首次实验验证三维螺旋注入方案在超紧凑存储环中的束流存储
First Experimental Demonstration of Beam Storage by Three-Dimensional Spiral Injection Scheme for Ultra-Compact Storage Rings
AI总结：
本研究首次在超紧凑存储环中通过三维螺旋注入方案实现了电子束存储，验证了该方法在高精度测量中的应用潜力。
摘要：
三维螺旋注入使在纳秒回转周期的超紧凑环中实现束流存储成为可能。我们报告了首次在22厘米弱聚焦环中用140纳秒 kicker脉冲存储297 keV/c电子束，其回转周期为4.7纳秒。闪烁纤维探测器观察到信号高于噪声5σ以上持续至少1微秒，改变弱聚焦场势移动力学存储束区域，与蒙特卡洛预测一致，验证了束流存储。这一原理验证为下一代高精度测量的超紧凑存储环开辟了道路。
英文摘要：
Three-dimensional spiral injection enables beam storage in ultra-compact rings with nanosecond revolution periods. We report first storage of a $297 \, \mathrm{keV/}c$ electron beam in a $22 \,\mathrm{cm}$ weak-focusing ring with a $4.7\,\mathrm{ns}$ revolution period using a $140\,\mathrm{ns}$ kicker pulse. A scintillating-fiber detector observes signals $>5σ$ above noise for $\geq 1\, \mathrm{μs}$, and varying the weak-focusing field potential shifts the stored-beam region, consistent with Monte Carlo predictions, validating beam storage. This proof-of-principle opens a path to ultra-compact storage rings for next-generation precision measurements.
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