Imperial College London
Professor Quenby

Professor Quenby

Faculty of Natural Sciences, Department of Physics

Distinguished Research Fellow
 
 
 
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Contact

 

+44 (0)20 7594 7527j.quenby

 
 
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Location

 

1106Blackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Akimov:2010:10.1016/j.astropartphys.2010.06.010,
author = {Akimov, DY and Araujo, HM and Barnes, EJ and Belov, VA and Burenkov, AA and Chepel, V and Currie, A and Edwards, B and Francis, V and Ghag, C and Hollingsworth, A and Horn, M and Kalmus, GE and Kobyakin, AS and Kovalenko, AG and Lebedenko, VN and Lindote, A and Lopes, MI and Luescher, R and Lyons, K and Majewski, P and Murphy, ASJ and Neves, F and Paling, SM and da, Cunha JP and Preece, R and Quenby, JJ and Reichhart, L and Scovell, PR and Solovov, VN and Smith, NJT and Smith, PF and Stekhanov, VN and Sumner, TJ and Taylor, R and Thorne, C and Walker, RJ},
doi = {10.1016/j.astropartphys.2010.06.010},
journal = {Astroparticle Physics},
pages = {151--163},
title = {The ZEPLIN-III anti-coincidence veto detector},
url = {http://dx.doi.org/10.1016/j.astropartphys.2010.06.010},
volume = {34},
year = {2010}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - The design, optimisation and construction of an anti-coincidence veto detector to complement the ZEPLIN-III direct dark matter search instrument is described. One tonne of plastic scintillator is arranged into 52 bars individually read out by photomultipliers and coupled to a gadolinium-loaded passive polypropylene shield. Particular attention has been paid to radiological content. The overall aim has been to achieve a veto detector of low threshold and high efficiency without the creation of additional background in ZEPLIN-III, all at a reasonable cost. Extensive experimental measurements of the components have been made, including radioactivity levels and performance characteristics. These have been used to inform a complete end-to-end Monte Carlo simulation that has then been used to calculate the expected performance of the new instrument, both operating alone and as an anti-coincidence detector for ZEPLIN-III. The veto device will be capable of rejecting over 65% of coincident nuclear recoil events from neutron background in the energy range of interest in ZEPLIN-III. This will reduce the background in ZEPLIN-III from 0.4 to 0.14 events per year in the WIMP acceptance region, a significant factor in the event of a non-zero observation. Furthermore, in addition to providing valuable diagnostic capabilities, the veto is capable of tagging over 15% for γ-ray rejection, all whilst contributing no significant additional background. In conjunction with the replacement of the internal ZEPLIN-III photomultiplier array, the new veto is expected to improve significantly the sensitivity of the ZEPLIN-III instrument to dark matter, allowing spin-independent WIMP-nucleon cross sections below 10−8 pb to be probed.
AU  - Akimov,DY
AU  - Araujo,HM
AU  - Barnes,EJ
AU  - Belov,VA
AU  - Burenkov,AA
AU  - Chepel,V
AU  - Currie,A
AU  - Edwards,B
AU  - Francis,V
AU  - Ghag,C
AU  - Hollingsworth,A
AU  - Horn,M
AU  - Kalmus,GE
AU  - Kobyakin,AS
AU  - Kovalenko,AG
AU  - Lebedenko,VN
AU  - Lindote,A
AU  - Lopes,MI
AU  - Luescher,R
AU  - Lyons,K
AU  - Majewski,P
AU  - Murphy,ASJ
AU  - Neves,F
AU  - Paling,SM
AU  - da,Cunha JP
AU  - Preece,R
AU  - Quenby,JJ
AU  - Reichhart,L
AU  - Scovell,PR
AU  - Solovov,VN
AU  - Smith,NJT
AU  - Smith,PF
AU  - Stekhanov,VN
AU  - Sumner,TJ
AU  - Taylor,R
AU  - Thorne,C
AU  - Walker,RJ
DO  - 10.1016/j.astropartphys.2010.06.010
EP  - 163
PY  - 2010///
SN  - 1873-2852
SP  - 151
TI  - The ZEPLIN-III anti-coincidence veto detector
T2  - Astroparticle Physics
UR  - http://dx.doi.org/10.1016/j.astropartphys.2010.06.010
UR  - http://hdl.handle.net/10044/1/37051
VL  - 34
ER  -
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