NIFS atomic and molecular database and spectroscopic modelling for fusion plasma

We have constructed atomic and molecular (AM) databases on collision cross sections and rate coefficients and make them available via the internet at http://dbshino.nifs.ac.jp/ since 1997. Data compilation was started in the 1970s at the Institute of Plasma Physics (IPPJ), Nagoya University by a working group. The first compilation on atomic data of H and He and their isotopes for fusion research was published as a IPPJ report, since then we have compiled AM data on collision processes and plasma-wall interactions for fusion plasma research. Currently our database system has AMDIS (cross sections and rate coefficients of electron collision processes for atomis; 675,439 records as of Sep. 22, 2014), CHART (cross sections of heavy particle collision processes for atoms; 7,054 records), AMDIS-MOL and CHART-MOL (collision cross sections and rate coefficients for molecules; 3,951 records), SPUTY (sputtering yields for solids; 2,084 records), and BACKS (backscattering coefficients of solid surface; 396 records). The databases are retrievable and numerical data are shown as a graph or a table. Each data record contains bibliographic information, so original publications are traceable. We also provide many satellite databases which provide data files on, for example, electron dissociation attachment to molecular hydrogen, published as a NIFS-DATA report. Our work on AM data evaluation for some ions are published as IPPJ-AM reports and NIFS-DATA reports. We also work on spectroscopic modelling on impurity elements for fusion plasmas. Carbon and iron ions are studied for long time as main impurities. Atomic data and spectroscopic modelling on Fe ions are also important for astrophysical plasmas and we validated Fe XVII atomic data and modelling using Large Helical Device (LHD). Recently we intensively work on tungsten modelling and spectroscopic measurements with LHD and compact electron beam ion trap device (CoBIT). Our tungsten modelling can reproduce measured extreme ultraviolet spectra at 1.5-7 nm with W²⁰⁺-W³⁶⁺ ions. Their emission peaks of principal quantum number n=5-4 transitions at 1.5-4 nm are useful to examine charge state distributions of tungsten ions for plasma with electron temperature less than 2 keV. (author)