蘭州320 kV高壓平臺低能核天體物理實驗研究進展（英文）
發(fā)布時間：2019-06-10 22:15
【摘要】：在低溫核天體物理環(huán)境下,如靜態(tài)核穩(wěn)定燃燒階段的核反應都發(fā)生較低的能區(qū),其伽莫夫窗口內的核反應截面非常小,這就需要加速器提供較強束流才能完成核反應截面的直接測量。最近在中國科學院近代物理的320 k V高壓平臺上建立了低能核天體物理實驗室以及相應的研究平臺。驅動該平臺的是一個14.5 GHz的永磁鐵型ECR離子源,它能夠提供非常強的束流離子。對于質子和氦離子,離子源出口的最大流強可以達到100 eμA,在實驗終端上可以獲得大約30 eμA的流強。基于此強流加速器裝置,我們建立了核天體物理實驗測量裝置,包括靶室以及帶電粒子和伽瑪射線探測器等設備。利用已知的核反應對探測器性能和實驗方法進行了一系列測試。同時,展示了近年來取得的一些主要實驗結果。最后,對該平臺上開展工作的前景進行了展望,并指出基于該地面裝置的低能核反應研究所積累的技術及經(jīng)驗對于我國錦屏深地核天體物理JUNA項目的重要意義。
[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.
【作者單位】： 中國科學院國家天文臺;中國科學院近代物理研究所;中國科學院大學;
【基金】：National Natural Science Foundation of China(11675229,11490562) National Key Research and Development Plan(2016YFA0400503)~~
【分類號】：P142
，
本文編號：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.
【作者單位】： 中國科學院國家天文臺;中國科學院近代物理研究所;中國科學院大學;
【基金】：National Natural Science Foundation of China(11675229,11490562) National Key Research and Development Plan(2016YFA0400503)~~
【分類號】：P142
，
本文編號：2496776
本文鏈接：http://sikaile.net/kejilunwen/tianwen/2496776.html
教材專著
