Recently, the "Shenguang" driver upgrade device developed by the high-power laser pointer physics joint laboratory successfully passed the comprehensive acceptance of the project. The upgraded device can output 8 beams with a total energy of 24kJ / 3ns / 3w nanoseconds and a single beam of 1kJ / 1ps / 1w picosecond laser, condensing many of China's optical, electronics, precision machinery, precision processing, materials science, etc. The achievements of technical research in the subject area during the "12th Five-Year Plan" period.
The device adopts the overall nanosecond laser technical scheme of "large-diameter isolation + boosted two-pass amplification + intracavity four-pass amplification + large-diameter deformable mirror" and "optical parametric chirped pulse amplification + large-diameter deformable mirror + large-diameter grating compression + Beam-target coupling "picosecond laser overall technical solution. The self-developed driver simulation design software has been verified and verified during the engineering design simulation and engineering construction process. Developed high-stability, high-quality nanosecond and picosecond front-end seed light source systems.
The technology of large-aperture isolation components, large-aperture deformable mirrors and large-aperture gratings is integrated and verified; precise control of the driver's laser near-field, far-field and time waveforms is achieved. During the trial operation, a total of 430 sub-physics experiments were completed. The operation status was good, and the success rate was better than 80%. The online assessment and rapid ignition decomposition and integration experiments of related physical diagnostic equipment were successfully completed. In the fast-ignition integrated experiment, a neutron gain of more than 40 times was achieved, and the highest neutron yield of indirect driving observed in the experiment was 9 × 105.
The completion of the comprehensive acceptance of the "Shenguang" driver upgrade device marks that China's high-power red laser pointer driver's overall design, overall integration, unit development, precision assembly and calibration, precision processing and other core technologies have reached a new level and have developed Develop the technical capabilities of laser driver development on a large scale. As the first inertial confinement fusion research physics experimental platform with long and short pulse output capability, the "Shenguang" driver upgrade device formally established in China will lay an important experimental foundation for the subsequent research and development of fusion physics.