An in-house developed remote LIBS system. The instrumentation uses a Nd:Yag pulsed laser at 1064nm with pulse duration ~5ns that focuses 40mJ of light into a spot size of ~1 mm to ablate the material. The pulse energy can be adjusted and can ablate successive layers in depth by applying multiple laser pulses. A telescope collects light from the plume and directs it through a fibre to a set of spectrometers covering the range from ~200nm to ~900nm with spectral resolution of ~0.2nm. Both the laser and the collection optics are placed on computer controlled pan/tilt stages. A small camera is attached to record the area of analysis.

Dataset

Micro-destructive (removal or permanent alteration of very small, inconspicuous portions)

small spot