Study of light backgrounds from relativistic electrons in air light-guides

S. Riordan, Y. X. Zhao, S. Baunack, D. Becker, C. Clarke, K. Dehmelt, A. Deshpande, M. Gericke, B. Gläser, K. Imai, T. Kutz, F. E. Maas, D. McNulty, J. Pan, S. Park, S. Rahman, Paul A Souder, P. Wang, B. Wellman, K. S. Kumar

Research output: Contribution to journalArticle

Abstract

The MOLLER experiment proposed at the Thomas Jefferson National Accelerator Facility plans a precision low energy determination of the weak mixing angle via the measurement of the parity-violating asymmetry in the scattering of high energy longitudinally polarized electrons from electrons bound in a liquid hydrogen target (Møller scattering). A relative measure of the scattering rate is planned to be obtained by intercepting the Møller scattered electrons with a circular array of thin fused silica tiles attached to air light guides, which facilitate the transport of Cherenkov photons generated within the tiles to photomultiplier tubes (PMTs). The scattered flux will also pass through the light guides of downstream tiles, generating additional Cherenkov as well as scintillation light and is a potential background. In order to estimate the rate of these backgrounds, a gas-filled tube detector was designed and deployed in an electron beam at the MAMI facility at Johannes Gutenberg University, Mainz, Germany. Described in this paper is the design of a detector to measure separately the scintillation and Cherenkov responses of gas mixtures from relativistic electrons, the results of studies of several gas mixtures with comparisons to simulations, and conclusions about the implications for the design of the MOLLER detector apparatus.

Original languageEnglish (US)
Pages (from-to)96-102
Number of pages7
JournalNuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Volume896
DOIs
StatePublished - Jul 11 2018

Fingerprint

tiles
Tile
Electrons
air
Scintillation
Scattering
Air
Detectors
Gas mixtures
scintillation
gas mixtures
detectors
electrons
scattering
liquid hydrogen
Photomultipliers
photomultiplier tubes
Fused silica
Germany
Particle accelerators

Keywords

  • Beam test
  • Cherenkov
  • Gas scintillation
  • Geant4 simulation
  • MOLLER project

ASJC Scopus subject areas

  • Nuclear and High Energy Physics
  • Instrumentation

Cite this

Study of light backgrounds from relativistic electrons in air light-guides. / Riordan, S.; Zhao, Y. X.; Baunack, S.; Becker, D.; Clarke, C.; Dehmelt, K.; Deshpande, A.; Gericke, M.; Gläser, B.; Imai, K.; Kutz, T.; Maas, F. E.; McNulty, D.; Pan, J.; Park, S.; Rahman, S.; Souder, Paul A; Wang, P.; Wellman, B.; Kumar, K. S.

In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 896, 11.07.2018, p. 96-102.

Research output: Contribution to journalArticle

Riordan, S, Zhao, YX, Baunack, S, Becker, D, Clarke, C, Dehmelt, K, Deshpande, A, Gericke, M, Gläser, B, Imai, K, Kutz, T, Maas, FE, McNulty, D, Pan, J, Park, S, Rahman, S, Souder, PA, Wang, P, Wellman, B & Kumar, KS 2018, 'Study of light backgrounds from relativistic electrons in air light-guides', Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, vol. 896, pp. 96-102. https://doi.org/10.1016/j.nima.2018.04.029
Riordan, S. ; Zhao, Y. X. ; Baunack, S. ; Becker, D. ; Clarke, C. ; Dehmelt, K. ; Deshpande, A. ; Gericke, M. ; Gläser, B. ; Imai, K. ; Kutz, T. ; Maas, F. E. ; McNulty, D. ; Pan, J. ; Park, S. ; Rahman, S. ; Souder, Paul A ; Wang, P. ; Wellman, B. ; Kumar, K. S. / Study of light backgrounds from relativistic electrons in air light-guides. In: Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 2018 ; Vol. 896. pp. 96-102.
@article{54b75d26f4744a289cf69aebf208fca2,
title = "Study of light backgrounds from relativistic electrons in air light-guides",
abstract = "The MOLLER experiment proposed at the Thomas Jefferson National Accelerator Facility plans a precision low energy determination of the weak mixing angle via the measurement of the parity-violating asymmetry in the scattering of high energy longitudinally polarized electrons from electrons bound in a liquid hydrogen target (M{\o}ller scattering). A relative measure of the scattering rate is planned to be obtained by intercepting the M{\o}ller scattered electrons with a circular array of thin fused silica tiles attached to air light guides, which facilitate the transport of Cherenkov photons generated within the tiles to photomultiplier tubes (PMTs). The scattered flux will also pass through the light guides of downstream tiles, generating additional Cherenkov as well as scintillation light and is a potential background. In order to estimate the rate of these backgrounds, a gas-filled tube detector was designed and deployed in an electron beam at the MAMI facility at Johannes Gutenberg University, Mainz, Germany. Described in this paper is the design of a detector to measure separately the scintillation and Cherenkov responses of gas mixtures from relativistic electrons, the results of studies of several gas mixtures with comparisons to simulations, and conclusions about the implications for the design of the MOLLER detector apparatus.",
keywords = "Beam test, Cherenkov, Gas scintillation, Geant4 simulation, MOLLER project",
author = "S. Riordan and Zhao, {Y. X.} and S. Baunack and D. Becker and C. Clarke and K. Dehmelt and A. Deshpande and M. Gericke and B. Gl{\"a}ser and K. Imai and T. Kutz and Maas, {F. E.} and D. McNulty and J. Pan and S. Park and S. Rahman and Souder, {Paul A} and P. Wang and B. Wellman and Kumar, {K. S.}",
year = "2018",
month = "7",
day = "11",
doi = "10.1016/j.nima.2018.04.029",
language = "English (US)",
volume = "896",
pages = "96--102",
journal = "Nuclear Instruments and Methods in Physics Research, Section A: Accelerators, Spectrometers, Detectors and Associated Equipment",
issn = "0168-9002",
publisher = "Elsevier",

}

TY - JOUR

T1 - Study of light backgrounds from relativistic electrons in air light-guides

AU - Riordan, S.

AU - Zhao, Y. X.

AU - Baunack, S.

AU - Becker, D.

AU - Clarke, C.

AU - Dehmelt, K.

AU - Deshpande, A.

AU - Gericke, M.

AU - Gläser, B.

AU - Imai, K.

AU - Kutz, T.

AU - Maas, F. E.

AU - McNulty, D.

AU - Pan, J.

AU - Park, S.

AU - Rahman, S.

AU - Souder, Paul A

AU - Wang, P.

AU - Wellman, B.

AU - Kumar, K. S.

PY - 2018/7/11

Y1 - 2018/7/11

N2 - The MOLLER experiment proposed at the Thomas Jefferson National Accelerator Facility plans a precision low energy determination of the weak mixing angle via the measurement of the parity-violating asymmetry in the scattering of high energy longitudinally polarized electrons from electrons bound in a liquid hydrogen target (Møller scattering). A relative measure of the scattering rate is planned to be obtained by intercepting the Møller scattered electrons with a circular array of thin fused silica tiles attached to air light guides, which facilitate the transport of Cherenkov photons generated within the tiles to photomultiplier tubes (PMTs). The scattered flux will also pass through the light guides of downstream tiles, generating additional Cherenkov as well as scintillation light and is a potential background. In order to estimate the rate of these backgrounds, a gas-filled tube detector was designed and deployed in an electron beam at the MAMI facility at Johannes Gutenberg University, Mainz, Germany. Described in this paper is the design of a detector to measure separately the scintillation and Cherenkov responses of gas mixtures from relativistic electrons, the results of studies of several gas mixtures with comparisons to simulations, and conclusions about the implications for the design of the MOLLER detector apparatus.

AB - The MOLLER experiment proposed at the Thomas Jefferson National Accelerator Facility plans a precision low energy determination of the weak mixing angle via the measurement of the parity-violating asymmetry in the scattering of high energy longitudinally polarized electrons from electrons bound in a liquid hydrogen target (Møller scattering). A relative measure of the scattering rate is planned to be obtained by intercepting the Møller scattered electrons with a circular array of thin fused silica tiles attached to air light guides, which facilitate the transport of Cherenkov photons generated within the tiles to photomultiplier tubes (PMTs). The scattered flux will also pass through the light guides of downstream tiles, generating additional Cherenkov as well as scintillation light and is a potential background. In order to estimate the rate of these backgrounds, a gas-filled tube detector was designed and deployed in an electron beam at the MAMI facility at Johannes Gutenberg University, Mainz, Germany. Described in this paper is the design of a detector to measure separately the scintillation and Cherenkov responses of gas mixtures from relativistic electrons, the results of studies of several gas mixtures with comparisons to simulations, and conclusions about the implications for the design of the MOLLER detector apparatus.

KW - Beam test

KW - Cherenkov

KW - Gas scintillation

KW - Geant4 simulation

KW - MOLLER project

UR - http://www.scopus.com/inward/record.url?scp=85046447201&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85046447201&partnerID=8YFLogxK

U2 - 10.1016/j.nima.2018.04.029

DO - 10.1016/j.nima.2018.04.029

M3 - Article

AN - SCOPUS:85046447201

VL - 896

SP - 96

EP - 102

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

SN - 0168-9002

ER -