The timing sequence, between different pulses in SG-III laser facility, is controlled with three arbitrary waveform generators. The external clock and trigger are used to inhibit the timing jitter, which is provided by the synchronization system. Close-loop monitoring is used to make sure that the temporal phase can be recovered after reboot of the arbitrary waveform generator. The verification experiment shows that the three arbitrary waveform generators can work synchronously , which ensures the synchronization error control of the SG-III laser facility.
A polymer coating was designed and prepared to modify the surface of CIP to match the hardness of KDP, and deliquescence removal was explored by addition proper water online. The above techniques not only weaken the mechanical scratches and increase removal rate, but also are beneficial for subsequently cleaning. Removal function exhibits particular transitional zone on the edge of finishing spot which clearly demonstrates the existence of different processing mechanisms simultaneously. The figure accuracy and PSD1 of a large-aperture KDP are apparently converged after MRF.
The CeO2 nanoparticles with modified surface and mean sizes distribution during 107.0 nm - 127.7 nm are used as abrasive in magnetorheological finishing (MRF) fluid. The slow rotation dispersion without shearing thinning is better
than fast emulsification dispersion. Steady D-shaped finishing spots and high quality precise processing surface with
PV=0.1λ, GRMS=0.002λ/cm, Rq=0.83 nm are obtained on a 435 mm x 435 mm BK7 glass under self-developed MRF