1. Investigation of terahertz radiation generation from laser-wakefield acceleration.
- Author
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Rezaei-Pandari, Mohammad, Mirzaie, Mohammad, Hojbota, Calin Ioan, Niknam, Ali Reza, Massudi, Reza, Kim, Ki-Yong, and Nam, Chang Hee
- Subjects
- *
SUBMILLIMETER waves , *FEMTOSECOND pulses , *ELECTROMAGNETIC fields , *LASER-plasma interactions , *GAS distribution , *RADIATION sources , *MAGNETIC fields , *ELECTROMAGNETIC radiation - Abstract
We investigate the generation of terahertz (THz) radiation from laser-wakefield acceleration (LWFA) in a helium gas jet. We consider a three-dimensional setup incorporating a realistic gas density distribution and use particle-in-cell simulations to study the interaction of a femtosecond intense laser pulse with the gas medium. Our results show that LWFA can efficiently produce THz radiation. In the simulations, we use multiple probes to record the electric and magnetic fields arising from the interaction. In addition, we compare the results of fixed and moving window simulation boxes used to capture electromagnetic fields in the THz range. We demonstrate that a moving window with a 600 μm width can be significantly useful for THz studies. We further analyze the spectrum of spatially and temporally resolved electromagnetic radiation and its emission angle. Our results are consistent with experimental data. Our findings provide valuable insights into the potential of LWFA as a strong source of THz radiation. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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