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Signals induced by charge-trapping in EDELWEISS FID detectors: analytical modeling and applications

Journal of Instrumentation Institute of Physics 11:10 (2016) P10008

Authors:

Quentin Arnaud, Eric Armengaud, Corinne Augier, Alain Benoît, Laurent Bergé, Julien Billard, Johannes Blümer, Thibault de Boissière, Alex Broniatowski, Philippe Camus, Antoine Cazes, Maurice Chapellier, Florence Charlieux, Louis Dumoulin, Klaus Eitel, Nadine Foerster, Nicolas Fourches, Jules Gascon, Andrea Giuliani, Michel Gros, Lukas Hehn, Geertje Heuermann, Maryvonne de Jésus, JunSong Lin, Alex Juillard, Matthias Kleifges, Valentin Kozlov, Hans Kraus, Cecile Kéfélian, Vitaly A Kudryavtsev, Helène Le-Sueur, Stefanos Marnieros, Xavier-Francois Navick, Claudia Nones, Emiliano Olivieri, Patrick Pari, Bernard Paul, Marie-Cécile Piro, Denys Poda, Emiline Queguiner, Sergey Rozov, Véronique Sanglard, Benjamin Schmidt, Silvia Scorza, Bernhard Siebenborn, Denis Tcherniakhovski, Lionel Vagneron, Marc Weber, Evgeny Yakushev

Abstract:

The EDELWEISS-III experiment uses cryogenic HP-Ge detectors Fully covered with Inter-Digitized electrodes (FID). They are operated at low fields (< 1 V=cm), and as a consequence charge-carrier trapping significantly affects both the ionization and heat energy measurements. This paper describes an analytical model of the signals induced by trapped charges in FID detectors based on the Shockley-Ramo theorem. It is used to demonstrate that veto electrodes, initially designed for the sole purpose of surface event rejection, can be used to provide a sensitivity to the depth of the energy deposits, characterize the trapping in the crystals, perform heat and ionization energy corrections and improve the ionization baseline resolutions. These procedures are applied successfully to actual data.

Results from a search for dark matter in the complete LUX exposure

(2016)

Authors:

DS Akerib, S Alsum, HM Araújo, X Bai, AJ Bailey, J Balajthy, P Beltrame, EP Bernard, A Bernstein, TP Biesiadzinski, EM Boulton, R Bramante, P Brás, D Byram, SB Cahn, MC Carmona-Benitez, C Chan, AA Chiller, C Chiller, A Currie, JE Cutter, TJR Davison, A Dobi, JEY Dobson, E Druszkiewicz, BN Edwards, CH Faham, S Fiorucci, RJ Gaitskell, VM Gehman, C Ghag, KR Gibson, MGD Gilchriese, CR Hall, M Hanhardt, SJ Haselschwardt, SA Hertel, DP Hogan, M Horn, DQ Huang, CM Ignarra, M Ihm, RG Jacobsen, W Ji, K Kamdin, K Kazkaz, D Khaitan, R Knoche, NA Larsen, C Lee, BG Lenardo, KT Lesko, A Lindote, MI Lopes, A Manalaysay, RL Mannino, MF Marzioni, DN McKinsey, DM Mei, J Mock, M Moongweluwan, JA Morad, A St J Murphy, C Nehrkorn, HN Nelson, F Neves, K O`Sullivan, KC Oliver-Mallory, KJ Palladino, EK Pease, P Phelps, L Reichhart, C Rhyne, S Shaw, TA Shutt, C Silva, M Solmaz, VN Solovov, P Sorensen, S Stephenson, TJ Sumner, M Szydagis, DJ Taylor, WC Taylor, BP Tennyson, PA Terman, DR Tiedt, WH To, M Tripathi, L Tvrznikova, S Uvarov, JR Verbus, RC Webb, JT White, TJ Whitis, MS Witherell, FLH Wolfs, J Xu, K Yazdani, SK Young, C Zhang

Low-energy (0.7-74 keV) nuclear recoil calibration of the LUX dark matter experiment using D-D neutron scattering kinematics

ArXiv 1608.05381 (2016)

Authors:

LUX Collaboration, DS Akerib, S Alsum, HM Araújo, X Bai, AJ Bailey, J Balajthy, P Beltrame, EP Bernard, A Bernstein, TP Biesiadzinski, EM Boulton, A Bradley, R Bramante, P Brás, D Byram, SB Cahn, MC Carmona-Benitez, C Chan, JJ Chapman, AA Chiller, C Chiller, A Currie, JE Cutter, TJR Davison, L de Viveiros, A Dobi, JEY Dobson, E Druszkiewicz, BN Edwards, CH Faham, S Fiorucci, RJ Gaitskell, VM Gehman, C Ghag, KR Gibson, MGD Gilchriese, CR Hall, M Hanhardt, SJ Haselschwardt, SA Hertel, DP Hogan, M Horn, DQ Huang, CM Ignarra, M Ihm, RG Jacobsen, W Ji, K Kamdin, K Kazkaz, D Khaitan, R Knoche, NA Larsen, C Lee, BG Lenardo, KT Lesko, A Lindote, MI Lopes, DC Malling, A Manalaysay, RL Mannino, MF Marzioni, DN McKinsey, DM Mei, J Mock, M Moongweluwan, JA Morad, A St J Murphy, C Nehrkorn, HN Nelson, F Neves, K O'Sullivan, KC Oliver-Mallory, KJ Palladino, M Pangilinan, EK Pease, P Phelps, L Reichhart, CA Rhyne, S Shaw, TA Shutt, C Silva, M Solmaz, VN Solovov, P Sorensen, S Stephenson, TJ Sumner, M Szydagis, DJ Taylor, WC Taylor, BP Tennyson, PA Terman, DR Tiedt, WH To, M Tripathi, L Tvrznikova, S Uvarov, JR Verbus, RC Webb, JT White, TJ Whitis, MS Witherell, FLH Wolfs, J Xu, K Yazdani, SK Young, C Zhang

Abstract:

The Large Underground Xenon (LUX) experiment is a dual-phase liquid xenon time projection chamber (TPC) operating at the Sanford Underground Research Facility in Lead, South Dakota. A calibration of nuclear recoils in liquid xenon was performed $\textit{in situ}$ in the LUX detector using a collimated beam of mono-energetic 2.45 MeV neutrons produced by a deuterium-deuterium (D-D) fusion source. The nuclear recoil energy from the first neutron scatter in the TPC was reconstructed using the measured scattering angle defined by double-scatter neutron events within the active xenon volume. We measured the absolute charge ($Q_{y}$) and light ($L_{y}$) yields at an average electric field of 180 V/cm for nuclear recoil energies spanning 0.7 to 74 keV and 1.1 to 74 keV, respectively. This calibration of the nuclear recoil signal yields will permit the further refinement of liquid xenon nuclear recoil signal models and, importantly for dark matter searches, clearly demonstrates measured ionization and scintillation signals in this medium at recoil energies down to $\mathcal{O}$(1 keV).

Characteristics of Four Upward-Pointing Cosmic-Ray-like Events Observed with ANITA

Physical Review Letters American Physical Society (APS) 117:7 (2016) 071101

Authors:

PW Gorham, J Nam, A Romero-Wolf, S Hoover, P Allison, O Banerjee, JJ Beatty, K Belov, DZ Besson, WR Binns, V Bugaev, P Cao, C Chen, P Chen, JM Clem, A Connolly, B Dailey, C Deaconu, L Cremonesi, PF Dowkontt, MA DuVernois, RC Field, BD Fox, D Goldstein, J Gordon, C Hast, CL Hebert, B Hill, K Hughes, R Hupe, MH Israel, A Javaid, J Kowalski, J Lam, JG Learned, KM Liewer, TC Liu, JT Link, E Lusczek, S Matsuno, BC Mercurio, C Miki, P Miočinović, M Mottram, K Mulrey, CJ Naudet, J Ng, RJ Nichol, K Palladino, BF Rauch, K Reil, J Roberts, M Rosen, B Rotter, J Russell, L Ruckman, D Saltzberg, D Seckel, H Schoorlemmer, S Stafford, J Stockham, M Stockham, B Strutt, K Tatem, GS Varner, AG Vieregg, D Walz, SA Wissel, F Wu

New limits on double electron capture of 40 Ca and 180 W

Journal of Physics G: Nuclear and Particle Physics Institute of Physics 43:9 (2016) 095202

Authors:

Godehard Angloher, Matthias Bauer, Philipp Bauer, Irina Bavykina, Antonio CSSM Bento, Carlo Bucci, Lucia Canonica, Christian Ciemniak, Xavier Defay, Gerhard Deuter, Andreas Erb, Franz von Feilitzsch, Nahuel Ferreiro Iachellini, Achim Gütlein, Christian Isaila, Margit Kiefer, Hans Kraus, Franz Pröbst, Sabine Roth, Christian Sailer, Anja Tanzke, Thi-Hieu Ho, Andreas Ulrich, Michael Willers, Mark Wüstrich

Abstract:

We analyzed low-background data from the CRESST-II experiment with a total net exposure of 730 kg days to extract limits on double electron capture processes. We established new limits for 40Ca with T1/22v2K > 9.9 × 1021 y and T1/20v2EC > 1.4 × 1022 y and for 180W T1/22v/2K > 3.1 × 1019 with y and T1/20v2ED > 9.4 × 1018 y at 90% CL. Depending on the process, these values improve the currently best limits by a factor of ∼1.4-30.