First Experimental Demonstration of Beam Storage by a Three-Dimensional Spiral Injection Scheme for Ultracompact Storage Rings

Physical Review Letters 2026 Open access

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Authors: R.Matsushita, H. Iinuma, Satoshi OHSAWA, H. Nakayama, K. Furukawa, S. Ogawa, N. Saito, T. Mibe, M. A. Rehman
DOI: 10.1103/8nxx-srgz
Cited by: 0
References: 17

Abstract

Three-dimensional spiral injection enables beam storage in ultracompact rings with nanosecond revolution periods. We report first storage of a 297 keV/c electron beam in a 22 cm weak-focusing ring with a 4.7 ns revolution period using a 140 ns kicker pulse. A scintillating-fiber detector observes signals >5σ above noise for ≥1 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 ultracompact storage rings for next-generation precision measurements including short-lived particles.

Fields of Study & Subjects

Particle accelerators and beam dynamics Particle Accelerators and Free-Electron Lasers Crystallography and Radiation Phenomena

Publication details

Journal / source
Physical Review Letters
Volume
137
Issue
2
Pages
025002–025002
Publication date
21 May 2026
Language
EN