{"id":"doi:10.1038/s41467-019-13574-8","kind":"article","title":"Direct observation of imploded core heating via fast electrons with super-penetration scheme","authors":["Tao Gong","H. Habara","K. Sumioka","M. Yoshimoto","Y. Hayashi","S. Kawazu","T. Otsuki","Toshikazu Matsumoto","Takumi Minami","K. Abe","K. Aizawa","Yuya Enmei","Yasuhiko Fujita","A. Ikegami","Hiroki Makiyama","K. Okazaki","Keiji Okida","T. Tsukamoto","Yasunobu Arikawa","Shinsuke Fujioka","Y. Iwasa","Seungho Lee","Hideo Nagatomo","H. Shiraga","Kohei Yamanoi"],"author_count":27,"year":2019,"published":"2019-12-09","venue":"Nature Communications","cited_by":199,"doi":"10.1038/s41467-019-13574-8","arxiv_id":null,"nct_id":null,"source_url":"https://doi.org/10.1038/s41467-019-13574-8","archive_url":"https://space-kitty.com/papers/doi:10.1038/s41467-019-13574-8","updated":null,"pmid":"31819056","pmcid":null,"openalex_id":"W2993372100","pdf_url":"https://www.nature.com/articles/s41467-019-13574-8.pdf","abstract":"Fast ignition (FI) is a promising approach for high-energy-gain inertial confinement fusion in the laboratory. To achieve ignition, the energy of a short-pulse laser is required to be delivered efficiently to the pre-compressed fuel core via a high-energy electron beam. Therefore, understanding the transport and energy deposition of this electron beam inside the pre-compressed core is the key for FI. Here we report on the direct observation of the electron beam transport and deposition in a compressed core through the stimulated Cu Kα emission in the super-penetration scheme. Simulations reproducing the experimental measurements indicate that, at the time of peak compression, about 1% of the short-pulse energy is coupled to a relatively low-density core with a radius of 70 μm. Analysis with the support of 2D particle-in-cell simulations uncovers the key factors improving this coupling efficiency. Our findings are of critical importance for optimizing FI experiments in a super-penetration scheme.","abstract_license":"CC-BY (publisher license, via OpenAlex)","license":"cc-by","is_open_access":true,"retracted":false,"peer_reviewed":null,"categories":["Laser-Plasma Interactions and Diagnostics"],"details":null,"provenance":"openalex","attribution":"Abstract of \"Direct observation of imploded core heating via fast electrons with super-penetration scheme\" by Tao Gong, H. Habara, K. Sumioka et al., https://doi.org/10.1038/s41467-019-13574-8, used under its Creative Commons Attribution license (CC-BY); markup removed, otherwise unmodified.","topics":[{"slug":"inertial-fusion","name":"Inertial Confinement Fusion","domain_slug":"energy"}],"cited_in_dossiers":[]}