质子加速器（proton加速器）是一类用于使质子获得高动能的装置，广泛应用于医学、材料科学与基础物理研究。
其工作原理是通过高频电场对带电质子做功以加速，同时借助磁场引导或束缚粒子轨道，常见类型包括回旋加速器、同步加速器和直线加速器。
质子束的布拉格峰特性使其在肿瘤放疗中能够将能量集中沉积于肿瘤组织，显著减少周围正常组织的剂量，因此质子治疗在某些肿瘤类型中具有明显优势。
科研方面，质子加速器用于核物理实验、同位素制备、辐照材料改性与表征等。
当前主要挑战是设备体积大、建造与运行成本高，以及对屏蔽和安全管理的高要求。
未来发展方向包括紧凑型和桌面化加速器、激光驱动的质子源、高强度束流与治疗技术结合，以及降低成本以扩大临床可及性。
这些进展将推动质子加速器在临床与科研中的更广泛应用。
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