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ToF Readout Upgrade. Jamal Rorie 1/31/06 Physics 476. Background. Particles exit the beam chamber with known momentum ToF allows us to determine the mass of the particle Luminosity of beam has increased 2-fold. Overview. Board Overview. Fast PMT (input) Rise Time ~ 4ns Fall Time ~ 8ns - PowerPoint PPT Presentation
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ToF Readout UpgradeToF Readout Upgrade
Jamal RorieJamal Rorie
1/31/061/31/06
Physics 476Physics 476
BackgroundBackground
Particles exit the beam chamber Particles exit the beam chamber with known momentumwith known momentum
ToF allows us to determine the ToF allows us to determine the mass of the particlemass of the particle
Luminosity of beam has increased Luminosity of beam has increased 2-fold2-fold
OverviewOverview
1: 3 spl i t 1:3 spl i t
Leadi ng Edge
Di scri m. wi th
l ow threshol d
Leadi ng Edge
Di scri m. wi th
hi gh threshol d
Leadi ng Edge
Di scri m. wi th
l ow threshol d
Leadi ng Edge
Di scri m.wi th
hi gh threshol d
ADCADCHPTDC HPTDCMean Ti mer
PMT2PMT1 176 Barrel TOF
L1 Tri gger L1 Tri gger
To Tri gger Modul e
gate gate
L1 TriggerL1 Trigger
PMT PMT
Board OverviewBoard Overview
SpecsSpecs
Fast PMT (input)Fast PMT (input)• Rise Time ~ 4nsRise Time ~ 4ns• Fall Time ~ 8nsFall Time ~ 8ns• Pulse Magnitude <~4 VPulse Magnitude <~4 V• Trigger Rate up to Trigger Rate up to
1kHz1kHz
Board RequirementsBoard Requirements• Charge MeasurementCharge Measurement
– 1GSPS or greater1GSPS or greater– Negligible dead time Negligible dead time
(ping pong)(ping pong)– 16 channel in16 channel in
• Time MeasurementTime Measurement– Low and high Low and high
thresholdthreshold– 16 channel in16 channel in– 25 ps resolution25 ps resolution
• COPPER outCOPPER out
PartsParts
HPTDCHPTDC Lab 3Lab 3 Spartan 3Spartan 3
GoalsGoals
Board by 3/3/06Board by 3/3/06 Firmware by 4/7/06Firmware by 4/7/06 Testing done by mid-MayTesting done by mid-May