Analytic treatment of distributions of lithium neutrals and ions in linear devices
| Autor: | Hayato Tsuchiya, Naoko Ashikawa, In Je Kang, Heung Gyoon Harry Choi, Soon Gook Cho, Yoshi Hirooka, Kyu-Sun Chung |
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| Rok vydání: | 2017 |
| Předmět: |
010302 applied physics
Materials science Hydrogen Mechanical Engineering Monte Carlo method chemistry.chemical_element Plasma 01 natural sciences 010305 fluids & plasmas Magnetic field Ion Nuclear Energy and Engineering chemistry Heat flux 0103 physical sciences General Materials Science Lithium Atomic physics Diffusion (business) Civil and Structural Engineering |
| Zdroj: | Fusion Engineering and Design. 119:61-68 |
| ISSN: | 0920-3796 |
| Popis: | Neutral lithium (Li) has been used for the mitigation of heat flux to the plasma facing components and for the control of hydrogen of fusion plasmas. Radial and axial variations of densities of Li neutrals and ions are obtained analytically for a cylindrical chamber by assuming the classical diffusion with or without the magnetic field (B). Neutrals and ions without B can be expressed as a linear combination of the modified Bessel functions of order zero (I0 and K0), while ions with B are to be expressed as the square root of them. Analytical solutions of Li neutral densities with Dirichlet and Neumann boundary conditions are compared to those using Monte Carlo simulation and experimental values of the LIGHT-1 (Lithium Injection Gettering of Hydrogen and its Transport experiments) device. Proper combinations of the relaxation length and size of the source would produce well fitted profiles similar to those observed experimentally and those using Monte Carlo codes. |
| Databáze: | OpenAIRE |
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