Laser Pulse Simulation of High Energy Transient Thermal Loads on Bulk and Plasma Sprayed W for NFR
W is a plasma-facing material candidate for applications in future nuclear fusion reactors (NFR). In this work transient thermal loads of high energy have been simulated by interaction with a single laser pulse. The experiments have been carried out by using the Nd:Glass TVLPS laser working in first harmonic (wavelength λ = 1064 nm); the pulse parameters are: energy E ≈ 8 J, pulse duration ∆t ≈ 15 ns, focal spot size Φ = 200 μm, surface power density on the focal plane I = 1.7 x 1012 W/cm2.The damage produced by the laser pulse on the surface of bulk and plasma sprayed W has been investigated by Scanning Electron Microscopy (SEM) observations. The preliminary results will be presented.
C. Sommitsch, M. Ionescu, B. Mishra, E. Kozeschnik and T. Chandra
M. Richetta et al., "Laser Pulse Simulation of High Energy Transient Thermal Loads on Bulk and Plasma Sprayed W for NFR", Materials Science Forum, Vol. 879, pp. 1576-1581, 2017