Description
This work presents a comprehensive optical diagnostic framework for laser-plasma accelerators, focusing on advanced interferometry. We introduce a high-sensitivity, four-pass interferometry setup designed for precise analysis of gas target density profiles, which are crucial for Laser Wakefield Acceleration (LWFA) and X-ray generation.
The experimental setup accurately measures the phase shift from laser propagation, allowing 3D density profile reconstruction via Filtered Back Projection (FBP) tomography. Due to the high precision of the four-pass configuration, fine details like density shocks are clearly observed. Additionally, we provide a comparative analysis between neutral gas and direct plasma density measurements, demonstrating the reliability of these techniques in characterizing accelerator systems.
