2024/10/15 by Aritome, S., Futatsukawa, K., Hara, H. +52 · 1 citation
#Accelerator Physics (physics.acc-ph) #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex)
paper · doi:10.48550/arxiv.2410.11367
Acceleration of positive muons from thermal energy to 100~keV has been demonstrated. Thermal muons were generated by resonant multi-photon ionization of muonium atoms emitted from a sheet of laser-ablated aerogel. The thermal muons were first electrostatically accelerated to 5.7~keV, followed by further acceleration to 100 keV using a radio-frequency quadrupole. The transverse normalized emittance of the accelerated muons in the horizontal and vertical planes were 0.85 ± 0.25 ~\rm(stat.)~+0.22-0.13 ~\rm(syst.)~π~mm⋅mrad and 0.32± 0.03~\rm(stat.) +0.05-0.02 ~\rm(syst.)~π~mm⋅mrad, respectively. The measured emittance values demonstrated phase space reduction by a factor of 2.0× 102 (horizontal) and 4.1× 102 (vertical) allowing good acceleration efficiency. These results pave the way to realize the first-ever muon accelerator for a variety of applications in particle physics, material science, and other fields.