4.5 Article Proceedings Paper

Dust as a versatile matter for high-temperature plasma diagnostic

Journal

REVIEW OF SCIENTIFIC INSTRUMENTS
Volume 79, Issue 10, Pages -

Publisher

AMER INST PHYSICS
DOI: 10.1063/1.2953409

Keywords

dust; photometry; plasma diagnostics; plasma flow

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Dust varies from a few nanometers to a fraction of a millimeter in size. Dust also offers essentially unlimited choices in material composition and structure. The potential of dust for high-temperature plasma diagnostic is largely unfulfilled yet. The principles of dust spectroscopy to measure internal magnetic field, microparticle tracer velocimetry to measure plasma flow, and dust photometry to measure heat flux are described. Two main components of the different dust diagnostics are a dust injector and a dust imaging system. The dust injector delivers a certain number of dust grains into a plasma. The imaging system collects and selectively detects certain photons resulted from dust-plasma interaction. One piece of dust gives the local plasma quantity, a collection of dust grains together reveals either two-dimensional (using only one or two imaging cameras) or three-dimensional (using two or more imaging cameras) structures of the measured quantity. A generic conceptual design suitable for all three types of dust diagnostics is presented.

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