The SG-III laser facility has been proposed to produce 1ns, 60-Id blue light pulses for ICF application at China Academy ofEngmeenng Physics The baseline design suggests that the SG-III be a 64-beam laser facility grouped into eight bundles with clear optical apertures of3Ocm x 30cm The facility consists ofmultiple subsystems, including the front end, preamplification and injection section, main amplifiers, beam transport and alignment system, switchyard, target area, integrated computer control, and beam diagnostics The amplifier column in each bundle contains eight beamlets stacked 4 high by 2 wide Great progress has been made m developing key laser technologies, such as integrated fiber optics, binary optics, adaptive optics, four-pass amplification, large aperture piasma electrode switches, rapid growth ofKDP brand-new laser glass, long fiashlamps, precision manufacturing of large optics and metalhzed self-healing capacitors Codes have been developed and numencal simulations have been conducted for the optical design ofthe facility The design ofthe Techmcal Integration Line ( TIL ) of 2 x 2 segmented array as a prototype module ofSG-III has been optimized and the construction will soon get started.
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