Source calibrations and SDC calorimeter requirements
Several studies of the problem of calibration of the SDC calorimeter exist. In this note the attempt is made to give a connected account of the requirements on the source calibration from the point of view of the desired, and acceptable, constant term induced in the EM resolution. It is assumed that a local'' calibration resulting from exposing each tower to a beam of electrons is not feasible. It is further assumed that an in situ'' calibration is either not yet performed, or is unavailable due to tracking alignment problems or high luminosity operation rendering tracking inoperative. Therefore, the assumptions used are rather conservative. In this scenario, each scintillator plate of each tower is exposed to a moving radioactive source. That reading is used to mask'' an optical cookie'' in a grey code chosen so as to make the response uniform. The source is assumed to be the sole calibration of the tower. Therefore, the phrase global'' calibration of towers by movable radioactive sources is adopted.
- Research Organization:
- Fermi National Accelerator Lab. (FNAL), Batavia, IL (United States)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC02-76CH03000
- OSTI ID:
- 6969889
- Report Number(s):
- FNAL-TM-1799; ON: DE93004712
- Country of Publication:
- United States
- Language:
- English
Similar Records
Sampling nonuniformity in the SDC calorimeter EM/HAD boundary
Sampling nonuniformity in the SDC calorimeter EM/HAD boundary
Related Subjects
SHOWER COUNTERS
CALIBRATION
COMPTON EFFECT
MONTE CARLO METHOD
BASIC INTERACTIONS
CALCULATION METHODS
ELASTIC SCATTERING
ELECTROMAGNETIC INTERACTIONS
INTERACTIONS
MEASURING INSTRUMENTS
RADIATION DETECTORS
SCATTERING
440104* - Radiation Instrumentation- High Energy Physics Instrumentation