Speaker
Description
The rich physics program at EIC reuqires excellent Particle Identification (PID) over a
large momentum and angle range. Hence, a key component of the EIC detector ePIC are
advanced ToF (Time of Flight) and Ring Imaging Cherenkov (RICH) detectors. In addi-
tion, a new type of Cherenkov detector will be used which is called high-performance
DIRC (hpDIRC) detector. It utilizes internally reflected Cherenkov light to achieve
precise hadron identification, particularly for pions (π) and kaons (K), ensuring clear
separation of these particles for accurate measurements.
Tiny misalignments at the hierarchical or sensor level can degrade the detector’s per-
formance. This presentation explores the impact of realistic misalignment scenarios on
Cherenkov angle accuracy and discusses strategies to mitigate these effects. We high-
light the use of track-based realignment techniques, demonstrating that the hpDIRC can
achieve over 4σ π/K separation up to 6 GeV/c, even under challenging alignment con-
ditions. All studies are based on Geant4 Monte Carlo simulations using a standalone
simulation framework including the hpDIRC geometry.
