Laser-plasma acceleration offers significant potential for generating compact, ultrashort ion beams, but its broader deployment is hindered by challenges such as low shot-to-shot stability, large beam divergence, and limitations in high-repetition-rate operation. Here, I report on a promising approach to address these issues using a novel liquid‑sheet target at the GEMINI TA2 laser facility (10 TW, 5 Hz). In this work, we demonstrated stable acceleration of few-MeV proton beams via target normal sheath acceleration. The resulting beams exhibited high flux and markedly reduced divergence compared to proton beams produced from conventional thin-foil targets. Supporting PIC simulations indicate that a low‑density background vapour surrounding the target plays a crucial role in the observed beam collimation through the generation of azimuthal magnetic fields that act to focus the proton beam. This acceleration regime is compatible with kHz repetition rates or higher-energy laser systems, extending its applicability to a wide range of future ion‑beam-driven applications.