Laser induced fluorescence (LIF) technique development activity for measurement of plasma parameters in ITER divertor plasma is described. Helium density is the task of priority, but Doppler measurement of ion (atom) temperatures is also the aim of the program. The concept of ITER scenarios includes injection of "extrinsic" impurities (Ne, Ar, and Kr). It is possible to use the species as tracing elements for measurement of T(i), T(a). The program included modeling experiments on PNX-U (a multicusp trap with microwave argon plasma). Helium was added by puffing into discharge. Temperatures T(i)(Ar(1+)) and T(a)(He(0)) have been measured by scanning laser line across absorption line of species. Summarizing of fluorescence signals provided input data for estimation of Ar(1+) and He(0) densities via interpretative collisional-radiative models. Besides, the collisional-radiative model has been used for estimation of electron density using the ratio of fluorescence signals at 388.9 and 706.5 nm helium lines.
The measurement of divertor plasma parameters is an important problem for ITER from the point of view of performance evaluation and physics. The activity in the field of developing laser-induced fluorescence diagnostics (LIF-technique) for measuring plasma parameters in the divertor with good spatial and temporal resolution is presented. These parameters include the density and temperature of helium and inert gases (Ne, Ar, Kr), which are injected to distribute energy fluxes over a large surface. The development of Collisional-Radiative Models is intended to help interpret the LIF-technique experimental information, and to devise methods to measure the local parameters of electron components by LIF-methods.Experiments in modelling helium have been performed on the T-10 tokamak and the HELLA devices. Measurements of Ar 1þ ion temperature and density by laser spectroscopy methods have been carried out on the PNX-U machine. The parameters of a prototype laser source are presented.
The lidar remote sensing techniques are powerful tools for monitoring of gaseous toxic species in atmosphere over wide areas. The paper presented describes design, development and field testing of Mobile Lidar System (MLS) based on utilization of Differencial Absorption Lidar (DIAL) technique. The activity is performed by Russian Research Center "Kurchatov Institute" and Research Institute of Pulse Technique within the project "Mobile Remote Sensing System Based on Tunable Laser Transmitter for Environmental Mothtoring' under funding of International Scientific and Technology Center (ISTC ) Moscow . A brief description of MLS is presented including narrowband transmitter, receiver, system steering , data acquisition subsystem and software. MLS is housed in a mobile truck and is able to provide threedimensional mapping of gaseous species. Sulfur dioxide and elemental mercury were chosen as basic atmospheric pollutants for field test of MLS. The problem of anthropogenic ozone detection attracts attention due to increase traffic in Moscow. The experimental sites for field testing are located in Moscow Region. Examples of field DIAL measurements will be presented. Application of remote sensing to toxic species near-real time measurements is now under consideration. The objective is comparison of pollution level in working zone with maximum permissible concentration of hazardous pollutant.
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