This paper describes observations of injected radio wave power getting absorbed by edge ions in the DIII-D tokamak. It’s a valuable observation because we inject those radio waves in order to heat the plasma more towards the center of the tokamak, so if some of that energy gets absorbed by particles in the far edge, then […]
Transport of energetic ions due to sawteeth, Alfvén eigenmodes, and microturbulence
This paper discusses three different plasma phenomena that lead to transport of beam ions in tokamaks. The material was first presented as an invited talk at the 23rd IAEA Fusion Energy Conference in Daejon, Republic of Korea in 2010. That IAEA meeting is held every two years and it represents the largest (most important?) fusion-specific […]
Thesis – Appendix B: Pulse Detection Techniques
Thesis – Table of Contents Pulse Detection Techniques Overview The study of exponential spectra and accompanying Lorentzian pulses in time series data requires that the pulses be isolated for determining their characteristic widths. A variety of identification techniques have been applied to the large data set of this experiment, and notes on two of these […]
Thesis – Appendix A: Wavelet Analysis to Calculate Power Spectra
Thesis – Table of Contents Wavelet Analysis to Calculate Power Spectra Overview Wavelet analysis techniques, while not as commonly understood as Fourier analysis, are nonetheless frequently applied to problems in which time and frequency information are desired simultaneously. Analysis suites such as IDL (popular in plasma physics circles) provide complete libraries for easily incorporating these […]
Thesis – Chapter 7: Conclusions
Thesis – Table of Contents Conclusions Studies of filamentary pressure structures are an ongoing work within the LAPD-U laboratory. The work of Burke, et al. [1998, 2000a, b] (and [Burke, 1999]) established the ability of this experimental geometry to observe classical transport in magnetically confined plasmas. An increase in transport and the loss of classical […]
Thesis – Chapter 6: Plasma Flow Parallel to Background Magnetic Field
Thesis – Table of Contents Plasma Flow Parallel to Background Magnetic Field Plasma flow is studied in relation to another aspect of this thesis, namely the thermal wave. This section examines describes flows aligned with the applied background magnetic field, i.e., parallel flows. Spatiotemporal Behavior and Modeling A comparison of the time evolution of parallel […]