Core Insights - The successful experiment marks a significant milestone in the development of high repetition frequency extreme ultraviolet free electron laser technology in China [1][3] - The project, initiated in 2020, has been supported by the Dalian municipal government and involves a collaborative team from Dalian Institute of Chemical Physics and Shenzhen Advanced Light Source Research Institute [1] Group 1 - The research team, led by Academician Yang Xueming and researcher Zhang Weiqing, achieved a stable output of 1 million Hertz repetition frequency electron beam flow [1] - Key technologies developed include photonic cathode electron gun, ultrafast laser system, solid-state RF power source, superconducting accelerator, and low-temperature liquid helium system [1] - The testing platform has achieved a stable acceleration operation of 0.1 milliampere average current electron beam, with energy exceeding 100 million electron volts and pulse charge greater than 100 picocoulombs [2] Group 2 - The platform demonstrated stable operation for 1 hour with energy stability better than 0.01% (RMS) [2] - The success of this experiment is crucial for advancing the construction and research of high repetition frequency free electron laser devices in China [3]

5日，记者从中国科学院大连化学物理研究所（以下简称"大连化物所"）获悉，由中国科学院院士、大 连化物所研究员杨学明，大连化物所研究员张未卿带领的联合研发团队，首次成功实现高重复频率极紫 外自由电子激光装置（以下简称"大连先进光源"）预研项目1百万赫兹重复频率电子束流的稳定贯通实 验。这标志着大连先进光源联合团队已掌握相关核心技术，为未来大连先进光源的建设奠定了坚实基 础。 据了解，大连先进光源预研项目启动于2020年，由大连化物所大连光源科学研究室与深圳先进光源研究 院组成的联合团队共同承担，大连市政府资助部署，旨在攻克产生高重复频率、高品质电子束的各项关 键核心技术。 经过5年的不懈努力，联合团队相继攻克了光阴极电子枪、超快激光系统、全固态射频功率源、超导加 速器、低温液氦系统等关键技术，并于今年上半年完成了设备安装和在线独立调试。在半个月的系统联 合调试后，联合团队尝试开展百万赫兹级重复频率电子束流实验，并于7月24日23时15分成功实现了稳 定出束。 （文章来源：科技日报） 目前，该束流测试平台已实现0.1毫安平均流强电子束流的稳定加速运行。具体技术指标包括电子束流 能量大于1亿电子伏特、单脉冲电荷量大 ...