Development of Laser Diagnostic Techniques for Clarification of Particle Behavior in Divertor Region

开发激光诊断技术以澄清偏滤器区域中的颗粒行为

基本信息

批准号：
08458111
负责人：
MURAOKA Katsunori
金额：
$ 4.48万
依托单位：
KYUSHU UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1996
资助国家：
日本
起止时间：
1996 至 1997
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08458111/
关键词：
divertor plasmas laser diagnostics Thomson scattering two photon LIF hydrogen behavior Raleigh scattering Raman scattering particle behavior

项目摘要

Macroscopic behavior in divertor region, such as the position of the ionization front and the distribution of the radiation intensity has to be understood by correlating these with plasma parameters there, such as electron temperature and density, atomic hydrogen density, and impurity density. In this study, we have performed to develop methods to measure the plasma parameters by fully exploiting the potensial of the laser-aided plasma diagnostics. These are Thomson scattering, two photon excited LIF (laser induced fluorescence), and Rayleigh and Raman scattering. The following results have been obtained.(1) Thomson scatteringWe have considered about LIDAR (light detection and ranging) Thomson scattering for divertors, and obtained that the necessary laser, having energy of 1 J and pulse width of 100-300 ps, is realizable using pulse compression technique. Also, a collaboration has been performed with JET divertor LIDAR and a preliminary result was obtained. In addition, lower detectio … More n limit of Thomson scattering has been studies using existing discharge plasmas. As a result, we obtained the detection limit of 1*10^<16>m^<-3>.(2) Two-photo excited LIFThe technique of the two photon excited LIF,applicable for divertor plasmas, has been studied experimentally and theoretically. In particular, we have established the nethod of yielding atomic hydrogen temperature from the deconvolved Doppler spectral profiles.(3) Rayleigh and Raman scatteringWe have demonstrated, for the first time, that Rayleigh and Raman scattering is applicable to measurements of atomic and molecular densities in actual plasmas. In particular, the former has yielded signals from densities of 10^<19>m^<-3>, while the latter has yielded preliminary results and analyzes are underway.We believe these achievements are useful in understanding particle behavior in divertor region, and in correlating these with macroscopic behavior of divertor plasmas, such as ionization front and radiation intensity distributions. Less

必须通过将它们与那里的等离子体参数相关联，例如电子温度和密度，原子氢密度和杂质密度，必须通过将它们与等离子体参数相关联，例如电离前端的位置和辐射强度的分布，例如离子化前端的位置和辐射强度的分布，例如离子化前端的位置和辐射强度的分布。在这项研究中，我们通过充分利用激光辅助血浆诊断的优势来开发测量血浆参数的方法。这些是Thomson散射，两个光子激发LIF（激光诱导的荧光），以及雷利和拉曼散射。（1）汤姆森散射我们已经考虑了转移的雷达（光检测和射程）汤森散射，并获得了使用脉冲压缩技术可实现的必要激光，其能量为1 J，脉冲宽度为100-300 ps。此外，还与Jet Rivertor LiDAR进行了协作，并获得了初步结果。此外，较低的检测……汤森散射的更多n极限一直在使用现有的排放等离子体进行研究。结果，我们获得了1*10^<16> m^<-3>的检测极限（2）两光激发的LIFTH lif The两个光子激发LIF的技术，适用于移动等离子体，已经在实验和理论上进行了研究。特别是，我们已经从反卷积的多普勒光谱曲线中建立了产量原子氢温度的Nethod。（3）Rayleigh和Raman Scactientingwe首次证明，Rayleigh和Raman散射适用于实际血浆中原子密度和分子密度的测量。特别是，前者的密度为10^<19> m^<-3>的信号，而后者产生了初步结果和分析。我们相信这些成就有助于理解移动区域的粒子行为，并且与诸如离子面积和辐射强度分布的分离型等离子的巨大行为相关。较少的