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Contribution Poster 0vbb

Poster (participating in poster prize competition)

Radon Background Mitigation for the SuperNEMO Experiment


  • Ms. Fang XIE
  • Mr. Christophe HUGON

Primary authors

Authorship annotation

on behalf of the SuperNEMO collaboration

Session and Location

Monday Session, Poster Wall #63 (Auditorium Gallery Right)

Abstract content

SuperNEMO is a tracker-calorimeter neutrinoless double beta decay experiment using $^{82}$Se to reach a sensitivity of T${1/2} > 10^{26}$~y, and the effective neutrino mass of $\langle m{\beta\beta}\rangle<40-100$~meV. The construction of the first Demonstrator Module at the LSM is under completion, with the aim to reach 0 background in the ROI of the $0\nu\beta\beta$ decay. This target placed challenging demands on the radiopurity of detector components, and particularly the $^{222}$Rn activity within the tracker. A ``Radon Concentration Line'' was developed and operated in conjunction with a electrostatic detector to measure $^{222}$Rn content in gas to a few $\mu$Bq/m$^3$. Measurements of an instrumented tracker have confirmed that the target of $0.15$ mBq/m$^3$ of radon has been met. In addition, studies of radon emanation in the presence of tracking gas quenchers, have been carried out. The poster will present the design of radon emanation facilities and measurement results.

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