Development of Ablation-cooled Metal-liquid Target for Real-time X-ray Imaging

2022 Fiscal Year Final Research Report

• Project/Area Number: 21K20361
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Multi-year Fund
• Review Section: 0202:Condensed matter physics, plasma science, nuclear engineering, earth resources engineering, energy engineering, and related fields
• Research Institution: National Institute of Advanced Industrial Science and Technology
• Principal Investigator: Tatsunori Shibuya 国立研究開発法人産業技術総合研究所, 計量標準総合センター, 研究員 (50874525)
• Project Period (FY): 2021-08-30 – 2023-03-31
• Keywords: X線 / 標的 / ビーム物理 / レーザー / レーザー加工

Outline of Final Research Achievements

A new type X-ray target combining with ultrafast electron pulse and dynamical liquid metal changing was proposed. This scheme utilizes the bremsstrahlung of X-rays faster than heat conduction by colliding ultrafast electron pulses generated by the photoemission and the high-speed liquid-flowing. For the experiment, the electron gun and the liquid metal flow system was developed and confirmed their fine operation. In addition, the shot repetition rate, which determines the average power of emitted X-rays, was evaluated.

Free Research Field

量子ビーム科学

Academic Significance and Societal Importance of the Research Achievements

提案したX線発生法は、原理的に放出できるX線出力に制限がなく、また、フェムト秒からナノ秒までの時間分解能を達成することが期待される。これにより、卓上白色X線源の更なる高高輝度化と高分解能化が可能となり、例えば、エンジンやモーターなどの産業アセンブリ品の動作中イメージングなどが可能となる。