南方能源建设2024，Vol.11Issue(3)：81-86,6.DOI:10.16516/j.ceec.2024.3.09
长脉冲高功率负离子源实验平台量热靶研制
Development of Calorimeter Target for Long Pulse High Power Negative Ion Source Test Platform
摘要
Abstract
[Introduction]High energy,strong current,and long pulse neutral beam negative ion source technology are one of the core technologies for achieving combustion conditions in magnetic confinement fusion reactor plasma.To meet the beam diagnostic requirements of the long pulse high-power negative ion source experimental platform under the parameters of 200 kV/20 A,a calorimeter target has been developed for intercepting negative ion beams or neutral beams,diagnosing the power density distribution and beam divergence angle of the two beams,as well as the neutralization efficiency of negative ions and other performance parameters.[Method]Based on the existing structure of the experimental platform vacuum chamber and the size of the extraction electrode,the Matlab program was used to obtain the power density distribution and beam spot size of the negative ion beam generated by the negative ion source at the front end of the calorimeter target at a beam divergence angle of 1° under this parameter.Subsequently,the physical structure of the calorimeter target with a V-shaped target plate was designed.On this basis,Workbench software was used to simulate the thermal load of the oxygen-free copper V-shaped target plate structure under full power operation and obtain the temperature distribution of the calorimeter target during long pulse operation with a water flow rate of 80 m3/h.The highest temperature was 610 ℃.[Results]Based on the simulation calculation results,and in combination with the engineering structure and diagnostic requirements of the experimental platform,the engineering design of the calorimeter target was completed.[Conclusion]The calorimeter target adopts magnetic fluid vacuum sealing to achieve the opening and closing of the V-shaped target plate,and a thermocouple array is arranged on the back of the target plate to monitor the temperature of the target plate in real time.The calorimeter target engineering has a compact structure,and its installation size can be compatible with ion beam diagnostic vacuum chambers and neutral beam diagnostic vacuum chambers,meeting diagnostic requirements and enabling safe operation with long pulses.关键词
负离子源/中性束/量热靶/热负荷/核聚变Key words
negative ion source/neutral beam/calorimeter target/thermal load/nuclear fusion分类
能源科技引用本文复制引用
周红霞,万银祥,周博文,余珮炫,唐珮钦,魏会领..长脉冲高功率负离子源实验平台量热靶研制[J].南方能源建设,2024,11(3):81-86,6.基金项目
国家自然科学基金联合基金项目/重点支持项目/区域创新发展联合基金"强流长脉冲负氢离子源引出束综合性能优化研究"(U19A20112) （U19A20112）
四川省科技计划"负氢离子源中电子行为对负氢离子产生效率的研究"(2022JDRC0094) （2022JDRC0094）
西南物理研究院创新项目"基于负离子源的HL-2M装置NNBI离子源研发及束线设计"(201901XWCXRZ001) （201901XWCXRZ001）
