Far-Forward Tracking and Calorimetry

The Far Forward region consists of four zones:

• Tracker and EMCal in B0 magnet
  • Approximate acceptance 7<theta<20 mrad, with theta relative to the ion beam line
• FFQ magnet string
  • Cold bore (~20K). No detectors. Possible future upgrade with superconducting nano wire trackers, of especial interest for e.g. Lambda -> p pi- decays
• Off-Momentum Trackers
  • RP stations between 25 and 35 m downstream of IP
  • AC-LGAD (timing & tracking)
  • SiO2 Cherenkov radiator (dZ resolution by signal amplitude)
  • ZDC, 38 m from IP
• EMCal and HCal
  • Secondary Focus RP trackers
  • Acceptance (P = 275 GeV, could be different at P=41 GeV)
    • File:IP8 SecondaryFocus.pdf