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MIPPCalibrationMain

MIPP Detector Calibration

<under construction>

Summary: Calibration is the lowest level, the first step in event reconstruction. The various MIPP detectors read out into adcs, tdcs, scalers, and slow control devices. Adcs need to have pedestals and gains determined, tdc need time offsets and in general conversion from tdc channels to time in ns or ps. We do not attempt to determine the conversion from tdc channels to time from event data.

Here the calibration procedure and the dependencies between various steps are explained. In general, the adc pedestals can be determined in pass1. A T0 time offset calibration is done in pass1 (subrun by subrun). This is actually a third order polinomial over event time (sec) to correct for temperature dependence in cable delay. The T0 offset corrections for pusle height are done run by run (or several runs) in a second step. Also track position inside the 2"x2" scintillator is relevant. Other tdc timing offsets (other than T0s) can only be determined once T0 time is calibrated.

List of detectors and their calibration tables in calib db:

• Trigger system: tdcs for latch word bits, trigger word bits, ...

• T0s (T00, TBD, T01): 12 adcs, 20 tdcs (multi-hit and high resolution for T00 and T01)

• BCkov: 4 adcs, 4 tdcs adc pedestals in pass 1, tdc calib needs single beam tracks, i.e. later pass.

• BCs: tdcs
• target: (NuMI target beam position monitor)
• ScInt: 1 adc, 1 tdc
• TPC: <add later>
• DCs: tdcs
• Ckov: 96 adcs, 96 tdcs

• ToF: 54 ToF bars with 2 adcs and tdcs each, two calibration bars with adcs and tdcs each

• RICH: pmt latches
• EMcal: adcs
• Hcal: 8 adcs
• muon paddles: (only used for special trigger)