July 2014

Conference Paper

Digital Holography for in Situ Real-Time Measurement of Plasma-Facing-Component Erosion

By:
Thomas, C.; Granstedt, E.; Biewer, Theodore M; Baylor, Larry R; Combs, Stephen K; Meitner, Steven J; Hillis, Donald L; Majeski, R.; Kaita, R.
Journal Name:
Review of Scientific Instruments
Page Number:
001-003
Volume:
85
Issue Number:
11
Publication Date:
July 2014
Conference Name:
20th Topical Conference on High-Temperature Plasma Diagnostics (HTPD)
Conference Location:
Atlanta, Georgia, United States of America

Abstract

In situ, real time measurement of net plasma-facing-component (PFC) erosion/deposition in a real plasma device is challenging due to the need for good spatial and temporal resolution, sufficient sensitivity, and immunity to fringe-jump errors. Design of a high-sensitivity, potentially high-speed, dual-wavelength CO2 laser digital holography system (nominally immune to fringe jumps) for PFC erosion measurement is discussed.