Measurement of the muon flux from 400 GeV/c protons interacting in a thick molybdenum/tungsten target

Abstract

The SHiP experiment is proposed to search for very weakly interacting particles beyond the Standard Model which are produced in a 400 GeV/c proton beam dump at the CERN SPS. About 10 ¹¹ muons per spill will be produced in the dump. To design the experiment such that the muon-induced background is minimized, a precise knowledge of the muon spectrum is required. To validate the muon flux generated by our Pythia and GEANT4 based Monte Carlo simulation (FairShip), we have measured the muon flux emanating from a SHiP-like target at the SPS. This target, consisting of 13 interaction lengths of slabs of molybdenum and tungsten, followed by a 2.4 m iron hadron absorber was placed in the H4 400 GeV/c proton beam line. To identify muons and to measure the momentum spectrum, a spectrometer instrumented with drift tubes and a muon tagger were used. During a 3-week period a dataset for analysis corresponding to (3.27±0.07)×1011 protons on target was recorded. This amounts to approximatively 1% of a SHiP spill.

Original language	English
Article number	284
Journal	European Physical Journal C
Volume	80
Issue number	3
DOIs	https://doi.org/10.1140/epjc/s10052-020-7788-y
Publication status	Published - 1 Mar 2020
Externally published	Yes

ASJC Scopus subject areas

Engineering (miscellaneous)
Physics and Astronomy (miscellaneous)

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10.1140/epjc/s10052-020-7788-y

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@article{2145a8be59fe48ac908686215d8c9d67,

title = "Measurement of the muon flux from 400 GeV/c protons interacting in a thick molybdenum/tungsten target",

abstract = "The SHiP experiment is proposed to search for very weakly interacting particles beyond the Standard Model which are produced in a 400 GeV/c proton beam dump at the CERN SPS. About 10 11 muons per spill will be produced in the dump. To design the experiment such that the muon-induced background is minimized, a precise knowledge of the muon spectrum is required. To validate the muon flux generated by our Pythia and GEANT4 based Monte Carlo simulation (FairShip), we have measured the muon flux emanating from a SHiP-like target at the SPS. This target, consisting of 13 interaction lengths of slabs of molybdenum and tungsten, followed by a 2.4 m iron hadron absorber was placed in the H4 400 GeV/c proton beam line. To identify muons and to measure the momentum spectrum, a spectrometer instrumented with drift tubes and a muon tagger were used. During a 3-week period a dataset for analysis corresponding to (3.27±0.07)×1011 protons on target was recorded. This amounts to approximatively 1% of a SHiP spill.",

author = "{The COMPASS Collaboration} and C. Ahdida and A. Akmete and R. Albanese and A. Alexandrov and A. Anokhina and S. Aoki and G. Arduini and E. Atkin and N. Azorskiy and Back, {J. J.} and A. Bagulya and Santos, {F. Baaltasar Dos} and A. Baranov and F. Bardou and Barker, {G. J.} and M. Battistin and J. Bauche and A. Bay and V. Bayliss and G. Bencivenni and Berdnikov, {A. Y.} and Berdnikov, {Y. A.} and M. Bertani and C. Betancourt and I. Bezshyiko and O. Bezshyyko and D. Bick and S. Bieschke and A. Blanco and J. Boehm and M. Bogomilov and I. Boiarska and K. Bondarenko and Bonivento, {W. M.} and J. Borburgh and A. Boyarsky and R. Brenner and D. Breton and V. B{\"u}scher and A. Buonaura and S. Buontempo and S. Cadeddu and A. Calcaterra and M. Calviani and M. Campanelli and M. Casolino and A. Chumakov and V. Kim and V. Lyubovitskij and A. Petrov",

note = "Funding Information: The SHiP Collaboration acknowledges support from the following Funding Agencies: the National Research Foundation of Korea (with Grant numbers of 2018R1A2B2007757, 2018R1D1A3B07050649, 2018R1D1A1B07050701, 2017R1D1A1B03036042, 2017R1A6A3A01075752, 2016R1A2B4012302, and 2016R1A6A3A11930680); the Russian Foundation for Basic Research (RFBR, Grant 17-02-00607) and the TAEK of Turkey. This work is supported by a Marie Sklodowska-Curie Innovative Training Network Fellowship of the European Commissions Horizon 2020 Programme under contract number 765710 INSIGHTS. We thank M. Al-Turany, F. Uhlig. S. Neubert and A. Gheata their assistance with FairRoot. We acknowledge G. Eulisse and P.A. Munkes for help with Alibuild. The measurements reported in this paper would not have been possible without a significant financial contribution from CERN. In addition, several member institutes made large financial and in-kind contributions to the construction of the target and the spectrometer sub detectors, as well as providing expert manpower for commissioning, data taking and analysis. This help is gratefully acknowledged. ",

year = "2020",

month = mar,

day = "1",

doi = "10.1140/epjc/s10052-020-7788-y",

language = "English",

volume = "80",

journal = "European Physical Journal C",

issn = "1434-6044",

publisher = "Springer New York",

number = "3",

}

TY - JOUR

T1 - Measurement of the muon flux from 400 GeV/c protons interacting in a thick molybdenum/tungsten target

AU - The COMPASS Collaboration

AU - Ahdida, C.

AU - Akmete, A.

AU - Albanese, R.

AU - Alexandrov, A.

AU - Anokhina, A.

AU - Aoki, S.

AU - Arduini, G.

AU - Atkin, E.

AU - Azorskiy, N.

AU - Back, J. J.

AU - Bagulya, A.

AU - Santos, F. Baaltasar Dos

AU - Baranov, A.

AU - Bardou, F.

AU - Barker, G. J.

AU - Battistin, M.

AU - Bauche, J.

AU - Bay, A.

AU - Bayliss, V.

AU - Bencivenni, G.

AU - Berdnikov, A. Y.

AU - Berdnikov, Y. A.

AU - Bertani, M.

AU - Betancourt, C.

AU - Bezshyiko, I.

AU - Bezshyyko, O.

AU - Bick, D.

AU - Bieschke, S.

AU - Blanco, A.

AU - Boehm, J.

AU - Bogomilov, M.

AU - Boiarska, I.

AU - Bondarenko, K.

AU - Bonivento, W. M.

AU - Borburgh, J.

AU - Boyarsky, A.

AU - Brenner, R.

AU - Breton, D.

AU - Büscher, V.

AU - Buonaura, A.

AU - Buontempo, S.

AU - Cadeddu, S.

AU - Calcaterra, A.

AU - Calviani, M.

AU - Campanelli, M.

AU - Casolino, M.

AU - Chumakov, A.

AU - Kim, V.

AU - Lyubovitskij, V.

AU - Petrov, A.

N1 - Funding Information: The SHiP Collaboration acknowledges support from the following Funding Agencies: the National Research Foundation of Korea (with Grant numbers of 2018R1A2B2007757, 2018R1D1A3B07050649, 2018R1D1A1B07050701, 2017R1D1A1B03036042, 2017R1A6A3A01075752, 2016R1A2B4012302, and 2016R1A6A3A11930680); the Russian Foundation for Basic Research (RFBR, Grant 17-02-00607) and the TAEK of Turkey. This work is supported by a Marie Sklodowska-Curie Innovative Training Network Fellowship of the European Commissions Horizon 2020 Programme under contract number 765710 INSIGHTS. We thank M. Al-Turany, F. Uhlig. S. Neubert and A. Gheata their assistance with FairRoot. We acknowledge G. Eulisse and P.A. Munkes for help with Alibuild. The measurements reported in this paper would not have been possible without a significant financial contribution from CERN. In addition, several member institutes made large financial and in-kind contributions to the construction of the target and the spectrometer sub detectors, as well as providing expert manpower for commissioning, data taking and analysis. This help is gratefully acknowledged.

PY - 2020/3/1

Y1 - 2020/3/1

N2 - The SHiP experiment is proposed to search for very weakly interacting particles beyond the Standard Model which are produced in a 400 GeV/c proton beam dump at the CERN SPS. About 10 11 muons per spill will be produced in the dump. To design the experiment such that the muon-induced background is minimized, a precise knowledge of the muon spectrum is required. To validate the muon flux generated by our Pythia and GEANT4 based Monte Carlo simulation (FairShip), we have measured the muon flux emanating from a SHiP-like target at the SPS. This target, consisting of 13 interaction lengths of slabs of molybdenum and tungsten, followed by a 2.4 m iron hadron absorber was placed in the H4 400 GeV/c proton beam line. To identify muons and to measure the momentum spectrum, a spectrometer instrumented with drift tubes and a muon tagger were used. During a 3-week period a dataset for analysis corresponding to (3.27±0.07)×1011 protons on target was recorded. This amounts to approximatively 1% of a SHiP spill.

AB - The SHiP experiment is proposed to search for very weakly interacting particles beyond the Standard Model which are produced in a 400 GeV/c proton beam dump at the CERN SPS. About 10 11 muons per spill will be produced in the dump. To design the experiment such that the muon-induced background is minimized, a precise knowledge of the muon spectrum is required. To validate the muon flux generated by our Pythia and GEANT4 based Monte Carlo simulation (FairShip), we have measured the muon flux emanating from a SHiP-like target at the SPS. This target, consisting of 13 interaction lengths of slabs of molybdenum and tungsten, followed by a 2.4 m iron hadron absorber was placed in the H4 400 GeV/c proton beam line. To identify muons and to measure the momentum spectrum, a spectrometer instrumented with drift tubes and a muon tagger were used. During a 3-week period a dataset for analysis corresponding to (3.27±0.07)×1011 protons on target was recorded. This amounts to approximatively 1% of a SHiP spill.

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U2 - 10.1140/epjc/s10052-020-7788-y

DO - 10.1140/epjc/s10052-020-7788-y

M3 - Article

AN - SCOPUS:85082825897

VL - 80

JO - European Physical Journal C

JF - European Physical Journal C

SN - 1434-6044

IS - 3

M1 - 284

ER -