Dissertation > Excellent graduate degree dissertation topics show

Magnetic Fluctuation Measurement and Analysis on SUNIST

Author: LiuJun
Tutor: WangWenHao
School: Tsinghua University
Course: Nuclear Science and Technology
Keywords: SUNIST Spherical Tokamak magnetic fluctuations anomalous transport turbulence
CLC: TL631.24
Type: Master's thesis
Year: 2008
Downloads: 25
Quote: 0
Read: Download Dissertation


SUNIST, built as the first Spherical Tokamak in China, focus mainly on advancing our understanding of the magnetic confinement plasma physics at a low aspect ratio (R/a down to 1.3) and demonstrating the possibility of the stable plasma setup by non-inductive startup. The main task of this article is concentrating on magnetic fluctuations measurement, making use of the magnetic field measurement system, and the subsequent analysis of the relationship between magnetic fluctuations and the anomalous transport. It is well-known that fluctuations in the magnetic field are a potent mechanism for the anomalous transport of energy in confined plasmas. A lot of correlative research has been taken in the reversed field pinch and the traditional tokamak and indicated that there is a close relationship between magnetic fluctuations and edge transport. Unfortunately, limited by the feasible positions of coils, all previous research concentrated on the edge plasmas, which is obviously not direct enough to reflect the propagating situation of turbulence from the core to the SOL. Our work is to investigate the relationship between magnetic fluctuations and anomalous transport in Spherical tokamaks (STs) from the core to the limiter. Concretely, we take the research with the magnetic field measurement system and give the radial profiles of magnetic fluctuations, which indicate that the magnetic-fluctuation-driven transports cannot be ignored compared with the electrostatic-fluctuation-driven ones. Then we use the standard two-point-cross-correlation technique to estimate wavenumber spectrum and give the phase velocity of turbulence, which indicates that the turbulence transports radially both in the outward and inward direction, and the superposition effect makes the turbulence transport from the core to the SOL. Besides, both the radical profiles of phase velocity and that of correlation coefficient indicate that the SOL has a certain effect on anomalous transports.

Related Dissertations

  1. Wind turbulence characteristics of the bulk particulate matter pollution impact study wind erosion,X513
  2. Characteristics of Turbulent Structure and Transfer over the South China Coastal Region,P732
  3. Based on binary optical coupling lens array antenna research and,TN820.15
  4. The Research of Image Restoration Based on Phase Diversity Method,TP391.41
  5. SST -based soft abrasive and impact stream flow and experimental study of mechanical properties,TG664
  6. Numerical Calculation of the Flutter Stablity for Long-Span Suspension Bridge,U441.3
  7. The Clinical Value of Heart Rate Turbulence in Patients with Acute Coronary Syndrome,R541.4
  8. Numerical Simulation and Application of Frazil Ice Evolution in Diversion Channel in High Attitude and Cold Regions,TV134.9
  9. The Analysis of Momentum Fluxes and Marine Atmospheric Boundary Turbulence Characteristics,P732
  10. Taklimakan Desert tower Turbulent Characteristics,P425.2
  11. The Effects of Turbulence on Laser Transmission Quality and Improvement,TN241
  12. Turbine flow numerical simulation of fluid-structure coupling vibration,O353.4
  13. Numerical Simulations of Iced Airfoils,V211.4
  14. Lattice Boltzmann Simulation of the Homogeneous Isotropic Turbulence,O357.5
  15. Study of the MHD Instabilities on SUNIST Spherical Tokamak,TL631.24
  16. Based on the length of the blades of the numerical simulation of Francis turbine flow field,TK733.1
  17. Turbulent Structure Measurements and the Relative Technique Researches of Supersonic Flow over a Backward Facing Step,V216.7
  18. Research and Application on Hydro Viscous Drive,TH137
  19. Numerical Simulation and Analysis of the Internal Flow in a Centrifugal Paper Pump with Open-impeller,TH311
  20. Numerical Study of Flow Characteristics and Performance Inside Centrifugal Impeller,TH452
  21. The Research of the Impact of Atmospheric Turbulence on the Space Lingt-Single Mode Fiber Coupling Efficiency,TN929.13

CLC: > Industrial Technology > Nuclear technology > Controlled thermonuclear reactions ( fusion reaction theory and experimental facilities) > Thermonuclear device > Magnetic confinement devices > Closed plasma device > Tokamak
© 2012 www.DissertationTopic.Net  Mobile