The Concept of an Erosion Monitor for In-Vessel ITER Components with the Use of a Pulsed Laser

• Published in: Physics of atomic nuclei Vol. 82; no. 7; pp. 977 - 980
• Main Authors: Bondarenko, A. V., Vysotsky, D. V., Tugarinov, S. N.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01-12-2019; Springer; Springer Nature B.V
• Subjects: CMOS; Diagnostic systems; Electronic cameras; Erosion control; Laser industry; Lasers; Parameter estimation; Particle and Nuclear Physics; Physics; Physics and Astronomy; Pulsed lasers; Solid state lasers; Speckle interferometry; Tunable lasers; Vessels; Vibration; first wall; tokamak ITER; laser; erosion and deposition; interferometry
• ISSN: 1063-7788; 1562-692X
• DOI: 10.1134/S1063778819070044

The erosion monitor is the ITER diagnostic system designed to control the erosion and deposition of materials on the plasma-facing components of the vacuum vessel under the influence of particle flows and radiation from the plasma. The required accuracy and range of measurements can be achieved using the two-frequency speckle interferometry method. However, because of vibration of the installation, the images should be taken in such a short time that is not provided by existing CMOS cameras. In this paper, it is proposed to use an interferometer based on a pulsed solid-state laser with a tunable radiation wavelength, and methods for recording interferograms under vibration conditions are considered. The required laser parameters are estimated; the expected results are analyzed.