The SHMS 11 GeV/c spectrometer in Hall C at Jefferson Lab

S. Ali; A. Ahmidouch; G. R. Ambrose; A. Asaturyan; C. Ayerbe Gayoso; J. Benesch; V. Berdnikov; H. Bhatt; D. Bhetuwal; D. Biswas; P. Brindza; M. Bukhari; M. Burton; R. Carlini; M. Carmignotto; M. E. Christy; C. Cotton; J. Crafts; D. Day; S. Danagoulian; A. Dittmann; D. H. Dongwi; B. Duran; D. Dutta; R. Ent; H. Fenker; M. Fowler; D. Gaskell; A. Hamdi; N. Heinrich; W. Henry; N. Hlavin; T. Horn; G. M. Huber; Y. Ilieva; J. Jarrell; S. Jia; M. K. Jones; M. Junaid; M. L. Kabir; N. Kalantarians; A. Karki; S. J.D. Kay; C. E. Keppel; V. Kumar; S. Lassiter; W. B. Li; D. Mack; S. Malace; J. McMahon; A. Mkrtchyan; H. Mkrtchyan; P. Monaghan; C. Morean; P. Nadel-Turonski; G. Niculescu; M. I. Niculescu; A. Nadeeshani; E. Pooser; A. Ramos; J. Reinhold; B. Sawatzky; H. Szumila-Vance; V. Tadevosyan; R. L. Trotta; A. Usman; C. Yero; M. Yurov; S. Zhamkochyan; S. A. Wood; J. Zhang

doi:10.1016/j.nima.2025.171070

The SHMS 11 GeV/c spectrometer in Hall C at Jefferson Lab

S. Ali
, A. Ahmidouch
, G. R. Ambrose
, A. Asaturyan
, C. Ayerbe Gayoso
, J. Benesch
, V. Berdnikov
, H. Bhatt
, D. Bhetuwal
, D. Biswas
, P. Brindza
, M. Bukhari
, M. Burton
, R. Carlini
, M. Carmignotto
, M. E. Christy
, C. Cotton
, J. Crafts
, D. Day
, S. Danagoulian

A. Dittmann, D. H. Dongwi, B. Duran, D. Dutta, R. Ent, H. Fenker, M. Fowler, D. Gaskell, A. Hamdi, N. Heinrich, W. Henry, N. Hlavin, T. Horn, G. M. Huber, Y. Ilieva, J. Jarrell, S. Jia, M. K. Jones, M. Junaid, M. L. Kabir, N. Kalantarians, A. Karki, S. J.D. Kay, C. E. Keppel, V. Kumar, S. Lassiter, W. B. Li, D. Mack, S. Malace, J. McMahon, A. Mkrtchyan, H. Mkrtchyan, P. Monaghan, C. Morean, P. Nadel-Turonski, G. Niculescu, M. I. Niculescu, A. Nadeeshani, E. Pooser, A. Ramos, J. Reinhold, B. Sawatzky, H. Szumila-Vance, V. Tadevosyan, R. L. Trotta, A. Usman, C. Yero, M. Yurov, S. Zhamkochyan, S. A. Wood, J. Zhang

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

Abstract

The Super High Momentum Spectrometer (SHMS) has been built for Hall C at the Thomas Jefferson National Accelerator Facility (Jefferson Lab). With a momentum capability reaching 11 GeV/c, the SHMS provides measurements of charged particles produced in electron-scattering experiments using the maximum available beam energy from the upgraded Jefferson Lab accelerator. The SHMS is an ion-optics magnetic spectrometer comprised of a series of new superconducting magnets which transport charged particles through an array of triggering, tracking, and particle-identification detectors that measure momentum, energy, angle and position in order to allow kinematic reconstruction of the events back to their origin at the scattering target. The detector system is protected from background radiation by a sophisticated shielding enclosure. The entire spectrometer is mounted on a rotating support structure which permits measurements to be taken with a large acceptance over laboratory scattering angles from 5.5° to 40°, thus allowing a wide range of low cross-section experiments to be conducted. These experiments complement and extend the previous Hall C research program to higher energies.

Original language	English
Article number	171070
Journal	Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume	1083
DOIs	https://doi.org/10.1016/j.nima.2025.171070
State	Published - Mar 2026
Externally published	Yes

Funding

This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics under contract DE-AC05-06OR23177 . This work is supported by the Natural Sciences and Engineering Research Council of Canada (NSERC) SAPIN-2021-00026 and an award from the SAP-RTI program. This work was supported in part by the United States National Science Foundation grants PHY1914034 , PHY1039446 , PHY2309976 , PHY2012430 and the Consortium MRI , PHY0723062 .

Keywords

Electron calorimetry
Electron scattering
Magnetic spectrometer
Particle identification
Radiation shielding
Tracking detectors

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10.1016/j.nima.2025.171070

Cite this

Ali, S., Ahmidouch, A., Ambrose, G. R., Asaturyan, A., Gayoso, C. A., Benesch, J., Berdnikov, V., Bhatt, H., Bhetuwal, D., Biswas, D., Brindza, P., Bukhari, M., Burton, M., Carlini, R., Carmignotto, M., Christy, M. E., Cotton, C., Crafts, J., Day, D., ... Zhang, J. (2026). The SHMS 11 GeV/c spectrometer in Hall C at Jefferson Lab. Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1083, Article 171070. https://doi.org/10.1016/j.nima.2025.171070

@article{c7cf6c3abfa640c3aaddf8f136d0f523,

title = "The SHMS 11 GeV/c spectrometer in Hall C at Jefferson Lab",

abstract = "The Super High Momentum Spectrometer (SHMS) has been built for Hall C at the Thomas Jefferson National Accelerator Facility (Jefferson Lab). With a momentum capability reaching 11 GeV/c, the SHMS provides measurements of charged particles produced in electron-scattering experiments using the maximum available beam energy from the upgraded Jefferson Lab accelerator. The SHMS is an ion-optics magnetic spectrometer comprised of a series of new superconducting magnets which transport charged particles through an array of triggering, tracking, and particle-identification detectors that measure momentum, energy, angle and position in order to allow kinematic reconstruction of the events back to their origin at the scattering target. The detector system is protected from background radiation by a sophisticated shielding enclosure. The entire spectrometer is mounted on a rotating support structure which permits measurements to be taken with a large acceptance over laboratory scattering angles from 5.5° to 40°, thus allowing a wide range of low cross-section experiments to be conducted. These experiments complement and extend the previous Hall C research program to higher energies.",

keywords = "Electron calorimetry, Electron scattering, Magnetic spectrometer, Particle identification, Radiation shielding, Tracking detectors",

author = "S. Ali and A. Ahmidouch and Ambrose, \{G. R.\} and A. Asaturyan and Gayoso, \{C. Ayerbe\} and J. Benesch and V. Berdnikov and H. Bhatt and D. Bhetuwal and D. Biswas and P. Brindza and M. Bukhari and M. Burton and R. Carlini and M. Carmignotto and Christy, \{M. E.\} and C. Cotton and J. Crafts and D. Day and S. Danagoulian and A. Dittmann and Dongwi, \{D. H.\} and B. Duran and D. Dutta and R. Ent and H. Fenker and M. Fowler and D. Gaskell and A. Hamdi and N. Heinrich and W. Henry and N. Hlavin and T. Horn and Huber, \{G. M.\} and Y. Ilieva and J. Jarrell and S. Jia and Jones, \{M. K.\} and M. Junaid and Kabir, \{M. L.\} and N. Kalantarians and A. Karki and Kay, \{S. J.D.\} and Keppel, \{C. E.\} and V. Kumar and S. Lassiter and Li, \{W. B.\} and D. Mack and S. Malace and J. McMahon and A. Mkrtchyan and H. Mkrtchyan and P. Monaghan and C. Morean and P. Nadel-Turonski and G. Niculescu and Niculescu, \{M. I.\} and A. Nadeeshani and E. Pooser and A. Ramos and J. Reinhold and B. Sawatzky and H. Szumila-Vance and V. Tadevosyan and Trotta, \{R. L.\} and A. Usman and C. Yero and M. Yurov and S. Zhamkochyan and Wood, \{S. A.\} and J. Zhang",

note = "Publisher Copyright: {\textcopyright} 2025 The Authors",

year = "2026",

month = mar,

doi = "10.1016/j.nima.2025.171070",

language = "English",

volume = "1083",

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

issn = "0168-9002",

publisher = "Elsevier",

}

Ali, S, Ahmidouch, A, Ambrose, GR, Asaturyan, A, Gayoso, CA, Benesch, J, Berdnikov, V, Bhatt, H, Bhetuwal, D, Biswas, D, Brindza, P, Bukhari, M, Burton, M, Carlini, R, Carmignotto, M, Christy, ME, Cotton, C, Crafts, J, Day, D, Danagoulian, S, Dittmann, A, Dongwi, DH, Duran, B, Dutta, D, Ent, R, Fenker, H, Fowler, M, Gaskell, D, Hamdi, A, Heinrich, N, Henry, W, Hlavin, N, Horn, T, Huber, GM, Ilieva, Y, Jarrell, J, Jia, S, Jones, MK, Junaid, M, Kabir, ML, Kalantarians, N, Karki, A, Kay, SJD, Keppel, CE, Kumar, V, Lassiter, S, Li, WB, Mack, D, Malace, S, McMahon, J, Mkrtchyan, A, Mkrtchyan, H, Monaghan, P, Morean, C, Nadel-Turonski, P, Niculescu, G, Niculescu, MI, Nadeeshani, A, Pooser, E, Ramos, A, Reinhold, J, Sawatzky, B, Szumila-Vance, H, Tadevosyan, V, Trotta, RL, Usman, A, Yero, C, Yurov, M, Zhamkochyan, S, Wood, SA & Zhang, J 2026, 'The SHMS 11 GeV/c spectrometer in Hall C at Jefferson Lab', Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 1083, 171070. https://doi.org/10.1016/j.nima.2025.171070

TY - JOUR

T1 - The SHMS 11 GeV/c spectrometer in Hall C at Jefferson Lab

AU - Ali, S.

AU - Ahmidouch, A.

AU - Ambrose, G. R.

AU - Asaturyan, A.

AU - Gayoso, C. Ayerbe

AU - Benesch, J.

AU - Berdnikov, V.

AU - Bhatt, H.

AU - Bhetuwal, D.

AU - Biswas, D.

AU - Brindza, P.

AU - Bukhari, M.

AU - Burton, M.

AU - Carlini, R.

AU - Carmignotto, M.

AU - Christy, M. E.

AU - Cotton, C.

AU - Crafts, J.

AU - Day, D.

AU - Danagoulian, S.

AU - Dittmann, A.

AU - Dongwi, D. H.

AU - Duran, B.

AU - Dutta, D.

AU - Ent, R.

AU - Fenker, H.

AU - Fowler, M.

AU - Gaskell, D.

AU - Hamdi, A.

AU - Heinrich, N.

AU - Henry, W.

AU - Hlavin, N.

AU - Horn, T.

AU - Huber, G. M.

AU - Ilieva, Y.

AU - Jarrell, J.

AU - Jia, S.

AU - Jones, M. K.

AU - Junaid, M.

AU - Kabir, M. L.

AU - Kalantarians, N.

AU - Karki, A.

AU - Kay, S. J.D.

AU - Keppel, C. E.

AU - Kumar, V.

AU - Lassiter, S.

AU - Li, W. B.

AU - Mack, D.

AU - Malace, S.

AU - McMahon, J.

AU - Mkrtchyan, A.

AU - Mkrtchyan, H.

AU - Monaghan, P.

AU - Morean, C.

AU - Nadel-Turonski, P.

AU - Niculescu, G.

AU - Niculescu, M. I.

AU - Nadeeshani, A.

AU - Pooser, E.

AU - Ramos, A.

AU - Reinhold, J.

AU - Sawatzky, B.

AU - Szumila-Vance, H.

AU - Tadevosyan, V.

AU - Trotta, R. L.

AU - Usman, A.

AU - Yero, C.

AU - Yurov, M.

AU - Zhamkochyan, S.

AU - Wood, S. A.

AU - Zhang, J.

PY - 2026/3

Y1 - 2026/3

N2 - The Super High Momentum Spectrometer (SHMS) has been built for Hall C at the Thomas Jefferson National Accelerator Facility (Jefferson Lab). With a momentum capability reaching 11 GeV/c, the SHMS provides measurements of charged particles produced in electron-scattering experiments using the maximum available beam energy from the upgraded Jefferson Lab accelerator. The SHMS is an ion-optics magnetic spectrometer comprised of a series of new superconducting magnets which transport charged particles through an array of triggering, tracking, and particle-identification detectors that measure momentum, energy, angle and position in order to allow kinematic reconstruction of the events back to their origin at the scattering target. The detector system is protected from background radiation by a sophisticated shielding enclosure. The entire spectrometer is mounted on a rotating support structure which permits measurements to be taken with a large acceptance over laboratory scattering angles from 5.5° to 40°, thus allowing a wide range of low cross-section experiments to be conducted. These experiments complement and extend the previous Hall C research program to higher energies.

AB - The Super High Momentum Spectrometer (SHMS) has been built for Hall C at the Thomas Jefferson National Accelerator Facility (Jefferson Lab). With a momentum capability reaching 11 GeV/c, the SHMS provides measurements of charged particles produced in electron-scattering experiments using the maximum available beam energy from the upgraded Jefferson Lab accelerator. The SHMS is an ion-optics magnetic spectrometer comprised of a series of new superconducting magnets which transport charged particles through an array of triggering, tracking, and particle-identification detectors that measure momentum, energy, angle and position in order to allow kinematic reconstruction of the events back to their origin at the scattering target. The detector system is protected from background radiation by a sophisticated shielding enclosure. The entire spectrometer is mounted on a rotating support structure which permits measurements to be taken with a large acceptance over laboratory scattering angles from 5.5° to 40°, thus allowing a wide range of low cross-section experiments to be conducted. These experiments complement and extend the previous Hall C research program to higher energies.

KW - Electron calorimetry

KW - Electron scattering

KW - Magnetic spectrometer

KW - Particle identification

KW - Radiation shielding

KW - Tracking detectors

UR - https://www.scopus.com/pages/publications/105019232369

U2 - 10.1016/j.nima.2025.171070

DO - 10.1016/j.nima.2025.171070

M3 - Article

AN - SCOPUS:105019232369

SN - 0168-9002

VL - 1083

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 - 171070

ER -

The SHMS 11 GeV/c spectrometer in Hall C at Jefferson Lab

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Keywords

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