Fusion fuel ion temperature diagnostic for directly driven implosions

作者：J.-B. Chen, Zhen Zheng, H. S. Peng, B. H. Zhang, Yongkun Ding, Menglu CHEN, H. S. Chen, T. S. Wen · 发表于：Review of Scientific Instruments · 年份：2001 · DOI：10.1063/1.1396665 · 被引用次数：13 · 研究领域：Laser-Plasma Interactions and Diagnostics、Nuclear Physics and Applications、Nuclear reactor physics and engineering

An ultrafast quenched plastic scintillation detector was used to measure the fusion fuel ion temperature at low implosion (DT) neutron yield (5×108–3×109) in the initial experiment performed at the Shenguang II laser facility. The typical temperatures of exploding pusher targets for direct drive were around 4 keV and the uncertainties were ±15–23%. The detection efficiency of the detector to DT neutrons was calibrated at a K-400 accelerator. The time response function of the detection system was calibrated by implosion neutrons from a DT-filled capsule, which can be regarded as a δ function pulsed neutron source due to its much narrower pulse width than that of the measured neutron time-of-flight spectrum.