Plasma Wakefield Acceleration and Astrophysical Instabilities at FACET-II

The FACET-II National User Facility at SLAC National Accelerator Laboratory provides uniquely high current and density electron beams at 10GeV to develop advanced acceleration and coherent radiation techniques. This broad science program includes studies on electron beam-driven plasma wakefield acceleration (PWFA), including the generation of high-energy, ultra-bright beams through plasma injection techniques, and demonstrating multi-GeV/m acceleration with high transfer efficiency and maintaining high beam brightness - paving the way for future PWFA-based linear colliders and light sources. Additionally, the intense beams of electrons delivered by the facility are capable of probing the relativistic plasma instabilities that are prevalent in astrophysical phenomena. In this talk I will present recent results from the FACET-II science program, highlighting research on electron beam-driven PWFA and astrophysical instabilities.