Song Huai-Hang, Wang Wei-Min, Wang Jia-Qi, Li Yu-Tong, Zhang Jie
Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, CAS, Beijing 100190, China.
School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China.
Phys Rev E. 2020 Nov;102(5-1):053204. doi: 10.1103/PhysRevE.102.053204.
It is shown by multidimensional particle-in-cell simulations that intense secondary whistler waves with special vortexlike field topology can be excited by a relativistic laser pulse in the highly magnetized, near-critical density plasma. Such whistler waves with lower frequencies obliquely propagate on both sides of the laser propagation axis. The energy conversion rate from laser to whistler waves can exceed 15%. Their dispersion relations and field polarization properties can be well explained by the linear cold-plasma model. The present work presents a new excitation mechanism of whistler modes extending to the relativistic regime and could also be applied in magnetically assisted fast ignition.
