off-line experiment, the crucible can operate continuously and stably at a high temperature of 2000 °C, verifying the long-term stability and reliability of the high-temperature oven. An online experimental platform incorporating a Bernas ion source was established. By integrating an induction furnace with the Bernas ion source, the generation and extraction of calcium and chromium ions were successfully achieved. This study preliminarily demonstrated the feasibility of combining an induction oven and a Bernas ion source to produce refractory metal ions for potential application in the fabrication of refractory metal isotopes.

     

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