DUNE timing system Stoyan Trilov, University of Bristol Upstream DAQ meeting 29/10/2019 1
Outline § ProtoDUNE timing system – Plans and activities § DUNE timing system – Requirements – Design – On-going activities 29/10/2019 2
ProtoDUNE timing system § Some testing and characterisation still to be performed – Clock alignment using signal delay measurement – Clock characterisation § Production of more timing FMC – Will be used in DAQ kits 29/10/2019 3
DUNE timing system requirements § 𝑃(1 𝑜𝑡) synchronisation within detector module § 𝑃(1 𝑛𝑡) synchronisation between detector modules → SNB trigger § 𝑃(1 𝜈𝑡) absolute accuracy → beam instrumentation sync § Fan-out timing signals to SP detector § Provide timing signal to DP detector White Rabbit network § Timestamp beam instrumentation signals on SPTS clock domain 29/10/2019 Single Phase Timing System 4
DUNE timing system § GPS disciplined oscillator provides 10 MHz clock GPS Receiver IEEE1588 (White Rabbit) DAQ & + IEE1588 NTP to Dual Phase Run Control Grand Master 10 MHz IRIG-B § Based around a master timing card hosted in a uTCA Crate 𝜈 TCA crate 12 full-height Timing Timing Timing Timing Timing Timing Timing Timing Timing Timing Timing Timing Master double width AMC FMC FMC FMC FMC FMC FMC FMC FMC FMC FMC FMC FMC Timing Each AMC with (4x (4x (4x (4x (4x (4x (4x (4x (4x (4x (4x (4x Card two FMCs SFP) SFP) SFP) SFP) SFP) SFP) SFP) SFP) SFP) SFP) SFP) SFP) AMC AMC AMC AMC AMC AMC AMC AMC AMC AMC AMC AMC § Clock distributed to 12 fan-out cards using 𝜈 TCA Timing Timing Timing Timing Timing Timing Timing Timing Timing Timing Timing Timing FMC FMC FMC FMC FMC FMC FMC FMC FMC FMC FMC FMC MCH (4x (4x (4x (4x (4x (4x (4x (4x (4x (4x (4x (4x SFP) SFP) SFP) SFP) SFP) SFP) SFP) SFP) SFP) SFP) SFP) SFP) backplane (dual-star topology) 1000Base-BX single mode fibre § Each fan-out card hosts 2 timing FMCs Setup/Control/Monitoring ( 1 GBit/s ) Experiment Network Direct Attach Cable Direct attach cable § Each FMC has four optical connectors to hot-swap system Fibre to hot-swap system § 12×2×4 = 96 optical outputs Crates in CUC 1:2 Passive Optical – 1:8 optical splitters → 96×8 = 768 fibres Splitter/ Combiner 1000Base-BX § Develop prototype for ProtoDUNE run 2 (2021) 1:8 Passive Optical Splitter/ Combiner 29/10/2019 To timing endpoints on Cryostat 5
Timing RF to RF to Timing Endpoint Optical Optical Endpoint Surface Single mode fibre Single mode fibre Single mode fibre Single mode fibre (calibrate time delay (calibrate time delay down shaft) down shaft) Dual Phase Readout Components Optical Optical to RF to RF • High availability (redundancy) White Rabbit GPS Receiver IEEE1588 IEEE1588 GPS Receiver Timing Network + PTP Grand Master 1000Base-BX 1000Base-BX + PTP Grand Master (Dual Phase) • 2 GPS antennas IRIG NTP IRIG 10MHz NTP 10MHz NTP • 2 GPS disciplined oscillators • 2 𝜈 TCA crates (hot spare) Single Phase Single Phase/ Dual Phase Single Phase/Dual Phase Single Phase Timing System Cross Check Cross Check Timing System Direct Attach (copper) cables Single mode fiber Single mode fiber Single Phase Readout Passive Components Splitter/ x 150 in CUC Combiner 1000Base-BX Passive Splitter/ 29/10/2019 Combiner 6 Single Phase Readout Components on Cryostat
Activities summary § ProtoDUNE timing system – Continuing support – Testing of previously untested features, auto-delay align – New batch of timing FMCs https://ohwr.org/project/afc ? Quotations from vendors on-going § DUNE timing system } integrate – Purchase 𝜈 TCA crate and FMC carried card (AMC module) – Purchase GPS disciplined oscillator – Prepare prototype for ProtoDUNE run 2 (2021) 29/10/2019 7
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