98 citations · 229 across the 8 of their papers we have counts for
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physics.ins-det2015★ 13 cited
Positron extraction to an electromagnetic field free region
D. A. Cooke, G. Barandun, S. Vergani +3
We describe a scheme for high efficiency (about 90%) extraction of 50 ns positron bunches from a buffer gas trap in an electromagnetic field free region. The positrons are time bun…
physics.atom-ph2015★ 30 cited
Observation of positronium annihilation in the 2S state: towards a new measurement of the 1S-2S transition frequency
D. A. Cooke, P. Crivelli, J. Alnis +8
We report the first observation of the annihilation of positronium from the 2S state. Positronium (Ps) is excited with a two-photon transition from the 1S to the 2S state where its…