Post on 21-Dec-2015
transcript
Data CollectionData Collection
TDC
Leading EdgeLo Level
Discriminator MeanTimer
1:3 Splitter
ADC
Leading EdgeHi Level
Discriminator
Leading EdgeLo Level
Discriminator
TDC
1:3 Splitter
Leading EdgeHi Level
Discriminator
ADC
PMT PMT
Timing Scheme Timing Scheme
Hi level - event triggerHi level - event trigger
Lo level - higher time resolutionLo level - higher time resolution
Timing Scheme (cont.)Timing Scheme (cont.)
Current System: stretch interval between TOFFEE “T” Current System: stretch interval between TOFFEE “T” pulse rising edge and rising edge of a reference signal. pulse rising edge and rising edge of a reference signal. Measure stretched time.Measure stretched time.
New System: use HPTDC in high resolution mode to New System: use HPTDC in high resolution mode to time the rising edge from the TOFFEE “T” pulse.time the rising edge from the TOFFEE “T” pulse.– 4 TDC channels take measurements, result is interpolated.4 TDC channels take measurements, result is interpolated.– More info on high resolution mode in HPTDC Manual on pp 7-8.More info on high resolution mode in HPTDC Manual on pp 7-8.
Q Measurement Q Measurement
Current System: send directly into LeCroy 1877S, Current System: send directly into LeCroy 1877S, convert to timeconvert to time
New System: send to ADC block on STaRNew System: send to ADC block on STaR– ShaperShaper– LABRADOR3LABRADOR3
Readout SchemeReadout SchemeEvent trigger received
by STaR
Logic request to HPTDC
HPTDC polls for “hit” around requested time
HPTDC sends data,Logic queries LAB3
No HPTDC data,Logic doesn’t query LAB3
LAB3 sends data
COPPER I/O carries data downstream
Hit No Hit
COPPERCOPPER
COmmon COmmon Pipelined Pipelined Platform for Platform for Electronics Electronics ReadoutReadoutOne One standardized standardized card can card can control up to 4 control up to 4 boardsboards
ADC BlockADC Block
LABRADOR3LABRADOR3– 12 bit data readout12 bit data readout
Shaper to elongate signalShaper to elongate signal– Originally 3 GSPSOriginally 3 GSPS– Now 100-300 MSPSNow 100-300 MSPS
TestingTesting
Shaper TestShaper Test– Elongation goodElongation good– Standard delayStandard delay
confirmingconfirming
TasksTasks
CurrentlyCurrently– Firmware developmentFirmware development
AheadAhead– Software developmentSoftware development– Firmware testingFirmware testing– FinalizationFinalization– KEK observations (mid-July)KEK observations (mid-July)