2015 Fiscal Year Annual Research Report
A compact coherent x-ray source development using relativistic high-order harmonics from laser-gas jet interactions
| Project/Area Number |
25390135
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| Research Institution | Japan Atomic Energy Agency |
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Principal Investigator |
Esirkepov Timur 国立研究開発法人日本原子力研究開発機構, 原子力科学研究部門 量子ビーム応用研究部門, 研究副主幹 (10370363)
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| Project Period (FY) |
2013-04-01 – 2016-03-31
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| Keywords | 高次高調波発生 / プラズマ / レーザー / 相対論的相互作用 / 相対論的自己集中 / 船首波 / Particle in Cell法 / クラスタサーバ |
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| Outline of Annual Research Achievements |
1. Owing to this grant, I assembled the cluster server Shkaf-2 comprising of 128 processor cores, 1024 Gb of memory, 96 Tb of disk space. Its nominal performance of 2.97 teraflops is 5 times greater than the previous cluster Shkaf built in 2009 using the grant Wakate (B) 21740302 "Bow wave in laser plasma and electron acceleration" (2009-2011). I installed the Linux operational system (Debian), Intel Cluster Toolkit, my code REMP, and my post-processing package.
2. Using the cluster Shkaf-2, I performed multi-parametric 2D PIC simulations of the high-order harmonic generation (HHG) for various tailored plasma density profiles and different laser pulse parameters. Basing on the parameter survey, I performed a 3D PIC simulation. The parameter domain includes the conditions accessible in the future experiments with the newly constructed JKAREN-P laser at KPSI.
3. I investigated the scalings of the HHG. The predicted emission energy, brightness and divergence enabled to formulate optimal strategies for realizing a compact coherent x-ray source. A valuable by-product of my investigations is a large amount of high-resolution data on nonlinear processes in the laser-plasma interaction.
4. I performed dedicated simulations, which explained recent experimental finding of point-like sources of HHG in plasma irradiated by the J-KAREN laser. I investigated the HHG in preplasma formed in the laser interaction with a solid density target. Simulations showed that the harmonic quality indicates the laser-target interaction properties, which is crucial for diagnostics.
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Research Products
(2 results)
