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

^*Corresponding author for this work

Racah Institute of Physics

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 Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	1090
DOIs	https://doi.org/10.1016/j.nima.2026.171621
State	Published - Oct 2026

Bibliographical note

Publisher Copyright:
© 2026

Keywords

MUSE
Plastic scintillators
Proton radius puzzle
SiPM
Wavelength-shifting fibers

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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 Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1090, Article 171621. https://doi.org/10.1016/j.nima.2026.171621

@article{980feec37a5e4b11901bf92a57dec092,

title = "The MUSE Target Chamber Post Veto",

abstract = "The Muon Scattering Experiment (MUSE) was developed to address the proton radius puzzle through simultaneous electron{\textendash}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 = "אנגלית",

volume = "1090",

journal = "Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment",

issn = "0168-9002",

publisher = "Elsevier B.V.",

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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 Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 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 - ???researchoutput.researchoutputtypes.contributiontojournal.article???

AN - SCOPUS:105037714978

SN - 0168-9002

VL - 1090

JO - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

JF - Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment

M1 - 171621

ER -

The MUSE Target Chamber Post Veto

Abstract

Bibliographical note

Keywords

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