Japan Atomic Energy Agency

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The Japan Atomic Energy Agency (JAEA) has been producing, collecting and compiling cross section data for atomic and molecular collisions and spectral data relevant to fusion research. The atomic and molecular data activities in JAEA are pursued by sponsored researches with Japanese universities and in collaboration with other department of JAEA

The electron capture cross sections of singly and doubly ionized tungsten ions by collision with H2, CH4, C2H6, He, Ne, Ar and Kr were measured at collision energies of 5, 10 and 15 keV. The state selective charge transfer cross sections of Be2+, Be3+, B5+ and C6+ by collision with H*(2s) and H*(2p) in the collision energy range between 62 eV/amu and 6.2 keV/amu were calculated with the improved molecular-bases close-coupling method. The state specific dissociative recombination cross sections for H2+ were calculated with the improved multi-channel quantum defect theory. The analytic expressions for the recommended cross section for the He collision systems (214 processes in these 4 years) were produced or revised in order to facilitate use of the data.

The compiled data are being prepared for Web publication at the URL http://www-jt60.naka.jaea.go.jp/english/JEAMDL/ The charge transfer data for 36 processes published in 2007 and 2008 have been compiled, and a database for the chemical sputtering yield data of impurity-doped graphite materials with hydrogen isotope collisions has been established. The 3s-3p and 3p-3d lines of W~60+ around 2 nm have been identified in 15-keV plasma in JT-60U.

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