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Physics > Instrumentation and Detectors

Title: The BiPo-3 detector for the measurement of ultra low natural radioactivities of thin materials

Authors: A.S. Barabash, A. Basharina-Freshville, E. Birdsall, S. Blondel, S. Blot, M. Bongrand, D. Boursette, V. Brudanin, J. Busto, A.J. Caffrey, S. Calvez, M. Cascella, S. Cebrián, C. Cerna, J.P Cesar, E. Chauveau, A. Chopra, T. Dafní, S.De Capua, D. Duchesneau, D. Durand, V. Egorov, G. Eurin, J.J. Evans, L. Fajt, D. Filosofov, R. Flack, X. Garrido, H. Gómez, B. Guillon, P. Guzowski, K. Holý, R. Hodák, A. Huber, C. Hugon, F.J. Iguaz, I.G. Irastorza, A. Jeremie, S. Jullian, M. Kauer, A. Klimenko, O. Kochetov, S.I. Konovalov, V. Kovalenko, K. Lang, Y. Lemière, T. Le Noblet, Z. Liptak, X.R. Liu, P. Loaiza, G. Lutter, G. Luzón, M. Macko, F. Mamedov, C. Marquet, F. Mauger, B. Morgan, J. Mott, I. Nemchenok, M. Nomachi, F. Nova, H. Ohsumi, G. Oliviéro A. Ortiz de Solórzano, et al. (33 additional authors not shown)
Abstract: The BiPo-3 detector, running in the Canfranc Underground Laboratory (Laboratorio Subterr\'aneo de Canfranc, LSC, Spain) since 2013, is a low-radioactivity detector dedicated to measuring ultra low natural radionuclide contaminations of $^{208}$Tl ($^{232}$Th chain) and $^{214}$Bi ($^{238}$U chain) in thin materials. The total sensitive surface area of the detector is 3.6 m$^2$. The detector has been developed to measure radiopurity of the selenium double $\beta$-decay source foils of the SuperNEMO experiment. In this paper the design and performance of the detector, and results of the background measurements in $^{208}$Tl and $^{214}$Bi, are presented, and validation of the BiPo-3 measurement with a calibrated aluminium foil is discussed. Results of the $^{208}$Tl and $^{214}$Bi activity measurements of the first enriched $^{82}$Se foils of the double $\beta$-decay SuperNEMO experiment are reported. The sensitivity of the BiPo-3 detector for the measurement of the SuperNEMO $^{82}$Se foils is $\mathcal{A}$($^{208}$Tl) $<2$ $\mu$Bq/kg (90\% C.L.) and $\mathcal{A}$($^{214}$Bi) $<140$ $\mu$Bq/kg (90\% C.L.) after 6 months of measurement.
Comments: 37 pages, 29 figures
Subjects: Instrumentation and Detectors (physics.ins-det)
Journal reference: JINST 12 (2017) P06002
DOI: 10.1088/1748-0221/12/06/P06002
Cite as: arXiv:1702.07176 [physics.ins-det]
  (or arXiv:1702.07176v2 [physics.ins-det] for this version)

Submission history

From: Pia Loaiza [view email]
[v1] Thu, 23 Feb 2017 11:12:06 GMT (3304kb,D)
[v2] Wed, 7 Jun 2017 14:06:25 GMT (3126kb,D)