On April 14,the Joint Laboratory on High-Power Laser Physics hosted the sixth"Shenguang · Zhixing"Forum in the Conference Room on the 4th Floor of Building 8. The forum featured an academic lecture by Professor Shi Yin from the School of Nuclear Science and Technology,University of Science and Technology of China (USTC),titled "Axial Megatesla Magnetic Field Generation for kJ-PW-Class Multi-Beam Laser Facilities". The session was chaired by Associate Researcher Zhu Ping.
In his presentation, Professor Shi Yin introduced a novel scheme for generating axial strong magnetic fields (reaching multi-ten-kilotesla levels) using a kJ-PW-class multi-beam laser facility. The method employs multiple vorticity-aligned laser beams irradiating a target. Through Particle-in-Cell (PIC) simulations and theoreticalmodeling, he demonstrated that this approach efficiently transfers angular momentum tothe plasma. Hot electrons carrying axial angular momentum form a high-intensity rotating current, which sustains a strong, axial, azimuthally symmetric magnetic field within a substantial volume (tens of thousands of cubic micrometers) at multi-ten-kilotesla levels (peaking above 10,000 Tesla), maintaining stability over picosecond timescales. Furthermore, based on SG-II facility parameters, he analyzed the impacts of laser polarization, pulse delay, phase jitter, and pointing jitter.
During the Q&A session,Professor Shi Yin engaged in in-depth discussions with attendees on key scientific issues,including:
Following the forum,Professor Shi Yin visited the SG-II series of major scientific facilities.
