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The progress about measurements of the proton beam characteristics of the JUNA 400 kV accelerator

机译：Juna 400 kV加速器质子梁特性测量的进展

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China JinPing underground Laboratory (CJPL) was established inside the tunnels piercing Jinping Mountain in Sichuan Province, China, which can provide an ideal environment for low background experiment. Jinping Underground laboratory for Nuclear Astrophysics (JUNA) is one of the major research programs in CJPL. A new 400 kV accelerator, with high current based on an ECR source, will be installed into CJPL for the study of key nuclear reactions in astrophysics. The beam characteristics of the accelerator, like absolute energy, energy spread, and long-term energy stability, will be determined by several well-known resonance and non-resonance reactions. Due to the new accelerator still being under construction, the resonance reaction of ~(27)Al(p, γ)~(28)Siand non-resonance ~(12)C(p, y)~(13)N were studied at the 320kVhigh-voltage platform of Institute of Modern Physics in Lanzhou, China. The energy spread of proton beam is about 1.0 keV and the long-term energy stability of proton beam is better than ±200 eV during 4 hours measurement.
机译：中国锦平地下实验室（CJPL）在中国四川省贯穿晋平山的隧道内部建立，可以为低背景实验提供理想的环境。核天体物理学（JUNA）金平地下实验室是CJPL中的主要研究计划之一。新的400 kV加速器，基于ECR源的高电流，将安装在CJPL中，以研究天体物理学的关键核反应。加速器的光束特性，如绝对能量，能量扩散和长期能量稳定性，将由几种众所周知的共振和非共振反应确定。由于新的加速器仍处于建造，研究了〜（27）的共振反应（P，γ）〜（28）SIAND非共振〜（12）C（P，Y）〜（13）n兰州兰州现代物理研究所320kvhhigh-电压平台。质子梁的能量扩散约为1.0keV，在4小时测量期间，质子束的长期能量稳定性优于±200eV。

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