Formation and heating dynamics of high-density core plasma in asymmetric implosion

非对称内爆中高密度核心等离子体的形成和加热动力学

• 批准号: 15360490
• 负责人: SHIRAGA Hiroyuki
• 金额: $ 9.79万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2005
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15360490/
• 关键词: laser fusion; fast ignition; cone-shell target; asymmetric implosion; core dynamics; ultra-fast x-ray imaging; fusion products diagnostics; multi-image x-ray streak camera; コアタイナミクス; 核反応粒子

The Institute of Laser Engineering, Osaka University is promoting a project to show scientific feasibility of Fast Ignition laser fusion by using shell target with cone. Implosion with such cone becomes asymmetric with mode-number of 1. Purpose of this research is to investigate formation and heating dynamics of asymmetric implosion. Results are as follows.・ Ultra-fast x-ray imaging technique such as Multi-Imaging X-ray-Streak Camera and 2-Dimensional Sampling Image X-ray Streak Camera were developed and improved to enable to observe rapidly changing asymmetrically imploded core plasma.・ It was found that in asymmetric implosion of shell with cone a jet flow is formed prier to the formation of the imploded core and traverses toward the tip of the cone.・ 2D-simulation code was developed and well reproduced such asymmetric core and jet formation.・ Multi-channel neutron detector system was developed. Parameters of asymmetric core were measured by observing the primary and the secondary fusion reactions.・ Fusion-produced protons were measured with nuclear track detector CR-39.・ Fundamental study of hydrodynamics and heating of cryogenic deuterium target was started. Acceleration and transport was investigated and well reproduced with simulation code.

大阪大学激光工程研究所正在推进一个项目，通过使用带锥体的壳靶来展示快速点火激光聚变的科学可行性。这种锥体的内爆变得不对称，模数为 1。本研究的目的是研究不对称内爆的形成和加热动力学。结果如下。 ・ 开发并改进了多成像 X 射线条纹相机和二维采样图像 X 射线条纹相机等超快速 X 射线成像技术，以能够观察快速变化的非对称内爆核心等离子体。 ・ 发现在带锥体的壳的不对称内爆中，在内爆核心形成之前会形成射流，并横穿到内爆核心。 ・ 开发了二维模拟代码，并很好地再现了这种不对称的核心和射流形成。 ・ 开发了多通道中子探测器系统。通过观察一次和二次聚变反应来测量不对称核心的参数。 ・ 用核径迹探测器 CR-39 测量聚变产生的质子。 ・ 开始了低温氘靶的流体动力学和加热的基础研究。对加速和传输进行了研究并用模拟代码很好地再现了。

项目成果

Suppression of Rayleigh–Taylor instability due to radiative ablation in brominated plastic targets

• DOI: 10.1063/1.1705654
• 发表时间: 2004-04
• 期刊: Physics of Plasmas
• 影响因子: 2.2
• 作者: S. Fujioka;A. Sunahara;N. Ohnishi;Y. Tamari;K. Nishihara;H. Azechi;H. Shiraga;M. Nakai;K. Shigemori;T. Sakaiya;Motohiro Tanaka;K. Otani;Kazuki Okuno;T. Watari;Takeshi Yamada;M. Murakami;K. Nagai;T. Norimatsu;Y. Izawa;S. Nozaki;Yen-Wei Chen

Numerical Simulation of Non-spherical Implosion Related to East Ignition

东点火相关非球形内爆的数值模拟

• 发表时间: 2003
• 期刊: Journal of Plasma Physics Vol.669
• 作者: H.Nagatomo;他
• 通讯作者: 他

Foam materials for cryogenic targets of fast ignition realization experiment (FIREX)

快速点火实现实验（FIREX）低温靶用泡沫材料

• 发表时间: 2005
• 期刊: Nucl. Fusion Vol. 45
• 作者: Keiji Nagai;H. Azechi;F. Ito;A. Iwamoto;Y. Izawa;T. Johzaki;R. Kodama;K. Mima;T. Mito;M. Nakai;N. Nemoto;T. Norimatsu;Y. Ono;K. Shigemori;H. Shiraga and K. A. Tanaka
• 通讯作者: H. Shiraga and K. A. Tanaka

爆縮シミュレーション

内爆模拟

• 发表时间: 2005
• 期刊: J.Plasma Fusion Res. 81・Suppl.
• 作者: 長友 英;他
• 通讯作者: 他

レーザープラズマの時空同時分解分光画像計測 - 画像サンプリングを用いたレーザープラズマの高時間空間分解画像計測

激光等离子体的同步时空分辨光谱图像测量 - 使用图像采样对激光等离子体进行高度时空分辨图像测量

• 发表时间: 2003
• 期刊: プラズマ・核融合学会誌
• 作者: H.Nagatomo;他;白神 宏之
• 通讯作者: 白神 宏之