Optimization of neutron shielding for the PICASSO experiment

S. Archambault, F. Aubin, M. Auger, E. Behnke, B. Beltran, B. Biskup, K. Clark, X. Dai, A. Davour, J. Farine, M. H. Genest, G. Giroux, R. Gornea, R. Faust, C. Krauss, I. Lawson, C. Leroy, C. Levy, L. Lessard, I. LevineJ. P. Martin, S. Kumaratunga, R. MacDonald, P. Nadeau, A. Noble, M. C. Piro, S. Pospisil, T. Shepherd, J. Sodomka, N. Starinski, I. Stekl, C. Storey, U. Wichoski, V. Zacek

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

Abstract

The PICASSO experiment searches WIMPs via their spin-dependent interactions with nuclei. At their operating temperatures, PICASSO threshold detectors are not sensitive to γ-rays, while it is necessary to suppress neutron and α-ray backgrounds. The different types of neutron shielding (water, polyethylene, borated water and polyethylene doped with different compounds of boron and lithium) were studied via the Monte Carlo method using MCNPX code. Efficiencies of these different types of neutron shielding were compared from the point of view of neutron suppression as well as number of newly born y-rays. The neutrons and γ-rays were followed up to the PICASSO detector active material. The most suitable neutron shielding for the PICASSO experiment was determined following these simulations.

Original languageEnglish (US)
Title of host publicationWorkshop on Calculation of Double-Beta-Decay Matrix Elements (MEDEX '09)
Pages112-116
Number of pages5
DOIs
StatePublished - Dec 14 2009
EventWorkshop on Calculation of Double-Beta-Decay Matrix Elements, MEDEX '09 - Prague, Czech Republic
Duration: Jun 15 2009Jun 19 2009

Publication series

NameAIP Conference Proceedings
Volume1180
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

OtherWorkshop on Calculation of Double-Beta-Decay Matrix Elements, MEDEX '09
CountryCzech Republic
CityPrague
Period6/15/096/19/09

Keywords

  • Dark matter
  • MCNPX
  • Monte Carlo simulations
  • Neutralino
  • Neutron shielding

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