@inproceedings{oai:jaxa.repo.nii.ac.jp:00005912, author = {村中, 嵩信 and 八田, 真児 and Kim, Jeongho and Cho, Mengu and 上田, 裕子 and 古賀, 清一 and 五家, 建夫 and Muranaka, Takanobu and Hatta, Shinji and Kim, Jeongho and Cho, Mengu and Ueda Okada, Hiroko and Koga, Kiyokazu and Goka, Tateo}, book = {宇宙航空研究開発機構特別資料: 宇宙航空研究開発機構 情報・計算工学センター 衛星環境プラズマ数値シミュレーションワークショップ報告書, JAXA Special Publication: JAXA/JEDI Workshop on Numerical Plasma Simulation for Spacecraft Environment}, month = {Feb}, note = {Development of MUSCAT (Multi-Utility Spacecraft Charging Analysis Tool) had started in November 2004 as a quantitative spacecraft charging analysis tool in Japan. In the middle of development term, the beta version of MUSCAT has been released on March 2006 as the first version of integrated software. The integrated GUI (Graphical User Interface) tool of MUSCAT, called 'Vineyard' had been developed, which conducts the MUSCAT simulation on local Windows (trademark) PC. Functions of 'Vineyard' have parameter input panels including 3D satellite model, data converter from parameters in the GUI format into those in the solver format. As the development of the physical functions, fundamental physical elements such as photoelectron emission, secondary electron emission, auroral electrons had been included. As a result, the solver enables fundamental charging analyses at GEO (Geostationary Orbit), LEO (Low Earth Orbit) and PEO (Polar Earth Orbit), which makes MUSCAT feasible for multi-utility use. Parallelization and tuning of the code have almost been achieved, and eight-CPUs (Central Processing Unit) parallel computation can calculate absolute potential of a large-scale satellite model in a half size of maximum computation region of 256 x 64 x 128 in two days. Experiments for the code validation were made at LaSEINE (Laboratory of Spacecraft Environment Interaction Engineering) in KIT (Kyushu Institute of Technology). Spatial distribution of electric potential around the electrode of a Langmuir probe and IV (Current-Voltage) characteristic curve were measured, and we had good agreement in experimental results and the numerical ones. These results show that the physical functions of MUSCAT simulate charging processes quite well. For a function of plasma plume analysis of the MUSCAT solver, we consider a model of active emission of ions, which employs a fixed analytical beam ion profile and electrons of Boltzmann distribution. Distributions of CEX (Charge Exchange) ions are obtained by PIC (Particle in Cell) method, and electric field is obtained by solving non-linear Poisson equation. Backflow of CEX ions to spacecraft surface would contribute to fluctuations of the surface potential. The modeling and coding of that are now under development. Final version of MUSCAT will be released in March 2007 with this function., 資料番号: AA0063157005, レポート番号: JAXA-SP-06-014}, pages = {55--77}, publisher = {宇宙航空研究開発機構, Japan Aerospace Exploration Agency (JAXA)}, title = {MUSCAT project and its application to plasma plume analysis}, volume = {JAXA-SP-06-014}, year = {2007} }