Investigation of phase transition processes arises from atomic and radiative property of plasmas for EUV and X-ray laser applications

对 EUV 和 X 射线激光应用中等离子体的原子和辐射特性进行相变过程的研究

• 批准号: 23340185
• 负责人: SASAKI Akira
• 金额: $ 11.23万
• 依托单位: Japan Atomic Energy Agency
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 2011
• 资助国家: 日本
• 起止时间: 2011-04-01 至 2014-03-31
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23340185/
• 关键词: プラズマ原子過程; プラズマ分光; パーコレーション; 相転移; 放電; EUV光源; シミュレーション; プラズマ; レーザープラズマ; 輻射流体力学; ストリーマ; 輻射輸送

We investigate the mechanism of formation of the inhomogeneous structure in laser produced plasmas and discharge plasmas, by taking the phase transition processes into account, which originate from atomic and radiative properties of plasmas. We develop a detailed atomic model of tungsten, which is interested in fusion plasmas. The size of the model is parameterized, and accuracy of the calculation of mean charge and radiative power loss is improved by sensitivity studies and benchmark calculations. We also investigate percolation transition in discharge plasmas. We investigate development of discharge in SF6 based on its material properties such as ionization and attachment coefficient to reproduce experimental observations from initial partial discharge to later growth of the stepped leader to cause breakdown. By combining both atomic model, radiative transfer model and phase transition model understanding of structure formation in the plasmas will be improved.

我们通过考虑相变过程来研究激光中不均匀结构的形成机理，从而产生了等离子体和放电等离子体，该过程源自等离子体的原子和辐射特性。我们开发了一种详细的钨原子模型，该模型对融合等离子体感兴趣。该模型的大小是参数化的，通过灵敏度研究和基准计算来改善平均电荷和辐射功率损失的计算准确性。我们还研究了排放等离子的渗透过渡。我们根据其材料特性（例如电离和依恋系数）研究出现在SF6中的发育，以从初始部分放电到后来的阶梯领导者的后来生长，从而导致破裂。通过将原子模型相结合，将改善等离子体中结构形成的辐射转移模型和相变模型的理解。

项目成果

Modeling of laser plasma interaction for the EUV sources

EUV 源的激光等离子体相互作用建模

• 发表时间: 2013
• 作者: A.Sasaki,K.Nishihara,A.Sunahara;H.Furukawa,T.Nishikawa,F.Koike
• 通讯作者: H.Furukawa,T.Nishikawa,F.Koike

Formation mechanism of non-uniform structure in the gain distribution and its effect to the plasma x-ray lasers

增益分布不均匀结构的形成机制及其对等离子体X射线激光器的影响

• DOI: 10.1117/12.894238
• 发表时间: 2011
• 期刊: Proceedings SPIE, X-ray lasers and coherent x-ray sources
• 作者: S. Uchida;B. Behgol;B. Wang;A.Sasaki
• 通讯作者: A.Sasaki

Validation of collisional radiative model of high-z multiple charged ions at NLTE code comparison workshop

在 NLTE 代码比较研讨会上验证高 Z 多带电离子的碰撞辐射模型

• 发表时间: 2013
• 期刊: Plasma Fusion Res
• 影响因子: 0.8
• 作者: A. Sasaki and I. Murakami

Construction of a collisional radiative model of complex multiple

复杂多次波碰撞辐射模型的构建

• DOI: 10.1016/j.hedp.2013.01.009
• 发表时间: 2013
• 期刊: High Energy Density Physics
• 影响因子: 1.6
• 作者: Yamada;F.;A. Sasaki
• 通讯作者: A. Sasaki

Validation of Collisional Radiative Model of High-Z Multiple Charged Ions at NLTE Code Comparison Workshops

NLTE 代码比较研讨会上高 Z 多带电离子碰撞辐射模型的验证

• DOI: 10.1585/pfr.8.2401021
• 发表时间: 2013
• 期刊: Plasma and Fusion Research
• 影响因子: 0.8
• 作者: Fujii;H.;Maehara;T.;Komaniwa;Y.;Chou;N.;Ishikami;T.;A. Sasaki
• 通讯作者: A. Sasaki