兰州320 kV高压平台低能核天体物理实验研究进展（英文）
发布时间：2019-06-10 22:15
【摘要】：在低温核天体物理环境下,如静态核稳定燃烧阶段的核反应都发生较低的能区,其伽莫夫窗口内的核反应截面非常小,这就需要加速器提供较强束流才能完成核反应截面的直接测量。最近在中国科学院近代物理的320 k V高压平台上建立了低能核天体物理实验室以及相应的研究平台。驱动该平台的是一个14.5 GHz的永磁铁型ECR离子源,它能够提供非常强的束流离子。对于质子和氦离子,离子源出口的最大流强可以达到100 eμA,在实验终端上可以获得大约30 eμA的流强。基于此强流加速器装置,我们建立了核天体物理实验测量装置,包括靶室以及带电粒子和伽玛射线探测器等设备。利用已知的核反应对探测器性能和实验方法进行了一系列测试。同时,展示了近年来取得的一些主要实验结果。最后,对该平台上开展工作的前景进行了展望,并指出基于该地面装置的低能核反应研究所积累的技术及经验对于我国锦屏深地核天体物理JUNA项目的重要意义。
[Abstract]:In the low temperature nuclear Astrophysical environment, such as the static nuclear stable combustion stage, the nuclear reaction occurs in a lower energy region, and the cross section of the nuclear reaction in the Gamov window is very small. This requires the accelerator to provide a strong beam in order to complete the direct measurement of the nuclear reaction cross section. Recently, the laboratory of low energy nuclear Astrophysics and the corresponding research platform have been established on the 320kV high pressure platform of modern physics of the Chinese Academy of Sciences. The platform is driven by a 14. 5 GHz permanent magnet ECR ion source, which can provide very strong beam ions. For protons and Helium ions, the maximum flow intensity at the outlet of the ion source can reach 100e 渭 A, and the flow intensity of about 30e 渭 A can be obtained at the experimental terminal. Based on this high current accelerator, we have established a nuclear Astrophysics experimental measuring device, including target chamber, charged particles and gamma ray detector and other equipment. A series of tests on the performance and experimental methods of the detector have been carried out by using the known nuclear reaction. At the same time, some main experimental results obtained in recent years are shown. Finally, the prospect of working on the platform is prospected, and it is pointed out that the technology and experience accumulated by the low energy nuclear reaction research institute based on the ground device are of great significance to the JUNA project of Jinping Deep Earth Nuclear Astrophysics in China.
【作者单位】： 中国科学院国家天文台;中国科学院近代物理研究所;中国科学院大学;
【基金】：National Natural Science Foundation of China(11675229,11490562) National Key Research and Development Plan(2016YFA0400503)~~
【分类号】：P142
，
本文编号：2496776
[Abstract]:In the low temperature nuclear Astrophysical environment, such as the static nuclear stable combustion stage, the nuclear reaction occurs in a lower energy region, and the cross section of the nuclear reaction in the Gamov window is very small. This requires the accelerator to provide a strong beam in order to complete the direct measurement of the nuclear reaction cross section. Recently, the laboratory of low energy nuclear Astrophysics and the corresponding research platform have been established on the 320kV high pressure platform of modern physics of the Chinese Academy of Sciences. The platform is driven by a 14. 5 GHz permanent magnet ECR ion source, which can provide very strong beam ions. For protons and Helium ions, the maximum flow intensity at the outlet of the ion source can reach 100e 渭 A, and the flow intensity of about 30e 渭 A can be obtained at the experimental terminal. Based on this high current accelerator, we have established a nuclear Astrophysics experimental measuring device, including target chamber, charged particles and gamma ray detector and other equipment. A series of tests on the performance and experimental methods of the detector have been carried out by using the known nuclear reaction. At the same time, some main experimental results obtained in recent years are shown. Finally, the prospect of working on the platform is prospected, and it is pointed out that the technology and experience accumulated by the low energy nuclear reaction research institute based on the ground device are of great significance to the JUNA project of Jinping Deep Earth Nuclear Astrophysics in China.
【作者单位】： 中国科学院国家天文台;中国科学院近代物理研究所;中国科学院大学;
【基金】：National Natural Science Foundation of China(11675229,11490562) National Key Research and Development Plan(2016YFA0400503)~~
【分类号】：P142
，
本文编号：2496776
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