Position Reconstruction in a Dual Phase Xenon Scintillation Detector

V. N. Solovov*, V. A. Belov, D. Yu Akimov, H. M. Araujo, E. J. Barnes, A. A. Burenkov, V. Chepel, A. Currie, L. DeViveiros, B. Edwards, C. Ghag, A. Hollingsworth, M. Horn, G. E. Kalmus, A. S. Kobyakin, A. G. Kovalenko, V. N. Lebedenko, A. Lindote, M. I. Lopes, R. LuescherP. Majewski, A. S. J. Murphy, F. Neves, S. M. Paling, J. Pinto da Cunha, R. Preece, J. J. Quenby, L. Reichhart, P. R. Scovell, C. Silva, N. J. T. Smith, P. F. Smith, V. N. Stekhanov, T. J. Sumner, C. Thorne, R. J. Walker

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

We studied the application of statistical reconstruction algorithms, namely maximum likelihood and least squares methods, to the problem of event reconstruction in a dual phase liquid xenon detector. An iterative method was developed for in-situ reconstruction of the PMT light response functions from calibration data taken with an uncollimated gamma-ray source. Using the techniques described, the performance of the ZEPLIN-III dark matter detector was studied for 122 keV gamma-rays. For the inner part of the detector (R <100 mm), spatial resolutions of 13 mm and 1.6 mm FWHM were measured in the horizontal plane for primary and secondary scintillation, respectively. An energy resolution of 8.1% FWHM was achieved at that energy. The possibility of using this technique for improving performance and reducing cost of scintillation cameras for medical applications is currently under study.

Original languageEnglish
Pages (from-to)3286-3293
Number of pages8
JournalIEEE Transactions on Nuclear Science
Volume59
Issue number6
DOIs
Publication statusPublished - Dec 2012

Keywords

  • Dark matter
  • dual phase detectors
  • liquid xenon
  • maximum likelihood
  • position reconstruction
  • scintillation camera
  • weighted least squares
  • weakly interacting massive particles (WIMPs)
  • ZEPLIN-III
  • DARK-MATTER
  • CAMERAS
  • MAXIMUM
  • STATISTICS

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