CCDB Tables FDC
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Contents
Variations
No interesting variations at the moment.
Tables
FDC/timing_offsets
| 1-3522 | timing offset, t0 (ns) |
FDC/fdc_parms
| FDC_DRIFT_SPEED | 0.0055 | electron drift velocity |
| FDC_WIRE_DEAD_ZONE_RADIUS | 3.5 | dead wire radius |
| FDC_STRIP_DEAD_ZONE_RADIUS | 5.0 | other dead wire radius |
| FDC_ACTIVE_AREA_OUTER_RADIUS | 48.5 | |
| FDC_ANODE_CATHODE_SPACING | 0.5 | |
| FDC_TWO_HIT_RESOL | 25. | |
| FDC_WIRES_PER_PLANE | 96 | |
| FDC_WIRE_SPACING | 1. | |
| FDC_STRIPS_PER_PLANE | 192 | |
| FDC_STRIP_SPACING | 0.5 | |
| FDC_STRIP_GAP | 0.1 | |
| FDC_MAX_HITS | 100 | |
| FDC_K2 | 1.15 | |
| FDC_STRIP_NODES | 3 | |
| FDC_THRESH_KEV | 1. | threshold in keV |
| FDC_THRESH_STRIPS | 5. | threshold in pC |
| FDC_ELECTRON_CHARGE | 1.6022e-4 | electron charge in fC |
| FDC_DIFFUSION_COEFF | 1.1e-6 | diffusion speed cm^2/s --> 200 microns at 1 cm |
| FDC_TDRIFT_SIGMA | 3.6363636e-9 | The error on the drift time in the FDC, used to gaussianly smear incoming hits |
| FDC_CATHODE_SIGMA | 150.0 | The error in the distance along the wire as measured by the cathodes (NOT including Lorentz effect, but including fluctuations due to ion trail density, in microns) |
| FDC_PED_NOISE | 0.0 | The FDC pedestal noise is used to smear the cathode ADC values such that the position along the wire has the resolution specified by FDC_CATHODE_SIGMA, units in pC (calculated from FDC_CATHODE_SIGMA in SmearFDC) |
| FDC_TIME_WINDOW | 1000.0E-9 | Time window for acceptance of FDC hits units in seconds |
| FDC_HIT_DROP_FRACTION | 0.0 | Fraction of FDC hits to randomly drop (0=drop nothing 1=drop everything) |
Deprecated
The following tables should not be used anymore:
- FDC/fdc_drift2
- FDC/lorentz_deflectionsMarch2007
