Title
Reflection measurements in TNO’s 30 kW laser facility
Author
Meuken, D.
van Binsbergen, S.A.
Scheers, L.C.W.
van den Berg, P.J.
van Eijk, A.M.J.
Publication year
2022
Abstract
TNO has expanded its 30 kW HEL research facility with the capability to monitor specular and diffuse reflections of the laser beam. A capture screen and high-speed camera focus on dynamic specular reflections, while 15 individually placeable probes monitor the diffuse component under different angles. This paper introduces the reflection measurement capability and discusses the behaviour of steel and aluminium coupons under high-energy laser irradiation. Laser-material interaction was found to be rather predictable in thermal behaviour up to the perforation event. Reflections, however, showed a highly dynamic pattern, varying in magnitude and direction and depending on bulk material, material surface condition, phase state of the material (solid or liquid) and geometry. The difficulty of assessing proper stand-off distances for laser safety is illustrated.
Subject
(High-energy) lasers
Laser-material interaction
Reflections
Laser safety
Test facilities
To reference this document use:
http://resolver.tudelft.nl/uuid:2c95d05d-a6b4-48b1-a468-4946976f9686
TNO identifier
978205
Source
SPIE 12273, High-Power Lasers and Technologies for Optical Coumtermeasures, 2 november 2022
Document type
conference paper