The National Ignition Facility: Transition to a User Facility
The National Ignition Facility: Transition to a User Facility
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国家点火设施：过渡到用户设施
DOI：
10.1088/1742-6596/688/1/012073
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发表时间：
2016
期刊：
影响因子：
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通讯作者：
R. Kauffman
中科院分区：
文献类型：
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作者：
E. Moses;J. Atherton;L. Lagin;D. Larson;C. Keane;B. MacGowan;R. Patterson;M. Spaeth;B. V. Van Wonterghem;P. Wegner;R. Kauffman
劳伦斯利弗莫尔国家实验室 (LLNL) 的国家点火设施 (NIF) 自 2009 年 3 月开始运营，并已转变为支持点火科学、高能量密度科学 (HEDS)、国家安全应用和基础科学的用户设施。该设施实现了 1.8 MJ 和 500 TW 3ω 光对靶的设计目标，并以 1.9 MJ、峰值功率 410 TW 进行了靶实验。该设施今年有望进行 200 多次目标射击，以支持其所有用户社区。该设施拥有近 60 个正在运行的诊断系统，并在激光脉冲形状和性能方面表现出灵活性，可以满足多个用户的要求。在实验室演示热核燃烧的目标仍在继续取得进展。它已使用低温层状胶囊进行了 40 多项间接驱动实验。正在为 HEDS 和基础科学开发新平台。在金刚石中获得的压力超过 50 MBar 的多种材料上进行了状态方程和材料强度实验，这些条件以前在实验室中从未遇到过，并且与行星内部发现的条件相似。研究辐射传输、流体动力学不稳定性和直接驱动内爆的实验也在进行中。 NIF 作为实验设施继续发展。 NIF 现已安装先进射线照相功能 (ARC)，用于生成点火目标内爆核心的高能射线照片，并进行短脉冲激光-等离子体相互作用实验。计划在 2014 年将一根 NIF 光束转换为两束皮秒光束。还计划使用其他新的诊断技术，例如 X 射线汤姆逊散射、低能中子能谱仪和多层反射 X 射线光学器件。人们正在寻求激光性能的逐步改进，例如改进光学损伤性能、光束平衡和背反射控制。
The National Ignition Facility (NIF) at Lawrence Livermore National Laboratory (LLNL) has been operational since March 2009 and has been transitioning to a user facility supporting ignition science, high energy density science (HEDS), national security applications, and fundamental science. The facility has achieved its design goal of 1.8 MJ and 500 TW of 3ω light on target, and has performed target experiments with 1.9 MJ at peak powers of 410 TW. The facility is on track to perform over 200 target shots this year in support of all of its user communities. The facility has nearly 60 diagnostic systems operational and has shown flexibility in laser pulse shape and performance to meet the requirements of its multiple users. Progress continues on its goal of demonstrating thermonuclear burn in the laboratory. It has performed over 40 indirect-drive experiments with cryogenic-layered capsules. New platforms are being developed for HEDS and fundamental science. Equation-of-state and material strength experiments have been done on a number of materials with pressures of over 50 MBars obtained in diamond, conditions never previously encountered in the laboratory and similar to those found in planetary interiors. Experiments are also in progress investigating radiation transport, hydrodynamic instabilities, and direct drive implosions. NIF continues to develop as an experimental facility. Advanced Radiographic Capability (ARC) is now being installed on NIF for producing high-energy radiographs of the imploded cores of ignition targets and for short pulse laser-plasma interaction experiments. One NIF beam is planned for conversion to two picosecond beams in 2014. Other new diagnostics such as x-ray Thomson scattering, low energy neutron spectrometer, and multi-layer reflecting x-ray optics are also planned. Incremental improvements in laser performance such as improved optics damage performance, beam balance, and back reflection control are being pursued.