We propose a novel scheme for generating a compact laser-driven plasma wiggler capable of producing high-energy γ-ray radiation in near-critical density plasma (NCDP). Using full three-dimensional particle-in-cell (PIC) simulations, we investigate the interaction of two intense laser pulses propagating at specific crossing angles as they overlap within the NCDP. The resulting interference pattern forms a standing wave that simultaneously modulates the local plasma density and traps relativistic electrons, thereby creating a periodic plasma wiggler structure with sub-micron spatial periods. This self-organized wiggler supports ultra-strong electromagnetic fields that effectively oscillate injected electron beams, leading to tunable γ-ray emission with low divergence. Systematic parameter scans identify optimal conditions for maximizing radiation yield and tailoring spectral properties. The proposed approach offers a promising and controllable pathway for developing compact, efficient, and tunable X-ray and γ-ray sources for advanced applications.

radiation generation : x-ray and gamma-ray, particle beams :, radiation : emission