Prior to the recent commissioning of the first National Ignition Facility (NIF) beamline, full-scale laser-amplifier-glass cleanliness experiments are performed. Aerosol measurements and obscuration data acquired using a modified flatbed scanner compare favorably to historical large-scale lasers and indicate that NIF is the cleanest large-scale laser built to date.
John Honig, John Honig,
"Cleanliness improvements of National Ignition Facility amplifiers as compared to previous large-scale lasers," Optical Engineering 43(12), (1 December 2004). https://doi.org/10.1117/1.1815320