We are working on atomic and molecular data and their application with collaboration of Japanese scientists as well as foreign scientists in the Atomic and Molecular Data Research Center (AMDRC) of the National Institute for Fusion Science (NIFS). We organize working groups to compile atomic data and to apply atomic data in plasmas. The atomic numerical databases in NIFS can be used through the Web (http://dbshino.nifs.ac.jp) and are widely used over the world. These data are indispensable to plasma modeling, diagnostics, or data analysis in fusion or plasma experiments. Four kinds of numerical data (AMDIS (electron impact), CHART (ion impact), SPUTY (sputtering), BACKS (backscattering)) can be retrieved through the Web. Users can retrieve the data by elements or other attributes and display them in a tabular and in a graphical form. The data produced by different authors for a certain transition can be compared on one graph. This is an advantage of our database. The databases are free of charge for research purpose for registered users. Recently we have made new databases for molecular collisions by electron impact and by ion impact.
In order to use data in application, it is necessary to evaluate the data. We recently carried out a data evaluation for charge transfer reactions involving Li ions. Evaluation of atomic data relating to carbon atom and ions is now in progress. We are calculating state selective dielectronic recombination rate coefficients for L-shell ions. We maintain a collisional radiative model for K and L-shell ions for spectral analysis. We are developing a collisional radiative model including doubly excited states. We also work on numerical modeling of atomic processes in dense plasmas produced by fuel-pellet ablation and/or short pulse laser interaction. This modeling includes hydrodynamic simulation and calculation of laser interaction using theoretical electrical conductivity properties of dense plasmas. Mixed quantum - classical model for a excited state hydrogen atom formation of backscattered protons at wall surface is also being developed.