scatter events may be characterised without biasing the analysis of candidate WIMP signals in the data.'
author:
- 'C. Ghag[^1]'
- 'D.Yu. Akimov'
- 'H.M. Araújo'
- 'E.J. Barnes'
- 'V.A. Belov'
- 'A.A. Burenkov'
- 'V. Chepel'
- 'A. Currie'
- 'L. DeViveiros'
- 'B. Edwards'
- 'V. Francis'
- 'A. Hollingsworth'
- 'M. Horn'
- 'G.E. Kalmus'
- 'A.S. Kobyakin'
- 'A.G. Kovalenko'
- 'V.N. Lebedenko'
- 'A. Lindote'
- 'M.I. Lopes'
- 'R. Lüscher'
- 'K. Lyons'
- 'P. Majewski'
- 'A.StJ. Murphy'
- 'F. Neves'
- 'S.M. Paling'
- 'J. Pinto da Cunha'
- 'R. Preece'
- 'J.J. Quenby'
- 'L. Reichhart'
- 'P.R. Scovell'
- 'C. Silva'
- 'V.N. Solovov'
- 'N.J.T. Smith'
- 'P.F. Smith'
- 'V.N. Stekhanov'
- 'T.J. Sumner'
- 'C. Thorne'
- 'R.J. Walker'
title: 'Performance of the veto detector incorporated into the ZEPLIN–III experiment'
---

INTRODUCTION
============

The ZEPLIN–III instrument [@akimov2007; @z3sim] is a two phase (liquid/gas) xenon detector with photomultiplier (PMT) readout designed to observe the low energy nuclear recoils from elastic scattering of weakly interacting massive particles (WIMPs). ZEPLIN–III records both direct scintillation light ([*S1*]{}) and electroluminescence from ionisation ([*S2*]{}) of the xenon target [@lebedenko] following an energy 