Research progress of fabrication techniques for laser inertial confinement fusion target
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摘要: 在实验室实现聚变反应释放的能量大于点燃聚变反应所需能量的阈值是当今世界ICF研究的主要目标，实现这一目标仍需要深入研究一系列的关键物理问题。在ICF研究中，制靶能力的发展与提升至关重要，靶的质量是实验成功的核心要素之一。本文介绍了国际ICF靶制备工作近年来在新型烧蚀层材料靶丸、新型靶丸支撑技术、优化黑腔材料与构型以及减小燃料填充管直径等方面取得的一系列进展，并结合ICF物理需求，简要阐述了ICF靶的发展趋势。Abstract: The main goal of inertial confinement fusion (ICF) research is to realize that the energy released by fusion reaction is greater than the threshold value of ignition fusion reaction in the laboratory. A series of key physical problems must be explored deeply for the purpose. In ICF, the capability of target fabrication is particularly important, and the quality of target is the pivotal element of physical experiment. This paper expounds the progress of ICF target preparation in recent years, such as capsule of new ablation material, new technology of capsule support, new material and shape of hohlraums, and reduction of filler tube dimensions. Combining with the physical requirements of ICF, it introduces the development trend of ICF target briefly.
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Key words:
- laser inertial confinement fusion /
- target /
- fabrication /
- progress /
- development
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图 2 美国国家点火装置采用的靶型爆炸图
Figure 2. Expanded view of the National Ignition Facility（NIF） target
图 11 磁悬浮靶丸示意图
Figure 11. Schematics of the superconducting magnetic levitation to support capsule
图 13 Ta2O5气凝胶内衬的黑腔样品加工与装配过程
Figure 13. Progression of the steps for machining a Ta2O5 foam liner
（a）preparatory machining of foam into a cylindrical billet with the starting hole in the center on a lathe；（b）potting of the hohlraum onto a post using a removable adhesive；（c）aligning the billet machined in（a） to the potted hohlraum；（d）partial insertion of the billet into the hohlraum；（e）side view of the cutting of the foam billet using a spinning wire；（f）separation of the billet from its holder upon completion of the cutting；（g）side of the foam in the hohlraum ready for further insertion；（h）top view of the billet flush with the hohlraum waist；（i）customized pusher readying for insertion of the billet to the right location within the hohlraum；（j）billet in its final resting place inside the hohlraum； （k）milling of the inner wall of the billet to achieve the right liner thickness；（l）final part.
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