Demonstration of muon-beam transverse phase-space compression

Antognini, A.; Ayres, N.J.; Belosevic, I.; Bondar, V.; Eggenberger, A.; Hildebrandt, M.; Iwai, R.; Kaplan, D.M.; Khaw, K.S.; Kirch, K.; Knecht, A.; Papa, A.; Petitjean, C.; Phillips, T.J.; Piegsa, F.M.; Ritjoho, N.; Stoykov, A.; Taqqu, D.; Wichmann, G.

doi:10.1103/PhysRevLett.125.164802

Demonstration of muon-beam transverse phase-space compression

Antognini A, Ayres NJ, Belosevic I, Bondar V, Eggenberger A, Hildebrandt M, Iwai R, Kaplan DM, Khaw KS, Kirch K, Knecht A, Papa A, Petitjean C, Phillips TJ, Piegsa FM, Ritjoho N, Stoykov A, Taqqu D & Wichmann G

Citation

Antognini, A., Ayres, N. J., Belosevic, I., Bondar, V., Eggenberger, A., Hildebrandt, M., … Wichmann, G. (2020). Demonstration of muon-beam transverse phase-space compression. Physical Review Letters, 125(16), 164802 (6 pp.). https://doi.org/10.1103/PhysRevLett.125.164802

Persistent URL https://www.dora.lib4ri.ch/psi/islandora/object/psi:34873

We demonstrate efficient transverse compression of a 12.5 MeV/c muon beam stopped in a helium gas target featuring a vertical density gradient and crossed electric and magnetic fields. The muon stop distribution extending vertically over 14 mm was reduced to a 0.25 mm size (rms) within 3.5 μs. The simulation including cross sections for low-energy μ⁺-He elastic and charge exchange (μ⁺ ↔ muonium) collisions describes the measurements well. By combining the transverse compression stage with a previously demonstrated longitudinal compression stage, we can improve the phase space density of a μ⁺ beam by a factor of 10¹⁰ with 10^-3 efficiency.