The DarkSide-50 outer detectors

[摘要] DarkSide-50 is a dark matter detection experiment searching for Weakly Interacting Massive Particles (WIMPs), in Gran Sasso National Laboratory. For experiments like DarkSide-50, neutrons are one of the primary backgrounds that can mimic WIMP signals. The experiment consists of three nested detectors: a liquid argon time projection chamber surrounded by two outer detectors. The outermost detector is a 10 m by 11 m cylindrical water Cherenkov detector with 80 PMTs, designed to provide shielding and muon vetoing. Inside the water Cherenkov detector is the 4 m diameter spherical boron-loaded liquid scintillator veto, with a cocktail of pseudocumene, trimethyl borate, and PPO wavelength shifter, designed to provide shielding, neutron vetoing, and in situ measurements of the TPC backgrounds. We present design and performance details of the DarkSide-50 outer detectors.

[发布机构] APC, Université Paris Diderot, CNRS/IN2P3, CEA/Irfu, Obs de Paris, Sorbonne Paris Cité, 75205 Paris, France^1;LPNHE Paris, Université Pierre et Marie Curie, Université Paris Diderot, CNRS/IN2P3, Paris; 75252, France^2;Department of Physics, Princeton University, Princeton; NJ; 08544, United States^3;Instituto de Física, Universitade de São Paulo, Sao Paulo; 05508-090, Brazil^4;Amherst Center for Fundamental Interactions, Department of Physics, University of Massachusetts, Amherst; MA; 01003, United States^5;Fermi National Accelerator Laboratory, Batavia; IL; 60510, United States^6;Department of Physics, Augustana University, Sioux Falls; SD; 57197, United States^7;Department of Physics and Astronomy, University of California, Los Angeles; CA; 90095, United States^8;Pacific Northwest National Laboratory, Richland; WA; 99354, United States; (10) Laboratori Nazionali Del Gran Sasso, Assergi AQ; 67010, Italy; (11) Gran Sasso Science Institute, L'AQUILA; 67100, Italy; (12) Department of Physics, Università degli Studi, Genova; 16146, Italy; (13) Istituto Nazionale di Fisica Nucleare, Sezione di Genova, Genova; 16146, Italy; (14) Istituto Nazionale di Fisica Nucleare, Sezione di Milano, Milano; 20133, Italy; (15) Istituto Nazionale di Fisica Nucleare, Sezione di Roma Tre, Roma; 00146, Italy; (16) Department of Physics and Mathematics, Università degli Studi Roma Tre, Roma; 00146, Italy; (17) Department of Physics, Università degli Studi, Cagliari; 09042, Italy; (18) Istituto Nazionale di Fisica Nucleare, Sezione di Cagliari, Cagliari; 09042, Italy; (19) Department of Physics, University of Houston, Houston; TX; 77204, United States; (20) Istituto Nazionale di Fisica Nucleare, Sezione di Napoli, Napoli; 80126, Italy; (21) Department of Physics, Università degli Studi Federico II, Napoli; 80126, Italy; (22) Department of Physics, Virginia Tech, Blacksburg; VA; 24061, United States; (23) Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow; 119991, Russia; (24) Department of Physics, Università degli Studi, Milano; 20133, Italy; (25) St. Petersburg Nuclear Physics Institute NRC, Kurchatov Institute, Gatchina; 188350, Russia; (26) Department of Physics and Astronomy, University of Hawai'i, Honolulu; HI; 96822, United States; (27) Joint Institute for Nuclear Research, Dubna; 141980, Russia; (28) Department of Physics, Temple University, Philadelphia; PA; 19122, United States; (29) Kavli Institute, Enrico Fermi Institute, Dept. of Physics, University of Chicago, Chicago; IL; 60637, United States; (30) Institute for High Energy Physics, Beijing; 100049, China; (31) Laboratorio Subterráneo de Canfranc, Canfranc Estación, E-22880, Spain; (32) IPHC, 19 Université de Strasbourg, CNRS/IN2P3, Strasbourg; 67037, France; (33) School of Natural Sciences, Black Hills State University, Spearflsh; SD; 57799, United States; (34) Institute for National Research, National Academy of Sciences of Ukraine, Kiev; 03680, Ukraine; (35) Radiation Physics Laboratory, Belgorod National Research University, Belgorod; 308007, Russia; (36) SLAC National Accelerator Laboratory, Menlo Park; CA; 94025, United States; (37) National Research Centre Kurchatov Institute, Moscow; 123182, Russia; (38) National Research Nuclear University MEPhI, Moscow; 115409, Russia; (39) Department of Chemistry, Biology and Biotechnology, Università degli Studi, Perugia; 06123, Italy; (40) Istituto Nazionale di Fisica Nucleare, Sezione di Perugia, Perugia; 06123, Italy; (41) Department of Physics, University of California, Davis; CA; 95616, United States; (42) Smoluchowski Institute of Physics, Jagiellonian University, Krakow; 30059, Poland; (43) Lawrence Livermore National Laboratory, Livermore; CA; 94550, United States; (44) Institute of Physics Gleb Wataghin Universidade Estadual de Campinas, São Paulo; 13083-859, Brazil; (45) School of Physics, University of Chinese, Academy of Sciences, Beijing; 100049, China^9

[效力级别] 天文学 [学科分类] 天文学(综合)

[关键词] Dark matter detection;Gran Sasso National Laboratory;In-situ measurement;Liquid scintillator;Time projection chambers;Water Cherenkov detectors;Wavelength shifter;Weakly interacting massive particles