The Dynamics of Electrons in Linear Plasma Devices and Its Impact on Plasma Surface Interaction

✍ Scribed by Michael Hubeny

Publisher: Springer International Publishing
Year: 2019
Tongue: English
Leaves: 137
Series: Springer Theses
Edition: 1st ed.
Category: Library

No coin nor oath required. For personal study only.

✦ Synopsis

Turbulence in plasma surface interaction holds crucial uncertainties for its impact on material erosion in the operation of fusion reactors. In this thesis, the design, development and operation of a Thomson scattering diagnostic and its novel implementation with fast visual imaging created a versatile tool to investigate intermittently occuring plasma oscillations. Specifically, ballistic transport events in the plasma edge, constituting turbulent transport, have been targeted in this thesis. With the help of a custom photon counting algorithm, the conditional averaging technique was applied on Thomson scattering for the first time to allow spatial and pseudo-time-resolved measurements.
Since plasma turbulence and the emerging transport phenomena are comparable in most magnetized devices, the diagnostic development and the results from the linear plasma device PSI-2 are useful for an implementation of similar techniques in larger fusion experiments. Furthermore, the obtained results indicate a strong enhancement of erosion with turbulent transport and thus underline the importance of dedicated experiments investigating plasma turbulence in the framework of erosion in future fusion reactors.

✦ Table of Contents

Front Matter ....Pages i-xiv
Introduction (Michael Hubeny)....Pages 1-8
Plasma Wall Transition Dynamics (Michael Hubeny)....Pages 9-21
Laser Light Scattering as Plasma Diagnostic (Michael Hubeny)....Pages 23-32
Experimental Setup on PSI-2 (Michael Hubeny)....Pages 33-40
Thomson Scattering Setup (Michael Hubeny)....Pages 41-52
Data Analysis and Calibration (Michael Hubeny)....Pages 53-70
Steady State Plasma Results (Michael Hubeny)....Pages 71-84
Plasma Turbulence Results (Michael Hubeny)....Pages 85-117
Summary and Conclusion (Michael Hubeny)....Pages 119-123
Back Matter ....Pages 125-126

✦ Subjects

Physics; Plasma Physics; Energy Systems; Tribology, Corrosion and Coatings; Surface and Interface Science, Thin Films; Atoms and Molecules in Strong Fields, Laser Matter Interaction

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