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Demonstration of surface electron rejection with interleaved germanium detectors for dark matter searches

Agnese, R. and Cornell, B. D. and Golwala, S. R. and Moore, D. C. and Nelson, R. H. (2013) Demonstration of surface electron rejection with interleaved germanium detectors for dark matter searches. Applied Physics Letters, 103 (16). Art. No. 164105. ISSN 0003-6951. doi:10.1063/1.4826093.

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The SuperCDMS experiment in the Soudan Underground Laboratory searches for dark matter with a 9-kg array of cryogenic germanium detectors. Symmetric sensors on opposite sides measure both charge and phonons from each particle interaction, providing excellent discrimination between electron and nuclear recoils, and between surface and interior events. Surface event rejection capabilities were tested with two ^(210)Pb sources producing ∼130 beta decays/hr. In ∼800 live hours, no events leaked into the 8–115 keV signal region, giving upper limit leakage fraction 1.7 × 10^(−5) at 90% C.L., corresponding to < 0.6 surface event background in the future 200-kg SuperCDMS SNOLAB experiment.

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Golwala, S. R.0000-0002-1098-7174
Additional Information:© 2013 AIP Publishing LLC. Received 26 September 2013; accepted 2 October 2013; published online 17 October 2013. The SuperCDMS collaboration gratefully acknowledges the technical assistance from Jim Beaty and the staff of the Soudan Underground Laboratory and the Minnesota Department of Natural Resources. These iZIP detectors are fabricated in the Stanford Nanofabrication Facility, which is a member of the National Nanofabrication Infrastructure Network sponsored by NSF under Grant ECS-0335765. This work is supported in part by the National Science Foundation (Grant Nos. AST-9978911, NSF-0847342, PHY-1102795, NSF-1151869, PHY-0542066, PHY-0503729, PHY-0503629, PHY-0503641, PHY-0504224, PHY-0705052, PHY-0801708, PHY-0801712, PHY-0802575, PHY-0847342, PHY-0855299, PHY-0855525, and PHY-1205898), by the Department of Energy (Contract Nos. DE-AC03-76SF00098, DE-FG02-92ER40701, DE-FG02-94ER40823, DE-FG03-90ER40569, DE-FG03-91ER40618, and DE-SC0004022), by NSERC Canada (Grant Nos. SAPIN 341314 and SAPPJ 386399), and by MULTIDARK CSD2009-00064 and FPA2012-34694. Fermilab is operated by Fermi Research Alliance, LLC under Contract No. De-AC02-07CH11359, while SLAC is operated under Contract No. DE-AC02-76SF00515 with the United States Department of Energy.
Funding AgencyGrant Number
Department of Energy (DOE)DE-AC03- 76SF00098
Department of Energy (DOE)DE-FG02-92ER40701
Department of Energy (DOE)DE-FG02-94ER40823
Department of Energy (DOE)DE-FG03-90ER40569
Department of Energy (DOE)DE-FG03-91ER40618
Department of Energy (DOE)DE-SC0004022
Natural Sciences and Engineering Research Council of Canada (NSERC)SAPIN 341314
Natural Sciences and Engineering Research Council of Canada (NSERC)SAPPJ 386399
Department of Energy (DOE)DE-AC02-07CH11359
Department of Energy (DOE)DE-AC02-76SF00515
Issue or Number:16
Record Number:CaltechAUTHORS:20131121-150215822
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Official Citation:Demonstration of surface electron rejection with interleaved germanium detectors for dark matter searches R. Agnese , A. J. Anderson , D. Balakishiyeva , R. Basu Thakur , D. A. Bauer , A. Borgland , D. Brandt , P. L. Brink , R. Bunker , B. Cabrera , D. O. Caldwell , D. G. Cerdeno , H. Chagani , M. Cherry , J. Cooley , B. Cornell , C. H. Crewdson , P. Cushman , M. Daal , P. C. F. Di Stefano , E. Do Couto E Silva , T. Doughty , L. Esteban , S. Fallows , E. Figueroa-Feliciano , J. Fox , M. Fritts , G. L. Godfrey , S. R. Golwala , J. Hall , H. R. Harris , J. Hasi , S. A. Hertel , B. A. Hines , T. Hofer , D. Holmgren , L. Hsu , M. E. Huber , A. Jastram , O. Kamaev , B. Kara , M. H. Kelsey , S. A. Kenany , A. Kennedy , C. J. Kenney , M. Kiveni , K. Koch , B. Loer , E. Lopez Asamar , R. Mahapatra , V. Mandic , C. Martinez , K. A. McCarthy , N. Mirabolfathi , R. A. Moffatt , D. C. Moore , P. Nadeau , R. H. Nelson , L. Novak , K. Page , R. Partridge , M. Pepin , A. Phipps , K. Prasad , M. Pyle , H. Qiu , R. Radpour , W. Rau , P. Redl , A. Reisetter , R. W. Resch , Y. Ricci , T. Saab , B. Sadoulet , J. Sander , R. Schmitt , K. Schneck , R. W. Schnee , S. Scorza , D. Seitz , B. Serfass , B. Shank , D. Speller , A. Tomada , A. N. Villano , B. Welliver , D. H. Wright , S. Yellin , J. J. Yen , B. A. Young , J. Zhang and The SuperCDMS Collaboration Appl. Phys. Lett. 103, 164105 (2013);
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ID Code:42632
Deposited By: Ruth Sustaita
Deposited On:21 Nov 2013 23:47
Last Modified:10 Nov 2021 16:26

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