Category Archives: 内部研讨报告

2014年5月20号五室第四十二期研讨会

 2014年520五室第四十二期研讨会

 

  目:托卡马克低高模转换的理论及进展    (下载章扬中老师5月20日讲义

报告人:章扬忠,谢涛

          中国科学技术大学

  间: 2014520日(星期二)  14:00—16:00

  点: 4号楼6楼中间会议室

  要:

自上世纪90年代发现托卡马克低高模转换以来,其主流解释为“触发剪切流对微湍流的抑制”。在回顾这一理论历史进程的基础上,介绍近年来与带状流有关的三个理论课题的主要物理内容:

  • 轴对称环状静电模的漂移波湍流参量激发(物理学报,2014,63, 035202)
  • 轴对称声模的漂移波湍流参量激发与离子朗道阻尼
  • 等离子体漂移波沿剪切磁面法向的群速度

2014年5月19–21号五室第四十,四十一期研讨会

2014年519–21五室第四十,四十一期研讨会

  目:Turbulence in Fluids and MHD    (iter071)(turb-lecture

报告人: Dr. Bruce Scott

Max-Planck-Institut für Plasmaphysik

  间:2014519日(星期一)  14:00—16:00

              2014年5月21日(星期三)  14:00—16:00

  点:4号楼601会议室

  要:

This is an introduction to turbulence generally and turbulence in magnetised plasmas specifically. Turbulence is a statistical phenomenon involving interactions between many degrees of freedom, usually manifested as vortices or eddies at a wide range of scales. In fluids, the motion is mostly of the shearing type and the basic models are homogeneous and incompressible. In the presence of a gradient, the turbulence itself can still be treated as homogeneous and the gradient as a drive, or “stirring,” mechanism. The basic picture is called a “cascade” due to the fact that the stirring injects energy at large scale, and the eddies pass energy successively to slightly smaller eddies, and so on down to small scales at which it is consumed by diffusive or viscous dissipation. Homogeneous turbulence involves quadratic nonlinearities which interact through a large set of three wave combinations, a result following from the properties of Fourier transforms. The various three wave triads are expected to be statistically independent, which gives the turbulence its basic character. Fluid turbulence is kept incompressible by the pressure, and MHD or magnetised fluid turbulence is kept so by the magnetic field.

2014 年5月12号 五室第三十九期研讨会报告

2014 年5月12号 五室第三十九期研讨会报告   The L-H transition on East

报告人: Prof. Jan Weiland12

1  Chalmers University of Technology, Sweden and EURATOM-VR

Association, Gothenburg, Sweden

2  Presently guest professor at ASIPP, Hefei, China

  要:

We have simulated the L-H transition on the EAST tokamak using a predictive transport code where ion and electron temperatures, electron density and poloidal and toroidal momenta are simulated self consistently. This is, as far as we know, the first theory based  simulation of an L-H transition including the whole radius and not making any assumptions about where the barrier should be formed. The L-H power threshold increases with the temperature at the separatrix. This is why the power threshold increases linearly with the magnetic field in agreement with the threshold on C-mod. The values of the αmhd and αdia, as defined by Rogers, Drake and Zeiler 1998, have been found to be in the H-mode regime of their turbulence simulations in the H-mode barrier. The power used in EAST was found to be about 20% above the threshold for the L-H transition.

2013-11-07日研讨会文档

胡砚强_读书报告

2013年11月14日读书报告

2013年11月14日贾国章读书报告 2013.11.14-贾国章

2013-10-29六室王亮报告

六室王亮老师报告:  Divertor heat and particle flux study in the EAST superconducting tokamak

2013-10-24理论室研讨报告文件

叶磊 读书报告tokamak_chapter4

胡友俊: 什么是朗道阻尼?

2013-9-12研讨报告文档

胡业民: ELM物理机制及其控制的理论与数值模拟研究

翟雪梅读书报告:托卡马克5.9节

2013-9-5研讨会报告文档

李德徽:用粒子模拟方法研究射频波的介绍

陈佳乐: Tokamak_4.12~4.16_Scaling laws_0905

2013-8-29研讨会报告文档

杨程:低杂波加热的射线追踪以及全波解模拟
杨友磊:Tokamak读书报告