Speaker
Description
The Jinping Underground experiment for Nuclear Astrophysics (JUNA) is located in the ultra-low background of the China Jingping Underground Laboratory (CJPL). JUNA is aiming to conduct experiments for directly studying crucial reactions at stellar energies in the evolution of stars. In 2020, JUNA commissioned an mA level high current accelerator based on an ECR source, as well as high efficiency BGO and 3He detectors. These combination enabled JUNA to perform direct measurements of key nuclear reactions in 10-13 b sensitivity with the beam exposure of few hundreds of Coulomb, including Run 1 experiments of 25Mg(p,γ)26Al, 19F(p,αγ)16O, 19F(p,γ)20Ne, 13C(α,n)16O, 12C(α,γ)16O, and 18O(α,γ)20Ne with improved precision and closer to the Gamow window. These precise reaction rates provide valuable insights into the high precision astrophysics simulation. The highlight, upgrades and Run 2 plans of JUNA experiments will be presented. The progress of other underground nuclear astrophysics experiments such as LUNA, CASPAR and Felsenkeller, will be reviewed.
