Discrimination with Liquid Xenon

• No Applied Electric Field

  • Allow Recombination
  • Discrimination on photon timing

    • nuclear recoil fast (<10ns)
    • electron recoil slow (45ns)

• Applied Electric Field

  • Prevent Recombination

    • nuclear - high primary scint. low ionisation yield
    • electron - low primary scint. high ionisation yield
  • Drift ionisation

    • proportional (secondary) scintillation in liquid
    • electroluminescence in gas phase
    • GEM in gas phase

      • TEA dopant to convert scintillation->ionisation
    • Discrimination on

      • ratio primary/secondary scintillation
      • ratio primary scintillation/electroluminescence
      • ionisation spatial distribution

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