Professor Jocelyn Monroe: Publications

DMTPC: A dark matter detector with directional sensitivity

Aip Conference Proceedings 1182 (2009) 276-279

Authors:

JBR Battat, S Ahlen, T Caldwell, D Dujmic, A Dushkin, P Fisher, F Golub, S Goyal, S Henderson, A Inglis, R Lanza, J Lopez, A Kaboth, G Kohse, J Monroe, G Sciolla, BN Skvorodnev, H Tomita, R Vanderspek, H Wellenstein, RYamamoto

Abstract:

By correlating nuclear recoil directions with the Earth's direction of motion through the Galaxy, a directional dark matter detector can unambiguously detect Weakly Interacting Massive Particles (WIMPs), even in the presence of backgrounds. Here, we describe the Dark Matter TimeProjection Chamber (DMTPC) detector, a TPC filled with CF4 gas at low pressure (0.1 atm). Using this detector, we have measured the vector direction (head-tail) of nuclear recoils down to energies of 100 keV with an angular resolution of ≤15°. To study our detector backgrounds, we have operated in a basement laboratory on the MIT campus for several months. We are currently building a new, high-radiopurity detector for deployment underground at the Waste Isolation Pilot Plant facility in New Mexico. © 2009 American Institute of Physics.

A background-free direction-sensitive neutron detector

Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment 608:2 (2009) 305-309

Authors:

A Roccaro, H Tomita, S Ahlen, D Avery, A Inglis, J Battat, D Dujmic, P Fisher, S Henderson, A Kaboth, G Kohse, R Lanza, J Monroe, G Sciolla, N Skvorodnev, H Wellenstein, R Yamamoto

Abstract:

A significant advance in the detection of neutrons and determination of their energy and direction of motion in a simple, compact device has been reported. The new detector can be used to determine the neutron flux, the energy distribution, and the direction of motion neutron for both fast and thermal neutrons. The detector is free of backgrounds from X-rays, gamma rays, beta particles, relativistic singly charged particles, and cosmic ray neutrons. It is capable of determining the location of a source of fission neutrons based on the characteristics of elastic scattering of neutrons by helium nuclei. The light collecting system included an ultraviolet lens and an image intensifier that was followed by a phosphor screen. Image analysis software to automate data analysis has also been developed.

Measurement of the Ratio of the νμ Charged-Current Single-Pion Production to Quasielastic Scattering with a 0.8 GeV Neutrino Beam on Mineral Oil

Physical Review Letters American Physical Society (APS) 103:8 (2009) 081801

Authors:

AA Aguilar-Arevalo, CE Anderson, AO Bazarko, SJ Brice, BC Brown, L Bugel, J Cao, L Coney, JM Conrad, DC Cox, A Curioni, Z Djurcic, DA Finley, BT Fleming, R Ford, FG Garcia, GT Garvey, C Green, JA Green, TL Hart, E Hawker, R Imlay, RA Johnson, G Karagiorgi, P Kasper, T Katori, T Kobilarcik, I Kourbanis, S Koutsoliotas, EM Laird, SK Linden, JM Link, Y Liu, Y Liu, WC Louis, KBM Mahn, W Marsh, VT McGary, G McGregor, W Metcalf, PD Meyers, F Mills, GB Mills, J Monroe, CD Moore, RH Nelson, P Nienaber, JA Nowak, B Osmanov, S Ouedraogo, RB Patterson, D Perevalov, CC Polly, E Prebys, JL Raaf, H Ray, BP Roe, AD Russell, V Sandberg, R Schirato, D Schmitz, MH Shaevitz, FC Shoemaker, D Smith, M Soderberg, M Sorel, P Spentzouris, J Spitz, I Stancu, RJ Stefanski, M Sung, HA Tanaka, R Tayloe, M Tzanov, R Van de Water, MO Wascko, DH White, MJ Wilking, HJ Yang, GP Zeller, ED Zimmerman

Search for Muon Neutrino and Antineutrino Disappearance in MiniBooNE

Physical Review Letters American Physical Society (APS) 103:6 (2009) 061802

Authors:

AA Aguilar-Arevalo, CE Anderson, AO Bazarko, SJ Brice, BC Brown, L Bugel, J Cao, L Coney, JM Conrad, DC Cox, A Curioni, Z Djurcic, DA Finley, BT Fleming, R Ford, FG Garcia, GT Garvey, J Grange, C Green, JA Green, TL Hart, E Hawker, R Imlay, RA Johnson, G Karagiorgi, P Kasper, T Katori, T Kobilarcik, I Kourbanis, S Koutsoliotas, EM Laird, SK Linden, JM Link, Y Liu, Y Liu, WC Louis, KBM Mahn, W Marsh, C Mauger, VT McGary, G McGregor, W Metcalf, PD Meyers, F Mills, GB Mills, J Monroe, CD Moore, J Mousseau, RH Nelson, P Nienaber, JA Nowak, B Osmanov, S Ouedraogo, RB Patterson, Z Pavlovic, D Perevalov, CC Polly, E Prebys, JL Raaf, H Ray, BP Roe, AD Russell, V Sandberg, R Schirato, D Schmitz, MH Shaevitz, FC Shoemaker, D Smith, M Soderberg, M Sorel, P Spentzouris, J Spitz, I Stancu, RJ Stefanski, M Sung, HA Tanaka, R Tayloe, M Tzanov, RG Van de Water, MO Wascko, DH White, MJ Wilking, HJ Yang, GP Zeller, ED Zimmerman

Measurement of the cosmic ray and neutrino-induced muon flux at the Sudbury neutrino observatory

Physical Review D - Particles, Fields, Gravitation and Cosmology 80:1 (2009)

Authors:

B Aharmim, SN Ahmed, TC Andersen, AE Anthony, N Barros, EW Beier, A Bellerive, B Beltran, M Bergevin, SD Biller, K Boudjemline, MG Boulay, TH Burritt, B Cai, YD Chan, M Chen, MC Chon, BT Cleveland, GA Cox-Mobrand, CA Currat, X Dai, F Dalnoki-Veress, H Deng, J Detwiler, PJ Doe, RS Dosanjh, G Doucas, PL Drouin, FA Duncan, M Dunford, SR Elliott, HC Evans, GT Ewan, J Farine, H Fergani, F Fleurot, RJ Ford, JA Formaggio, N Gagnon, JTM Goon, K Graham, DR Grant, E Guillian, S Habib, RL Hahn, AL Hallin, ED Hallman, CK Hargrove, PJ Harvey, R Hazama, KM Heeger, WJ Heintzelman, J Heise, RL Helmer, RJ Hemingway, R Henning, A Hime, C Howard, MA Howe, M Huang, B Jamieson, NA Jelley, JR Klein, M Kos, A Krüger, C Kraus, CB Krauss, T Kutter, CCM Kyba, R Lange, J Law, IT Lawson, KT Lesko, JR Leslie, I Levine, JC Loach, S Luoma, R MacLellan, S Majerus, HB Mak, J Maneira, AD Marino, R Martin, N McCauley, AB McDonald, S McGee, C Mifflin, ML Miller, B Monreal, J Monroe, AJ Noble, NS Oblath, CE Okada, HM O'Keeffe, Y Opachich, GDO Gann, SM Oser, RA Ott, SJM Peeters, AWP Poon

Abstract:

Results are reported on the measurement of the atmospheric neutrino-induced muon flux at a depth of 2 kilometers below the Earth's surface from 1229 days of operation of the Sudbury Neutrino Observatory (SNO). By measuring the flux of through-going muons as a function of zenith angle, the SNO experiment can distinguish between the oscillated and unoscillated portion of the neutrino flux. A total of 514 muonlike events are measured between -1≤cos θzenith≤0.4 in a total exposure of 2.30×1014cm2s. The measured flux normalization is 1.22±0.09 times the Bartol three-dimensional flux prediction. This is the first measurement of the neutrino-induced flux where neutrino oscillations are minimized. The zenith distribution is consistent with previously measured atmospheric neutrino oscillation parameters. The cosmic ray muon flux at SNO with zenith angle cos θzenith>0.4 is measured to be (3.31±0.01(stat)±0.09(sys))×10-10μ/s/cm2. © 2009 The American Physical Society.

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