Calibration of the STAR Time-of-Flight Detector for Particle Identification
Llope, William J.
Master of Science
This thesis describes several calibrations of the Time-of-Flight (TOF) detector at the Solenoidal Tracker at RHIC (STAR). These calibrations are required to allow Particle Identification (PID) which benefits many physics analysis. These calibrations treat the Integral Non-Linearity (INL) of the time to digital converters, the global offsets, the slewing from pulse time dependence on the pulse height, and the transmission times inside the detectors. Each of these corrections will be described. The data for the INL correction was collected at Rice University using two different electronics configurations. Care was taken to insure the two approaches were consistent. These calibrations were tested using "cable-delay tests." Data from RHIC Run 9 200 GeV data will be used to confirm the effectiveness of the INL, offset, slewing, and transmission time calibrations.
Pure sciences; Particle physics