Imperial College London
Professor Timothy Sumner

ProfessorTimothySumner

Faculty of Natural Sciences, Department of Physics

Professor of Experimental Astrophysics
 
 
 
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Contact

 

+44 (0)20 7594 7552t.sumner

 
 
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Location

 

1108Blackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Burgos:2008:10.1016/j.nima.2007.10.013,
author = {Burgos, S and Forbes, J and Ghag, C and Gold, M and Kudryavtsev, VA and Lawson, TB and Loomba, D and Majewski, P and Muna, D and Murphy, ASJ and Nicklin, GG and Paling, SM and Petkov, A and Plank, SJS and Robinson, M and Sanghi, N and Smith, NJT and Snowden-Ifft, DP and Spooner, NJC and Sumner, TJ and Turk, J and Tziaferi, E},
doi = {10.1016/j.nima.2007.10.013},
journal = {Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment},
pages = {114--128},
title = {Track reconstruction and performance of DRIFT directional dark matter detectors using alpha particles},
url = {http://dx.doi.org/10.1016/j.nima.2007.10.013},
volume = {584},
year = {2008}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - First results are presented from an analysis of data from the DRIFT-IIa and DRIFT-IIb directional dark matter detectors at Boulby Mine in which alpha particle tracks were reconstructed and used to characterise detector performance—an important step towardsoptimising directional technology. The drift velocity in DRIFT-IIa was 59:3 0:2 (stat) 7:5 (sys) ms 1based on an analysis ofnaturally occurring alpha-emitting background. The drift velocity in DRIFT-IIb was 57 1 (stat) 3 (sys) ms 1determined by theanalysis of alpha particle tracks from a210Po source. Three-dimensional range reconstruction and range spectra were used to identifyalpha particles from the decay of222Rn,218Po,220Rn and216Po. This study found thatð22 2Þ%of218Po progeny (from222Rn decay)did not plate out and remained suspended in the 40 Torr CS2gas fill until they decayed. A likely explanation for this is that some of thepolonium progeny are produced in an uncharged state. For216Po progeny (from220Rn decay) the undeposited fraction was apparentlymuch higher atð100þ0 35Þ% most likely due to a shorter lifetime, causing a larger fraction of the progeny to decay whilst drifting to the cathode plane. This explanation implies a much slower drift time for positively charged polonium progeny compared to CS2 ions.
AU  - Burgos,S
AU  - Forbes,J
AU  - Ghag,C
AU  - Gold,M
AU  - Kudryavtsev,VA
AU  - Lawson,TB
AU  - Loomba,D
AU  - Majewski,P
AU  - Muna,D
AU  - Murphy,ASJ
AU  - Nicklin,GG
AU  - Paling,SM
AU  - Petkov,A
AU  - Plank,SJS
AU  - Robinson,M
AU  - Sanghi,N
AU  - Smith,NJT
AU  - Snowden-Ifft,DP
AU  - Spooner,NJC
AU  - Sumner,TJ
AU  - Turk,J
AU  - Tziaferi,E
DO  - 10.1016/j.nima.2007.10.013
EP  - 128
PY  - 2008///
SN  - 0168-9002
SP  - 114
TI  - Track reconstruction and performance of DRIFT directional dark matter detectors using alpha particles
T2  - Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
UR  - http://dx.doi.org/10.1016/j.nima.2007.10.013
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000252559100008&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - http://hdl.handle.net/10044/1/63581
VL  - 584
ER  -
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