Iliasova M V, Shevelev A E, Khilkevitch E M, Lebedev S V, Askinazi L G, Kornev V A, Minaev V B, Tukachinsky A S, Doinikov D N, Polunovsky I A, Naidenov V O, Gin D B
Ioffe Institute, St Petersburg 194021, Russian Federation.
Rev Sci Instrum. 2021 Apr 1;92(4):043560. doi: 10.1063/5.0040667.
A compact neutron spectrometer based on the BC-501A liquid organic scintillator was applied to neutron measurements at the TUMAN-3M tokamak. The spectrometer was calibrated using measurements from the ion beam of the cyclotron accelerator. Neutron spectra were measured during discharges using a neutral deuterium beam injection into the TUMAN-3M D-plasma. An energy distribution of the neutrons from the plasma that hit the spectrometer was obtained from the measured BC-501A instrumental spectra by the DeGaSum code using detector response functions obtained in the course of the calibration. This allowed for the estimation of the 2.45 MeV neutron yield and the evaluation of both the time evolution of the DD fusion rate and the characteristic time of the injected deuterium slowing down in discharges with neutral beam injection heating.
一种基于BC-501A液体有机闪烁体的紧凑型中子谱仪被应用于TUMAN-3M托卡马克装置的中子测量。该谱仪通过回旋加速器离子束的测量进行校准。在放电过程中，利用向TUMAN-3M D等离子体注入中性氘束来测量中子能谱。通过DeGaSum程序，利用校准过程中获得的探测器响应函数，从测量的BC-501A仪器能谱中得到撞击谱仪的等离子体中子的能量分布。这使得能够估计2.45 MeV中子产额，并评估在中性束注入加热的放电中DD聚变率的时间演化以及注入氘减速的特征时间。
