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26 April 2024

» arxiv » 1204.6218

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Light Yield in DarkSide-10: a Prototype Two-phase Liquid Argon TPC for Dark Matter Searches
D. Akimov ; T. Alexander ; D. Alton ; K. Arisaka ; H.O. Back ; P. Beltrame ; J. Benziger ; A. Bolozdynya ; G. Bonfini ; A. Brigatti ; J. Brodsky ; L. Cadonati ; F. Calaprice ; A. Candela ; H. Cao ; P. Cavalcante ; A. Chavarria ; A. Chepurnov ; S. Chidzik ; D. Cline ; A.G. Cocco ; C. Condon ; D. D'Angelo ; S. Davini ; E. De Haas ; A. Derbin ; G. Di Pietro ; I. Dratchnev ; D. Durben ; A. Empl ; A. Etenko ; A. Fan ; G. Fiorillo ; K. Fomenko ; F. Gabriele ; C. Galbiati ; S. Gazzana ; C. Ghag ; C. Ghiano ; A. Goretti ; L. Grandi ; M. Gromov ; M. Guan ; C. Guo ; G. Guray ; E. V. Hungerford ; Al. Ianni ; An. Ianni ; A. Kayunov ; K. Keeter ; C. Kendziora ; S. Kidner ; V. Kobychev ; G. Koh ; D. Korablev ; G. Korga ; E. Shields ; P. Li ; B. Loer ; P. Lombardi ; C. Love ; L. Ludhova ; L. Lukyanchenko ; A. Lund ; K. Lung ; Y. Ma ; I. Machulin ; J. Maricic ; C.J. Martoff ; Y. Meng ; E. Meroni ; P.D. Meyers ; T. Mohayai ; D. Montanari ; M. Montuschi ; P. Mosteiro ; B. Mount ; V. Muratova ; A. Nelson ; A. Nemtzow ; N. Nurakhov ; M. Orsini ; F. Ortica ; M. Pallavicini ; E. Pantic ; S. Parmeggiano ; R. Parsells ; N. Pelliccia ; L. Perasso ; F. Perfetto ; L. Pinsky ; A. Pocar ; S. Pordes ; G. Ranucci ; A. Razeto ; A. Romani ; N. Rossi ; P. Saggese ; R. Saldanha ; C. Salvo ; W. Sands ; M. Seigar ; D. Semenov ; M. Skorokhvatov ; O. Smirnov ; A. Sotnikov ; S. Sukhotin ; Y. Suvorov ; R. Tartaglia ; J. Tatarowicz ; G. Testera ; A. Teymourian ; J. Thompson ; E. Unzhakov ; R.B. Vogelaar ; H. Wang ; S. Westerdale ; M. Wojcik ; A. Wright ; J. Xu ; C. Yang ; S. Zavatarelli ; M. Zehfus ; W. Zhong ; G. Zuzel ;
Date:	27 Apr 2012
Abstract:	As part of the DarkSide program of direct dark matter searches using liquid argon TPCs, a prototype detector with an active volume containing 10 kg of liquid argon, DarkSide-10, was built and operated underground in the Gran Sasso National Laboratory in Italy. A critically important parameter for such devices is the scintillation light yield, as photon statistics limits the rejection of electron-recoil backgrounds by pulse shape discrimination. We have measured the light yield of DarkSide-10 using the readily-identifiable full-absorption peaks from gamma ray sources combined with single-photoelectron calibrations using low-occupancy laser pulses. For gamma lines of energies in the range 122-1275 keV, we get consistent light yields averaging 8.887pm0.003(stat)pm0.444(sys) p.e./keV_ee. With additional purification, the light yield measured at 511 keV increased to 9.142pm0.006(stat) p.e./keV_ee.
Source:	arXiv, 1204.6218
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