Recent development of PW laser and ion acceleration in SKL in SIOM (Conference Presentation)

Abstract

Recent development of PW laser and ion acceleration in SKL in SIOM The recent developments of the PW laser system (SULF) and ion acceleration in State Key Laboratory (SKL) of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics (SIOM) are introduced. A double beam image (DBI) technique is coupled in the two-stage accelerating mechanism to simultaneously improve the spectra and maximum energy of the proton beam. The cascaded shock acceleration mechanism and the cascaded TNSA mechanism work together to generate a proton beam with a narrow-spectrum center at 5.4 MeV and a long tail up to 14.4 MeV. Experimental and simulation results show that spatial collineation, time synchronization, and real-time monitoring are needed for optimum two-stage proton acceleration and are realized by the DBI technique to a certain extent in our experiment. Depending on DBI, the narrow spectral ion beam with low charge-to-mass (C2+) generated by triple-stage acceleration mechanism are also investigated by a simple numerical model and partially verified by the experiment. In addition, some new manipulations on particles are investigated by the Laguerre–Gaussian (LG) laser in the relativistic region, which are subverted from the classical tweezers, spanner, or wrench driven by the weak LG light or LG laser in previous studies.