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 […]
Convective beam ion losses due to Alfven eigenmodes in DIII-D reversed-shear plasmas
This paper presents the first observations of coherent beam ion losses due to plasma waves in the DIII-D tokamak. The actual measurement is the flux of beam ions that hit a probe located at the outer wall. That diagnostic, the Fast Ion Loss Detector (FILD), was built as part of a collaboration with the ASDEX Upgrade tokamak. […]
Modeling the Response of a Fast Ion Loss Detector Using Orbit Tracing Techniques in a Neutral Beam Prompt Loss Study on the DIII-D Tokamak
This paper details a method for correlating measurements of beam ion losses with the injection of individual beams in the DIII-D tokamak. This turns out to be a great tool for making sense of the measurements. The probe measures ion impacts, and then we use particle orbit calculations to backtrack the ions to specific beams. […]
Thesis – Chapter 5: Comparison between Temperature Filament and Limiter-Edge Experiments
Thesis – Table of Contents Comparisons Between Turbulent Features of the Temperature Filament and Limiter-Edge Experiments About the Limiter-Edge Experiment The limiter-edge experiment focuses on properties and generation of intermittent, or bursty, turbulence structures. As with the temperature filament experiment of this thesis, the turbulence study is motivated by the relevance to transport. Intermittent turbulence […]
Thesis – Chapter 4: Exponential Frequency Spectrum and Lorentzian Pulses (Part 2)
Thesis – Table of Contents Exponential Frequency Spectrum and Lorentzian Pulses (cont.) 4.3 Lorentzian Pulses The normalized form of a temporal Lorentzian pulse, L(t) , is (Eq. 4.1), where the pulse is centered at time to and has width τ. In 4.1, the time width is equal to one-half of the full width at half […]