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Phase space compression of a positive muon beam in two spatial dimensions
by A. Antognini, N. J. Ayres, I. Belosevic, V. Bondar, A. Eggenberger, M. Hildebrandt, R. Iwai, K. Kirch, A. Knecht, G. Lospalluto, J. Nuber, A. Papa, M. Sakurai, I. Solovyev, D. Taqqu, T. Yan
Submission summary
| Authors (as registered SciPost users): | Ryoto Iwai |
| Submission information | |
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| Preprint Link: | https://arxiv.org/abs/2410.21162v3 (pdf) |
| Date accepted: | Sept. 29, 2025 |
| Date submitted: | Sept. 12, 2025, 3:26 p.m. |
| Submitted by: | Ryoto Iwai |
| Submitted to: | SciPost Physics Core |
| Ontological classification | |
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| Academic field: | Physics |
| Specialties: |
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| Approach: | Experimental |
Abstract
We present the first demonstration of simultaneous phase space compression in two spatial dimensions of a positive muon beam, the first stage of the novel high-brightness muon beam under development by the muCool collaboration at the Paul Scherrer Institute. The keV-energy, sub-mm size beam would enable a factor 10$^5$ improvement in brightness for precision muSR, and atomic and particle physics measurements with positive muons. This compression is achieved within a cryogenic helium gas target with a strong density gradient, placed in a homogeneous magnetic field, under the influence of a complex electric field. In the next phase, the muon beam will be extracted into vacuum.
Published as SciPost Phys. Core 8, 071 (2025)
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