서지주요정보
Development of gyrokinetic simulation code for the study of electrostatic drift wave turbulence = 난류성 정전기 표류파 연구를 위한 전산모사 코드 개발
서명 / 저자 Development of gyrokinetic simulation code for the study of electrostatic drift wave turbulence = 난류성 정전기 표류파 연구를 위한 전산모사 코드 개발 / Jae-Min Kwon.
저자명 Kwon, Jae-Min ; 권재민
발행사항 [대전 : 한국과학기술원, 2003].
Online Access 원문보기 원문인쇄

소장정보

등록번호

8014241

소장위치/청구기호

학술문화관(문화관) 보존서고

DPH 03007

SMS전송

도서상태

이용가능

대출가능

반납예정일

초록정보

Global drift wave map equations that allow the integration of particle orbits on long time scales are implemented to describe transport. Ensembles of test particles are tracked to simulate the Low-confinement mode/Reversed Shear/Enhanced Reversed Shear plasmas in Tokamak Fusion Test Reactor(TFTR) tokamak and the Optimized Shear plasma in Joint European Torus(JET) tokamak. The simulations incorporate a radial electric field, $\overline{E}_r$, obtained from a neoclassical calculation, and a model for drift wave fluctuations that takes into account change in the mode structure due to $\overline{E}_r$. Steady state particle density profiles along with two different measures of transport, the diffusion coefficient based on a running time average of the particle displacement and that calculated from the mean exit time, are obtained. For either weak or reversed magnetic shear and highly sheared $\overline{E}_r$, particle transport barriers are observed to be established. In the presence of such a transport barrier, it is shown that there is, in general, a difference between the two measures of transport. The difference is explained by a simple model of the transport barrier. To investigate the physical properties of the electrostatic ion temperature gradient turbulence occurred in toroidal plasmas and associated ion energy and particle transports, we developed a numerical simulation program. The program was designed to solve the gyrokinetic Vlasov Poisson system by using the δ f particle in cell simulation scheme in 3-dimensional toroidal geometry in fully parallel ways. Its performance was tested varying number of processing elements used in calculation and we could confirm a good scalability. For the validation of the simulation program, we compared the simulation results with known analytical solutions and local analysis. The linear simulation results showed a good agreement with the solutions of the local dispersion relation and reproduced the well known characteristics of the ballooning eigenmode. For nonlinear simulation, we could reproduce the turbulence saturation by the self generated zonal flow.

서지기타정보

서지기타정보
청구기호 {DPH 03007
형태사항 vi, 61 p. : 삽도 ; 26 cm
언어 영어
일반주기 저자명의 한글표기 : 권재민
지도교수의 영문표기 : Hong-Young Chang
지도교수의 한글표기 : 장홍영
학위논문 학위논문(박사) - 한국과학기술원 : 물리학과,
서지주기 Reference : p. 58-61
주제 drift wave
gyrokinetic simulation
tokamak
난류성 표류파
전산모사
토카막
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