A high power beam-on-target test of liquid lithium target for RIA.
A high power beam-on-target test of liquid lithium target for RIA.
复制标题
用于 RIA 的液态锂靶的高功率束对靶测试。
DOI：
10.2172/861618
复制
发表时间：
2005
期刊：
影响因子：
--
通讯作者：
I. Gomes
中科院分区：
文献类型：
--
作者：
J. Nolen;C. Reed;V. Novick;J. Specht;P. Plotkin;Y. Momozaki;I. Gomes
进行的实验旨在证明无窗液态锂靶在极端热负载下的稳定运行，这些热负载相当于来自拟议的稀有同位素加速器（RIA）驱动器直线加速器的铀束。首先讨论了液态锂系统的工程和安全问题。主要为快堆和液态金属冷却聚变反应堆生成的液态金属技术知识库被应用于核物理实验室环境中这些系统的开发。还描述了使用高能电子束来模拟由 RIA 驱动器直线加速器产生的高功率铀束。进行计算以获得由高达几 MeV 的电子束产生的能量沉积分布，以与预期的铀束能量沉积分布进行比较。结论是，使用 1-MeV 电子束进行实验模拟将是评估束射流相互作用的重要工具。实验中，无窗液态锂靶材的横截面为5 mm x 10 mm，为1/3比例的原型靶材，液态锂的速度变化最大为6 m/s。通过 1 MeV 电子束在无窗液态锂靶上施加高达 20 kW 的束斑直径 1 mm 的热负载。计算表明，电子束沉积在靶内的最大功率密度和总功率相当于 200 kW、400 MeV/u 铀束。事实证明，无窗液态锂靶材以低至 1.8 m/s 的速度流动，在高达 20 kW 的光束功率下稳定运行，不会出现中断或过度汽化。
Experiments were conducted to demonstrate the stable operation of a windowless liquid lithium target under extreme thermal loads that are equivalent to uranium beams from the proposed Rare Isotope Accelerator (RIA) driver linac. The engineering and safety issues accompanying liquid lithium systems are first discussed. The liquid metal technology knowledge base generated primarily for fast reactors, and liquid metal cooled fusion reactors, was applied to the development of these systems in a nuclear physics laboratory setting. The use of a high energy electron beam for simulating a high power uranium beam produced by the RIA driver linac is also described. Calculations were performed to obtain energy deposition profiles produced by electron beams at up to a few MeV to compare with expected uranium beam energy deposition profiles. It was concluded that an experimental simulation using a 1-MeV electron beam would be a valuable tool to assess beam-jet interaction. In the experiments, the cross section of the windowless liquid lithium target was 5 mm x 10 mm, which is a 1/3rd scale prototype target, and the velocity of the liquid lithium was varied up to 6 m/s. Thermal loads up to 20 kW within a beam spot diameter of 1mm were applied on the windowless liquid lithium target by the 1-MeV electron beam. The calculations showed that the maximum power density and total power deposited within the target, from the electron beam, was equivalent to that of a 200-kW, 400-MeV/u uranium beam. It was demonstrated that the windowless liquid lithium target flowing at velocities as low as 1.8 m/s stably operated under beam powers up to 20 kW without disruption or excessive vaporization.