Nocente M, Molin A Dal, Rigamonti D, Rosa M Dalla, Fernández B, Fugazza S, Guerrero C, Gorini G, Kazakov Y, Tardini G, Tardocchi M
Department of Physics, University of Milano-Bicocca, 20126 Milan, Italy.
Institute for Plasma Science and Technology, National Research Council, 20125 Milan, Italy.
Rev Sci Instrum. 2024 Aug 1;95(8). doi: 10.1063/5.0218178.
A COmpact Spectrometer for Measurements Of Neutrons at the ASDEX Upgrade Tokamak (COSMONAUT) has been developed for spectroscopy measurements of the 2.45 MeV neutron emission from deuterium plasmas at the ASDEX Upgrade. The instrument is based on a CLYC-7 inorganic scintillator, whereby the detection of fusion neutrons occurs via their interaction with 35Cl nuclei in the detector crystal, leading to a peak in the detector response function and providing excellent neutron/gamma-ray discrimination capabilities. The diagnostics is installed along a radial line of sight and makes use of a digital system to record time resolved data for the whole duration of the discharge. Measurements in ASDEX Upgrade plasmas with neutral beam injection have been carried out and are successfully interpreted using state-of-the-art modeling codes. Next step applications of the diagnostics are in experiments aimed at generating energetic particles by ion cyclotron resonance heating schemes. In these scenarios, COSMONAUT will provide unique information on the acceleration of deuterons beyond the beam injection energy and on their confinement, for comparison with modeling.
已开发出一种紧凑型光谱仪，用于在ASDEX升级托卡马克装置上测量中子（COSMONAUT），以对ASDEX升级装置中氘等离子体发射的2.45兆电子伏特中子进行光谱测量。该仪器基于CLYC - 7无机闪烁体，通过探测器晶体中35Cl原子核与聚变中子的相互作用来探测中子，从而在探测器响应函数中形成一个峰值，并具备出色的中子/伽马射线鉴别能力。该诊断设备沿径向视线安装，并利用数字系统记录放电全过程的时间分辨数据。已在ASDEX升级装置的中性束注入等离子体中进行了测量，并使用先进的建模代码成功进行了解释。该诊断设备的下一步应用将用于旨在通过离子回旋共振加热方案产生高能粒子的实验。在这些情况下，COSMONAUT将提供有关氘核在束注入能量之上的加速及其约束的独特信息，以便与建模结果进行比较。
