“荧光-1”实验装置物理设计

摘要

本文主要介绍“荧光-1”实验装置物理参数设计,并依据半经验公式预估在实验装置上可能达到的磁化等离子体状态参数.理论设计结果表明：“荧光-1”实验装置最大放电电流1.5 MA,四分之一周期3µs,最大反向磁场4 T；以此为实验平台,当θ箍缩线圈内充气压力50 mTorr(D2气体)时,形成的等离子体靶直径约为2 cm,长度17 cm；等离子体靶密度6.6×1016 cm−3,温度(Ti+Te )约300 eV；等离子体平均β值为0.95.该状态参数接近磁化靶聚变所要求的等离子体靶初始状态参数.%“Ying-Guang 1” is a multi-bank pulsed power device for investigating the formation, confinement and instability of the high temperature and high density field-reversed configuration (FRC) plasma injector for the magnetized target fusion (MTF). This paper described the physical design of the“Ying-Guang 1”device which will be constructed in 2013 at the Institute of Fluid Physics, CAEP. Theoretical results show that the peak reversed current and magnetic field of this device are 1.5 MA and 4 T respectively with the rise time of 3 µs. Based on the semi-empirical formula developed by Tuszewski the magnetized plasma of equilibrium density 6.6×1016 cm−3 and temperature (Ti+Te)∼300 eV could be achieved on the“Ying-Guang 1”device when the initially filled D2 gas pressure is about 50 mTorr, and the length of the FRC separatrix is 17 cm with a radius of 2 cm. The average ratio of the thermal pressure to magnetic pressureβ is about 0.95, and the magnetic field embedded in plasma is 0.5 T. From the adiabatic compression scaling laws and the corresponding ignition conditions, the formated FRC plasma target of the“Ying-Guang 1”device approaches the necessity of the MTF if the radius compression ratio of the solid metal liner were set to 10.