Prior to establishing operation of the world’s first multiturn superconducting energy recovery linac, the Cornell-BNL energy recovery test accelerator was configured for one-turn energy recovery. In this setup, direct measurement of the beam loading in each of the main linac cavities demonstrated high energy recovery efficiency. Specifically, a total one-turn power balance efficiency of 99.4%, with per cavity power balances ranging from 99.2–99.8% was measured. When accounting for small particle losses occurring in the path length adjustment sections of the return loop, the per cavity power balances correspond to per cavity single particle energy recovery efficiencies ranging from 99.8 to 100.5%. A maximum current of $70\mu \mathrm{A}$, limited by the an incomplete radiation shielding installation around the main beam stop at the time of these measurements, was energy recovered.

中文翻译：

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在单匝Cornell-Brookhaven ERL测试加速器配置中测量每腔能量回收效率

在建立世界上第一个多匝超导能量回收直线加速器之前，康奈尔-BNL能量回收测试加速器已配置用于单匝能量回收。在这种设置中，直接测量每个主直线加速器腔中的光束负载证明了很高的​​能量回收效率。具体而言，测得的总一圈功率平衡效率为99.4％，每个腔体的功率平衡范围为99.2–99.8％。当考虑到在返回回路的路径长度调节部分中发生的小颗粒损失时，每个腔的功率平衡对应于每个腔的单颗粒能量回收效率，范围为99.8至100.5％。最大电流$70\mu \mathrm{一种}$在进行这些测量时，受主光束停止器周围不完整的辐射屏蔽装置的限制，回收了能量。