8 documents found, page 1 of 1
PMT calibration of a scintillation detector using primary scintillation
Freitas, E. D. C.; Fernandes, L. M. P.; Yahlali, N.; Pérez, J.; Álvarez, V.; Borges, F. I. G.; Camargo, M.; Cárcel, S.; Cebrián, S.; Cervera, A.
Ionization and scintillation of nuclear recoils in gaseous xenon
Renner, J.; Gehman, V. M.; Goldschmidt, A.; Matis, H. S.; Miller, T.; Nakajima, Y.; Nygren, D.; Oliveira, C. A. B.; Shuman, D.; Álvarez, V.
Measurements of neutrons produced by high-energy muons at the Boulby Undergroun...
Araújo, H. M.; Blockley, J.; Bungau, C.; Carson, M. J.; Chagani, H.; Daw, E.; Edwards, B.; Ghag, C.; Korolkova, E. V.; Kudryavtsev, V. A.We present the first measurements of the muon-induced neutron flux at the Boulby Underground Laboratory. The experiment was carried out with an 0.73 tonne liquid scintillator that also served as an anticoincidence system for the ZEPLIN-II direct dark matter search. The experimental method exploited the delayed coincidences between high-energy muon signals and gamma-rays from radiative neutron capture on hydroge...
The ZEPLIN II dark matter detector: Data acquisition system and data reduction
Alner, G. J.; Araújo, H. M.; Bewick, A.; Bungau, C.; Camanzi, B.; Carson, M. J.; Chagani, H.; Chepel, V.; Cline, D.; Davidge, D.; Davies, J. C.; Daw, E.ZEPLIN II is a two-phase (liquid/gas) xenon dark matter detector searching for WIMP-nucleon interactions. In this paper we describe the data acquisition system used to record the data from ZEPLIN II and the reduction procedures which parameterise the data for subsequent analysis.; http://www.sciencedirect.com/science/article/B6TJM-4R40SHG-9/1/eea3463e234b214a8a5d521b721d303a
The ZEPLIN III Detector; Results from Surface Calibrations
Sumner, T. J.; Akimov, D. Yu.; Alner, G. J.; Araújo, H. M.; Bewick, A.; Bungau, C.; Burenkov, A. A.; Carson, M. J.; Chagani, H.; Chepel, V.; Cline, D.ZEPLIN-III is a direct dark-matter search instrument using liquid xenon as a target.Both the scintillation light and the ionisation charge are measured.The instrument has been built and it is currently being testing in a surface laboratory.We present results from some of the initial testing, including design thermal control system verification, photomultiplier calibration (including spectral measurements with 6...
The ZEPLIN-III dark matter detector: Instrument design, manufacture and commiss...
Akimov, D. Yu.; Alner, G. J.; Araújo, H. M.; Bewick, A.; Bungau, C.; Burenkov, A. A.; Carson, M. J.; Chagani, H.; Chepel, V.; Cline, D.; Davidge, D.We present details of the technical design, manufacture and testing of the ZEPLIN-III dark matter experiment. ZEPLIN-III is a two-phase xenon detector which measures both the scintillation light and the ionisation charge generated in the liquid by interacting particles and radiation. The instrument design is driven by both the physics requirements and by the technology requirements surrounding the use of liquid...
Limits on spin-dependent WIMP-nucleon cross-sections from the first ZEPLIN-II data
Alner, G. J.; Araújo, H. M.; Bewick, A.; Bungau, C.; Camanzi, B.; Carson, M. J.; Cashmore, R. J.; Chagani, H.; Chepel, V.; Cline, D.; Davidge, D.The first underground data run of the ZEPLIN-II experiment has set a limit on the nuclear recoil rate in the two-phase xenon detector for direct dark matter searches. In this Letter the results from this run are converted into the limits on spin-dependent WIMP-proton and WIMP-neutron cross-sections. The minimum of the curve for WIMP-neutron cross-section corresponds to 7×10-2 pb at a WIMP mass of around 65 GeV....
Compatibility relationships in Magnesia-Chrome Refractories: Part 1 Composition...
Segadães, A. M.; Brett, N. H.; White, J.The results of an investigation of compositional relationships between the periclase, spinel and liquid phases in the systems MgO-(Al2O3-Cr2O3)-CS, MgO-(Al2O3-Fe2O3)-CS and MgO-(Cr2O3-Fe2O3)-CS are presented and combined with the results of two earlier investigations to establish compatibility relationships between the phases within the primary crystalIization volumes of periclase in these systems. Two methods ...