Collisionless shock generation using large-scale laser systems

2014 Fiscal Year Final Research Report

• Project/Area Number: 24340141
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Plasma science
• Research Institution: Osaka University
• Principal Investigator: SAKAWA Youichi 大阪大学, レーザーエネルギー学研究センタ, 准教授 (70242881)
• Co-Investigator(Kenkyū-buntansha): YONEDA Hitoki 電気通信大学, レーザー新世代研究センター, 教授 (00210790) ; TAKABE Hideaki 大阪大学, レーザーエネルギー学研究センター, 教授 (20150352) ; MORITAKA Toseo 大阪大学, レーザーエネルギー学研究センター, 研究員 (20554372) ; TOMITA Kentaro 九州大学, 総合理工学研究科(研究院), 助教 (70452729) ; MORITA Taichi 九州大学, 総合理工学研究科(研究院), 助教 (30726401)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 無衝突衝撃波 / 大型レーザー / ワイベル不安定性 / 強磁場実験 / 協同トムソン散乱

Outline of Final Research Achievements

Collisionless shock experiments were conducted using supersonic counter-stream plasmas with parallel double-plane (DP) target. On Gekko XII HIPER laser experiment, collective Thomson scattering ion-term measurement was conducted. Electron and ion temperatures, flow velocity, electron density were measured for counter-streaming plasmas and shock, and their temporal-evolution was investigated.
On OMEGA laser (USA) experiment, Weibel filaments were observed by D-3He fusion produced proton radiography.
On the NIF laser (USA) experiment, DD neutrons/proton and strong x-ray emission from the hot plasmas in the middle of the two planes are observed with CD DP target. These results indicate that neutrons are produced in a shock-heated hot plasma.

Free Research Field

プラズマ物理学