Research on high energy density plasmas produced by peta watt laser

拍瓦激光器产生高能量密度等离子体的研究

• 批准号: 15GS0214
• 负责人: MIMA Kunioki
• 金额: $ 204.84万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Creative Scientific Research
• 财政年份: 2003
• 资助国家: 日本
• 起止时间: 2003 至 2007
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-15GS0214/
• 关键词: Fast Ignition; Relativistic Laser Plasma; Laser Particle Acceleration; High Energy Electron; Particle Simulation; Fokker Planck Simulation; radiation hydrodynamics; OPCPA; フォッカーブランクシミュレーション; 超高強度レーザー

In 2003, we started this project to create a new field in the research of peta watt laser plasmas within five years. As for the experiments, since the new OPCPA front end was introduced to reduce the pre-pulse level from 10^<-4> to 10^<-8>, the improved GMII has been applied to the proton acceleration. By using a thin foil target, we achieved the acceleration of up to about 20MeV. We also irradiated solid planer targets to measure the relativistic electron spectrum of which slope temperature without pre-pulse is lower than that with pre-pulse. By this achievement, we can carry out well controlled experiments and analyze experimental data precisely with theory and simulation.In the theory and simulation research, we combined a radiation hydrodynamic simulation with the hydro code PINOCO, a collective PIC simulation, and a Fokker Planck simulation to simulate the fast plasma heating for laser fusion and neutron source researches. As the target design for the fast ignition experiments wit … More h of FI3, we simulated the imploded plasma heating processes for the cone target experiment. In particular, the double cone target was introduced to improve the relativistic electron confinement in the cone and guiding them to he tip of the cone. The PIC simulation indicated that the strong magnetic fields in the vacuum gap are generated which confine relativistic electrons for a long time. As the results, the coupling efficiency is enhanced by 1.5 time. We also investigated the pre-plasma effects on the high energy electron transport. It is found that when the scale length of the pre-plasma exceeds a few μm, the electron slope temperature is too hig for the efficient plasma heating. In order to overcome this difficulty, we investigated the plasma production processes by the pre-pulse. According to the simulations, prepulse intensity is required to be lower than 10^<11>W/cm^2.In conclusion, after 5 year project, the integrated simulation code was developed and validated. The simulation research contributed to the experiment design and analysis. In the experiment, the GMII short pulse ultra intense laser was improved and applied to the proton and electron beam acceleration experiments. The self-generated magnetic field s and the relativistic electron guiding have been clarified. Less

2003年，我们启动了这个项目，目标是在五年内开创拍瓦激光等离子体研究的新领域。实验方面，由于引入了新的OPCPA前端，将预脉冲水平从10^<-4>降低到10^<-8>，改进的GMII已应用于质子加速。通过使用薄箔靶，我们实现了高达约 20MeV 的加速度。我们还对固体平面靶进行了辐照，测量了相对论电子能谱，其斜率温度在没有预脉冲的情况下比有预脉冲的要低。通过这一成果，我们可以很好地进行受控实验，并通过理论和仿真对实验数据进行精确分析。在理论和仿真研究中，我们将辐射流体动力学仿真与水文代码PINOCO、集体PIC仿真和Fokker Planck仿真相结合，模拟快速等离子体加热，用于激光聚变和中子源研究。作为使用 FI3 的快速点火实验的靶设计，我们模拟了锥形靶实验的内爆等离子体加热过程。特别是，引入双锥靶以改善锥体中的相对论电子限制并将它们引导至锥体尖端。 PIC模拟表明，真空间隙中产生强磁场，长期束缚相对论性电子。结果，耦合效率提高了1.5倍。我们还研究了前等离子体对高能电子传输的影响。研究发现，当预等离子体的尺度长度超过几μm时，电子斜率温度对于等离子体的有效加热来说太高。为了克服这个困难，我们研究了预脉冲等离子体的产生过程。根据模拟结果，预脉冲强度要求低于10^<11>W/cm^2。总之，经过5年的项目，开发并验证了集成的模拟代码。仿真研究有助于实验设计和分析。实验中对GMII短脉冲超强激光器进行了改进并应用于质子和电子束加速实验。自生磁场 s 和相对论电子引导已经阐明。较少的

项目成果

X-ray polarization spectroscopy to study energy transport in ultra-high intensity laser produced plasmas

• DOI: 10.1088/1742-6596/112/2/022080
• 发表时间: 2008-05
• 作者: H. Nishimura;Y. Inubushi;Y. Okano;S. Fujioka;T. Kai;T. Kawamura;D. Batani;A. Morace;R. Redaelli;C. Fourment;J. Santos;G. Malka;A. Boscheron;A. Casner;M. Koenig;Tatsufumi Nakamura;T. Johzaki;H. Nagatomo;K. Mima

Optimization of Non-spherical Implosion for Fast Ignition

快速点火非球形内爆优化

• 发表时间: 2007
• 作者: Nagatomo;H.;Johzaki;T.;Sunahara;A.;Sakagami;H.;K. Mima;他2名
• 通讯作者: 他2名

Simulation and design study of cryogenic cone shell target for fast ignition FIREX project

快点火FIREX项目低温锥壳靶仿真与设计研究

• 发表时间: 2007
• 期刊: Physics of Plasmas 14
• 作者: Nagatomo;H.;Johzaki;T.;Nakamura;T.;Sakagami;H.;Sunahara;A.;Mima;K.
• 通讯作者: K.

Magnetic-dipole vortex generation by propagation of ultraintense and ultrashort laser pulses in moderate-density plasmas

• DOI: 10.1103/physrevlett.100.205006
• 发表时间: 2008-05-23
• 期刊: PHYSICAL REVIEW LETTERS
• 影响因子: 8.6
• 作者: Nakamura, Tatsufumi;Mima, Kunioki
• 通讯作者: Mima, Kunioki

Skinning of argon clusters by Coulomdb explosion induced with an intense femtosecond laser pulse

强飞秒激光脉冲引起的库仑db爆炸对氩簇的结皮

• 发表时间: 2006
• 期刊: PHYSICAL REVIEW A 74
• 作者: S.Sakabe;K.Shirai;M.Hashida;S.Shimizu;S.Masuno
• 通讯作者: S.Masuno