Evaluation of transient plasma phenomenon by the fast Thomson scattering measurement

2016 Fiscal Year Final Research Report

• Project/Area Number: 26709072
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Partial Multi-year Fund
• Research Field: Nuclear fusion studies
• Research Institution: National Institute for Fusion Science
• Principal Investigator: Yasuhara Ryo 核融合科学研究所, ヘリカル研究部, 助教 (30394290)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 高出力レーザー / バーストレーザー / 過渡的プラズマ現象 / トムソン散乱計測 / 高時間分解能

Outline of Final Research Achievements

We investigated the fast laser Thomson scattering system to measure the the electron temperature and electron density profiles of the transient plasma less than milliseconds by the multi-laser system and the burst laser. We succeeded in observing the transient plasma phenomenon at the hydrogen pellet ablation which have less than 1 millisecond by the multi laser system. The time resolution of Thomson scattering measurement was improved from the current 10 ms order to less than 1 ms. For the further improvement of the temporal resolution, a fundamental study of the laser operating in the burst mode was carried out, and laser output of Joule class energy was confirmed. In the future, we will improve the fast-Thomson scattering system higher performance by the conducting international collaborative research, .

Free Research Field

レーザー工学、プラズマ計測