Muon-induced background in the EDELWEISS dark matter search

Schmidt, B.; Armengaud, E.; Augier, C.; Benoı̂t, A.; Bergé, L.; Bergmann, T.; Blümer, J.; Brès, Guillaume A.; Broniatowski, A.; Brudanin, V.; Censier, B.; Chapellier, M.; Charlieux, F.; Collin, Sophie; Coulter, P.; Cox, G. A.; Crauste, O.; Domange, J.; Dumoulin, L.; Eitel, K.; Filosofov, D.; Fourches, N.; Garde, G.; Gascon, J.; Gerbier, G.; Gros, M.; Hehn, L.; Henry, S.; Hervé, S.; Heuermann, G.; Juillard, A.; Kluck, H.; Козлов, В.; Kleifges, M.; Kraus, H.; Kudryavtsev, V. A.; Loaiza, P.; Marnieros, S.; Menshikov, Alexander; Navick, X.F.; Nieder, Holger; Nones, C.; Olivieri, E.; Pari, P.; Paul, Biswajit; Robinson, M.; Rodenas, H.; Rozov, S.; Sanglard, V.; Siebenborn, B.; Tcherniakhovski, D.; Torrento-Coello, A. S.; Vagneron, L.; Walker, R. J.; Weber, M.; Yakushev, E.; Zhang, X.

doi:10.1016/j.astropartphys.2013.01.014

Cited by 45 publications

(31 citation statements)

References 31 publications

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“…Because muons can produce spallation neutrons that can produce scintillation signals in a crystal detector and could mimic those expected for dark matter particles. It is essential to understand muon and muon-induced events in direct dark matter search experiments [3,4].…”

Section: Introductionmentioning

confidence: 99%

Muon detector for the COSINE-100 experiment

Prihtiadi

Adhikari

et al. 2018

J. Inst.

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The COSINE-100 dark matter search experiment has started taking physics data with the goal of performing an independent measurement of the annual modulation signal observed by DAMA/LIBRA. A muon detector was constructed by using plastic scintillator panels in the outermost layer of the shield surrounding the COSINE-100 detector. It is used to detect cosmic ray muons in order to understand the impact of the muon annual modulation on dark matter analysis. Assembly and initial performance test of each module have been performed at a ground laboratory. The installation of the detector in Yangyang Underground Laboratory (Y2L) was completed in the summer of 2016. Using three months of data, the muon underground flux was measured to be 328 ± 1(stat.)± 10(syst.) muons/m 2 /day. In this report, the assembly of the muon detector and the results from the analysis are presented.

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Section: Introductionmentioning

confidence: 99%

Muon detector for the COSINE-100 experiment

Prihtiadi

Adhikari

et al. 2018

J. Inst.

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“…Measurements from [16] Malczewski et al (2012), show the gamma ray flux in the LSM within the energy range 7.4-2734.2 keV to vary within 0.301 − 0.622 ߛ cm -2 s -1 as one moves closer to the walls. Low numbers of cosmic muons penetrate into underground laboratories, with a vertical flux of ߶ ఓ = 5.4 ± 0.2 m ିଶ day ିଵ [12], where they pose a problem for dark matter search experiments by creating secondary neutrons [13,14]. Thermal neutrons are also present in the LSM from spontaneous fission and (ߙ, ݊) reactions, yielding ߶ = 1.9 × 10 ି cm ିଶ s ିଵ [15].…”

Section: Introductionmentioning

confidence: 99%

Background study of absorbed dose in biological experiments at the Modane Underground Laboratory

et al. 2016

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Abstract. Aiming to explore how biological systems respond to ultra-low background environments, we report here our background studies for biological experiments in the Modane Underground Laboratory. We find that the minimum radioactive background for biology experiments is limited by the potassium content of the biological sample itself, coming from its nutritive medium, which we find in our experimental set-up to be 26 nGy hr -1 . Compared to our reference radiation environment in Clermont-Ferrand, biological experiments can be conducted in the Modane laboratory with a radiation background 8.2 times lower than the reference above-ground level. As the radiation background may be further reduced by using different nutritive media, we also provide measurements of the potassium concentration by gamma spectroscopy of yeast extract (63.3 ± 1.2 mg g -1 ) and tryptone (2.5 ± 0.2 mg g -1 ) in order to guide media selection in future experiments.Afin d'examiner la manière avec laquelle les systèmes biologiques répondent aux environnements caractérisés par un bas niveau de radioactivité, nous avons mesuré le bruit de fond des expériences de biologie menées au Laboratoire Souterrain de Modane. Nous montrons que le bruit de fond est limité par le contenu en potassium au travers des échantillons biologiques euxmêmes, dans leurs milieux nutritifs. Dans le cadre des expériences examinées ici, le bruit de fond de potassium contribue à hauteur de 26 nGy hr -1 . Par rapport à notre environnement de référence à Clermont-Ferrand, des expériences biologiques peuvent être conduites dans le laboratoire souterrain avec une réduction du bruit de fond de 8.2 fois le niveau de la surface. Du fait que le milieu nutritif apporte le plus grand impact au bruit de fond radiatif, nous recommandons la mesure par spectrométrie gamma de la concentration de potassium dans l'extrait de levure (63.3 ± 1.2 mg g -1 ) et le tryptone (2.5 ± 0.2 mg g -1 ) afin de guider la sélection du milieu des futures expériences.

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“…In addition to the TOF technique, the recoil energy of ions in liquid scintillators can represent the energy of incident neutrons if the detector response to nuclear recoils is well understood with a Monte Carlo simulation. The EDELWEISS dark matter search experiment reported the measurements of Germanium recoils in coincidence with muon signals in scintillators [27]. The neutron-induced recoils have energies up to 60 keV, corresponding to neutron energies up to GeV, depending on the scattering angle.…”

Section: Introductionmentioning

confidence: 99%

Measuring muon-induced neutrons with liquid scintillation detector at Soudan mine

Zhang

Mei

2014

Phys. Rev. D

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We report a direct detection of muon-induced high energy neutrons with a 12-liter neutron detector fabricated with EJ-301 liquid scintillator operating at Soudan Mine for about two years. The detector response to energy from a few MeV up to ∼ 20 MeV has been calibrated using radioactive sources and cosmic-ray muons. Subsequently, we have calculated the scintillation efficiency for nuclear recoils, up to a few hundred MeV, using Birks' law in the Monte Carlo simulation. Data from an exposure of 655.1 days were analyzed and neutron-induced recoil events were observed in the energy region from 4 MeV to 50 MeV, corresponding to fast neutrons with kinetic energy up to a few hundred MeV, depending on the scattering angle. Combining with the Monte Carlo simulation, the measured muon-induced fast neutron flux is determined to be (2.23 ± 0.52(sta.) ± 0.99(sys.)) × 10 −9 cm −2 s −1 (En > 20 MeV), in a reasonable agreement with the model prediction. The muon flux is found to be (1.65 ± 0.02(sta.) ± 0.1(sys.)) × 10 −7 cm −2 s −1 (Eµ > 1 GeV), consistent with other measurements. As a result, the muon-induced high energy gamma-ray flux is simulated to be 7.08 ×10 −7 cm −2 s −1 (Eγ > 1 MeV) for the depth of Soudan.

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Muon-induced background in the EDELWEISS dark matter search

Cited by 45 publications

References 31 publications

Muon detector for the COSINE-100 experiment

Muon detector for the COSINE-100 experiment

Background study of absorbed dose in biological experiments at the Modane Underground Laboratory

Measuring muon-induced neutrons with liquid scintillation detector at Soudan mine

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