The MUSE Target Chamber Post Veto

R. Ratvasky; T. Rostomyan; M. Ali; H. Atac; F. Barchetti; J. C. Bernauer; W. J. Briscoe; A. Christopher Ndukwe; E. W. Cline; S. Das; K. Deiters; E. J. Downie; Z. Duan; A. Flannery; M. Foster; A. Friebolin; M. Gantert; R. Gilman; A. Golossanov; J. Guo; J. Hirschman; A. Hofer; N. S. Ifat; Y. Ilieva; D. Jayakodige; T. Krahulik; M. Kohl; I. Lavrukhin; W. Lin; W. Lorenzon; P. MohanMurthy; M. Nicol; M. Paolone; T. Patel; A. Prosnyakov; R. D. Ransome; R. Raymond; H. Reid; P. E. Reimer; R. Richards; G. Ron; O. M. Ruimi; K. Salamone; S. Shrestha; N. Sparveris; S. Strauch; N. Wuerfel; D. A. Yaari; C. Zimmerli

doi:10.1016/j.nima.2026.171621

The MUSE Target Chamber Post Veto

R. Ratvasky
, T. Rostomyan
, M. Ali
, H. Atac
, F. Barchetti
, J. C. Bernauer
, W. J. Briscoe
, A. Christopher Ndukwe
, E. W. Cline
, S. Das
, K. Deiters
, E. J. Downie
, Z. Duan
, A. Flannery
, M. Foster
, A. Friebolin
, M. Gantert
, R. Gilman
, A. Golossanov
, J. Guo

J. Hirschman, A. Hofer, N. S. Ifat, Y. Ilieva, D. Jayakodige, T. Krahulik, M. Kohl, I. Lavrukhin, W. Lin, W. Lorenzon, P. MohanMurthy, M. Nicol, M. Paolone, T. Patel, A. Prosnyakov, R. D. Ransome, R. Raymond, H. Reid, P. E. Reimer, R. Richards, G. Ron, O. M. Ruimi, K. Salamone, S. Shrestha, N. Sparveris, S. Strauch, N. Wuerfel, D. A. Yaari, C. Zimmerli

Physics and Astronomy

George Washington University
Argonne National Laboratory
Paul Scherrer Institute
New Mexico State University
Temple University
Hampton University
Stony Brook University
Massachusetts Institute of Technology
Rutgers - The State University of New Jersey, New Brunswick
University of South Carolina
University of Michigan, Ann Arbor
Hebrew University of Jerusalem
Helmholtz Institute Mainz
GSI Helmholtz Centre for Heavy Ion Research
Johannes Gutenberg University Mainz

Research output: Contribution to journal › Article › peer-review

Abstract

The Muon Scattering Experiment (MUSE) was developed to address the proton radius puzzle through simultaneous electron–proton and muon-proton scattering using the Paul Scherrer Institute's πM1 secondary beamline. MUSE uses a large-solid-angle, non-magnetic spectrometer to detect beam particles scattering from a liquid hydrogen cell contained within a vacuum chamber. Due to the large scattering windows, the structural integrity of the chamber is supported by posts located at small scattering angles. While out of the acceptance, particles in the tails of the beam distribution can strike these posts, causing a significant trigger background. We describe the design and performance of the Target Chamber Post Veto (TCPV) detector installed inside the vacuum chamber to remove these background events at the trigger level.

Original language	English
Article number	171621
Journal	Nuclear Inst. and Methods in Physics Research, A
Volume	1090
DOIs	https://doi.org/10.1016/j.nima.2026.171621
State	Published - Oct 2026

Keywords

MUSE
Plastic scintillators
Proton radius puzzle
SiPM
Wavelength-shifting fibers

Access to Document

10.1016/j.nima.2026.171621

Cite this

Ratvasky, R., Rostomyan, T., Ali, M., Atac, H., Barchetti, F., Bernauer, J. C., Briscoe, W. J., Ndukwe, A. C., Cline, E. W., Das, S., Deiters, K., Downie, E. J., Duan, Z., Flannery, A., Foster, M., Friebolin, A., Gantert, M., Gilman, R., Golossanov, A., ... Zimmerli, C. (2026). The MUSE Target Chamber Post Veto. Nuclear Inst. and Methods in Physics Research, A, 1090, Article 171621. https://doi.org/10.1016/j.nima.2026.171621

@article{76730b6244c14f76b0a6c4f2307cde73,

title = "The MUSE Target Chamber Post Veto",

abstract = "The Muon Scattering Experiment (MUSE) was developed to address the proton radius puzzle through simultaneous electron–proton and muon-proton scattering using the Paul Scherrer Institute's πM1 secondary beamline. MUSE uses a large-solid-angle, non-magnetic spectrometer to detect beam particles scattering from a liquid hydrogen cell contained within a vacuum chamber. Due to the large scattering windows, the structural integrity of the chamber is supported by posts located at small scattering angles. While out of the acceptance, particles in the tails of the beam distribution can strike these posts, causing a significant trigger background. We describe the design and performance of the Target Chamber Post Veto (TCPV) detector installed inside the vacuum chamber to remove these background events at the trigger level.",

keywords = "MUSE, Plastic scintillators, Proton radius puzzle, SiPM, Wavelength-shifting fibers",

author = "R. Ratvasky and T. Rostomyan and M. Ali and H. Atac and F. Barchetti and Bernauer, \{J. C.\} and Briscoe, \{W. J.\} and Ndukwe, \{A. Christopher\} and Cline, \{E. W.\} and S. Das and K. Deiters and Downie, \{E. J.\} and Z. Duan and A. Flannery and M. Foster and A. Friebolin and M. Gantert and R. Gilman and A. Golossanov and J. Guo and J. Hirschman and A. Hofer and Ifat, \{N. S.\} and Y. Ilieva and D. Jayakodige and T. Krahulik and M. Kohl and I. Lavrukhin and W. Lin and W. Lorenzon and P. MohanMurthy and M. Nicol and M. Paolone and T. Patel and A. Prosnyakov and Ransome, \{R. D.\} and R. Raymond and H. Reid and Reimer, \{P. E.\} and R. Richards and G. Ron and Ruimi, \{O. M.\} and K. Salamone and S. Shrestha and N. Sparveris and S. Strauch and N. Wuerfel and Yaari, \{D. A.\} and C. Zimmerli",

note = "Publisher Copyright: {\textcopyright} 2026",

year = "2026",

month = oct,

doi = "10.1016/j.nima.2026.171621",

language = "English",

volume = "1090",

journal = "Nuclear Inst. and Methods in Physics Research, A",

issn = "0168-9002",

}

Ratvasky, R, Rostomyan, T, Ali, M, Atac, H, Barchetti, F, Bernauer, JC, Briscoe, WJ, Ndukwe, AC, Cline, EW, Das, S, Deiters, K, Downie, EJ, Duan, Z, Flannery, A, Foster, M, Friebolin, A, Gantert, M, Gilman, R, Golossanov, A, Guo, J, Hirschman, J, Hofer, A, Ifat, NS, Ilieva, Y, Jayakodige, D, Krahulik, T, Kohl, M, Lavrukhin, I, Lin, W, Lorenzon, W, MohanMurthy, P, Nicol, M, Paolone, M, Patel, T, Prosnyakov, A, Ransome, RD, Raymond, R, Reid, H, Reimer, PE, Richards, R, Ron, G, Ruimi, OM, Salamone, K, Shrestha, S, Sparveris, N, Strauch, S, Wuerfel, N, Yaari, DA & Zimmerli, C 2026, 'The MUSE Target Chamber Post Veto', Nuclear Inst. and Methods in Physics Research, A, vol. 1090, 171621. https://doi.org/10.1016/j.nima.2026.171621

TY - JOUR

T1 - The MUSE Target Chamber Post Veto

AU - Ratvasky, R.

AU - Rostomyan, T.

AU - Ali, M.

AU - Atac, H.

AU - Barchetti, F.

AU - Bernauer, J. C.

AU - Briscoe, W. J.

AU - Ndukwe, A. Christopher

AU - Cline, E. W.

AU - Das, S.

AU - Deiters, K.

AU - Downie, E. J.

AU - Duan, Z.

AU - Flannery, A.

AU - Foster, M.

AU - Friebolin, A.

AU - Gantert, M.

AU - Gilman, R.

AU - Golossanov, A.

AU - Guo, J.

AU - Hirschman, J.

AU - Hofer, A.

AU - Ifat, N. S.

AU - Ilieva, Y.

AU - Jayakodige, D.

AU - Krahulik, T.

AU - Kohl, M.

AU - Lavrukhin, I.

AU - Lin, W.

AU - Lorenzon, W.

AU - MohanMurthy, P.

AU - Nicol, M.

AU - Paolone, M.

AU - Patel, T.

AU - Prosnyakov, A.

AU - Ransome, R. D.

AU - Raymond, R.

AU - Reid, H.

AU - Reimer, P. E.

AU - Richards, R.

AU - Ron, G.

AU - Ruimi, O. M.

AU - Salamone, K.

AU - Shrestha, S.

AU - Sparveris, N.

AU - Strauch, S.

AU - Wuerfel, N.

AU - Yaari, D. A.

AU - Zimmerli, C.

PY - 2026/10

Y1 - 2026/10

N2 - The Muon Scattering Experiment (MUSE) was developed to address the proton radius puzzle through simultaneous electron–proton and muon-proton scattering using the Paul Scherrer Institute's πM1 secondary beamline. MUSE uses a large-solid-angle, non-magnetic spectrometer to detect beam particles scattering from a liquid hydrogen cell contained within a vacuum chamber. Due to the large scattering windows, the structural integrity of the chamber is supported by posts located at small scattering angles. While out of the acceptance, particles in the tails of the beam distribution can strike these posts, causing a significant trigger background. We describe the design and performance of the Target Chamber Post Veto (TCPV) detector installed inside the vacuum chamber to remove these background events at the trigger level.

AB - The Muon Scattering Experiment (MUSE) was developed to address the proton radius puzzle through simultaneous electron–proton and muon-proton scattering using the Paul Scherrer Institute's πM1 secondary beamline. MUSE uses a large-solid-angle, non-magnetic spectrometer to detect beam particles scattering from a liquid hydrogen cell contained within a vacuum chamber. Due to the large scattering windows, the structural integrity of the chamber is supported by posts located at small scattering angles. While out of the acceptance, particles in the tails of the beam distribution can strike these posts, causing a significant trigger background. We describe the design and performance of the Target Chamber Post Veto (TCPV) detector installed inside the vacuum chamber to remove these background events at the trigger level.

KW - MUSE

KW - Plastic scintillators

KW - Proton radius puzzle

KW - SiPM

KW - Wavelength-shifting fibers

UR - https://www.scopus.com/pages/publications/105037714978

U2 - 10.1016/j.nima.2026.171621

DO - 10.1016/j.nima.2026.171621

M3 - Article

AN - SCOPUS:105037714978

SN - 0168-9002

VL - 1090

JO - Nuclear Inst. and Methods in Physics Research, A

JF - Nuclear Inst. and Methods in Physics Research, A

M1 - 171621

ER -

The MUSE Target Chamber Post Veto

Abstract

Keywords

Access to Document

Other files and links

Fingerprint

Cite this