Characterization of muon and electron beams in the Paul Scherrer Institute PiM1 channel for the MUSE experiment

E. Cline*, W. Lin, P. Roy, P. E. Reimer, K. E. Mesick, A. Akmal, A. Alie, H. Atac, A. Atencio, C. Ayerbe Gayoso, N. Benmouna, F. Benmokhtar, J. C. Bernauer, W. J. Briscoe, J. Campbell, D. Cohen, E. O. Cohen, C. Collicott, K. Deiters, S. DograE. Downie, I. P. Fernando, A. Flannery, T. Gautam, D. Ghosal, R. Gilman, A. Golossanov, B. F. Halter, J. Hirschman, Y. Ilieva, M. Kim, M. Kohl, B. Krusche, I. Lavrukhin, L. Li, B. Liang-Gilman, A. Liyanage, W. Lorenzon, P. Mohanmurthy, R. Mokal, P. Moran, S. J. Nazeer, P. Or, T. Patel, E. Piasetzky, T. Rauber, R. S. Raymond, D. Reggiani, H. Reid, G. Ron, E. Rooney, T. Rostomyan, M. Schwarz, A. Sneath, P. G. Solazzo, N. Sparveris, N. Steinberg, S. Strauch, V. Sulkosky, N. Wuerfel

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


The MUon Scattering Experiment, MUSE, at the Paul Scherrer Institute, Switzerland, investigates the proton charge radius puzzle, lepton universality, and two-photon exchange, via simultaneous measurements of elastic muon-proton and electron-proton scattering. The experiment uses the PiM1 secondary beam channel, which was designed for high precision pion scattering measurements. We review the properties of the beam line established for pions. We discuss the production processes that generate the electron and muon beams, and the simulations of these processes. Simulations of the π/μ/e beams through the channel using TURTLE and G4beamline are compared. The G4beamline simulation is then compared to several experimental measurements of the channel, including the momentum dispersion at the intermediate focal plane and target, the shape of the beam spot at the target, and timing measurements that allow the beam momenta to be determined. We conclude that the PiM1 channel can be used for high precision π, μ, and e scattering.

Original languageAmerican English
Article number055201
JournalPhysical Review C
Issue number5
StatePublished - May 2022

Bibliographical note

Publisher Copyright:
© 2022 American Physical Society.


Dive into the research topics of 'Characterization of muon and electron beams in the Paul Scherrer Institute PiM1 channel for the MUSE experiment'. Together they form a unique fingerprint.

Cite this