Fusion born alpha particle drift simulation with background turbulence by GPU computing

• Main Authors: BOTSZHUANG, 黃柏慈
• Other Authors: Yasutaro Nishimura
• Format: Others
• Language: en_US
• Published: 2013
• Online Access: http://ndltd.ncl.edu.tw/handle/57205422709144647809

碩士 === 國立成功大學 === 太空天文與電漿科學研究所 === 101 === This thesis investigates the fusion born alpha particle behavior in the presence of drift wave turbulence in toroidal geometry. We employed the guiding center motion and ballooning type drift wave as simulation model to examine the conservation of second adiabatic invariant. By the orbit-following code, we are able to control the parameter of particle and turbulence structure, e.g. particle energy and turbulence amplitude. In the analytical work , we found that parallel velocity is related to island width and the shift of island is proportional to ${omega}_{star}/V_{parallel}$. The statistical result is consistent with analytical work. In numerical work, for trapped particles, the second adiabatic does not easily break. Furthermore, the banana tip is sensitive to $E imes B$ drift since the $V_{parallel}$ is near zero. These numerical work are demonstrated by GPU's parallel computation , we can effectively reduce computation time and resource.