第656回レーザー科学研究所コロキウム

第656回レーザー科学研究所コロキウム

●日時(Date):
2024年5月29日 13時00分～14時00分

○場所(Place):
レーザー科学研究所 研究棟4F 大ホール

ハイブリッド開催ですので、Zoomからでもご参加いただけます。
オンラインでの接続先：
https://us02web.zoom.us/j/84028044346?pwd=Nk9PSzBpTzVvVWtkMmhOa3k5T2MyZz09
ミーティング ID: 840 2804 4346
パスコード: 858104

●講演者(Speaker):
Drew P. Higginson,
Plasma Physicist, Lawrence Livermore National Laboratory
Guest Associate Professor, Institute of Laser Engineering, Osaka University

○題目(Title):
Fast ignition research and goals at Lawrence Livermore National Laboratory

●概要(Abstract):
On Dec. 5, 2022, the National Ignition Facility (NIF) at Lawrence Livermore National Laboratory (LLNL) achieved the historic milestone of “fusion ignition” in an inertial confinement fusion (ICF) experiment. This exciting result gives new urgency for Inertial Fusion Energy (IFE) and has reinvigorated alternative ICF schemes that have the potential for the higher gains. One such scheme is fast ignition (FI). FI is a two-step process that uses nanosecond lasers to compress an ICF capsule, then uses picosecond, short-pulse (SP) lasers to accelerate particles (i.e., electrons, ions) that heat the core to fusion temperatures. This separation of stages allows for higher gain and reduced symmetry constraints.
To understand the feasibility of FI, we estimate the SP laser energy required for fast ignition considering both SP-accelerated electrons and ions. This is done by evaluating the current state-of-the-art conversion efficiencies, such as laser-to-particle, transport, energy-spectra and focusing efficiencies. These values point to critical issues that must be solved for the success of FI. LLNL has recently begun a Strategic Initiative that will work to resolve these issues through dedicated experiments and simulations. We will describe the experimental work planned and supporting simulations.

○連絡先(Contact Person):
岩田夏弥
iwata.natsumi.ile@osaka-u.ac.jp