Release Time:2019-03-11  Hits:

Indexed by: Journal Article

Date of Publication: 2018-03-01

Journal: PLASMA SCIENCE & TECHNOLOGY

Included Journals: EI、SCIE

Volume: 20

Issue: 3

ISSN: 1009-0630

Key Words: plasma facing components; laser speckle interferometry; morphology measurement

Abstract: The laser speckle interferometry approach provides the possibility of an in situ optical non-contacted measurement for the surface morphology of plasma facing components (PFCs), and the reconstruction image of the PFC surface morphology is computed by a numerical model based on a phase unwrapping algorithm. A remote speckle interferometry measurement at a distance of three meters for real divertor tiles retired from EAST was carried out in the laboratory to simulate a real detection condition on EAST. The preliminary surface morphology of the divertor tiles was well reproduced by the reconstructed geometric image. The feasibility and reliability of this approach for the real-time measurement of PFCs have been demonstrated.