DUNE timing system Stoyan Trilov, University of Bristol DUNE UK Meeting 11/12/2019 1
Outline § DUNE timing system –Requirements –Design –Hardware –CCM –Summary 11/12/2019 2
DUNE timing requirements § Clock alignment within a detector module: 𝑃(1 𝑜𝑡) § Clock alignment between detector modules: 𝑃(1 𝑛𝑡) – Interface between single phase and dual phase timing systems (different) – Enables formation of supernova triggers § Receive beam information from beam timing system: 𝑃(1 𝜈𝑡) – Absolute time alignment § Single phase timing system (SPTS) (this talk) § Dual phase timing system (DPTS) (White Rabbit, not in this talk) 11/12/2019 3
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/ 11/12/2019 Combiner 4 Single Phase Readout Components on Cryostat
DUNE single phase timing system § GPS disciplined oscillator provides a 10 MHz clock and UTC code GPS Receiver IEEE1588 (White Rabbit) DAQ & + IEE1588 NTP to Dual Phase Run Control Grand Master 10 MHz IRIG-B § Both signals fed into a “master” card hosted in a 𝜈 TCA crate uTCA Crate 12 full-height Timing Timing Timing Timing Timing Timing Timing Timing Timing Timing Timing Timing double width AMC Master FMC FMC FMC FMC FMC FMC FMC FMC FMC FMC FMC FMC § Clock/commands distributed to 12 fan-out cards using the 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 𝜈 TCA crate backplane 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) § Each fan-out card hosts 2 timing mezzanine cards (FMC) 1000Base-BX single mode fibre Setup/Control/Monitoring ( 1 GBit/s ) Experiment § Each FMC has four optical connectors Network Direct Attach Cable Direct attach cable to hot-swap system § 12×2×4 = 96 optical outputs Fibre to hot-swap system Crates in CUC – 1:8 optical splitters → 96×8 = 768 fibres 1:2 Passive Optical Splitter/ Combiner § Develop prototype for ProtoDUNE run 2 (2021) 1000Base-BX 1:8 Passive Optical Splitter/ Combiner 11/12/2019 To timing endpoints on Cryostat 5
DUNE SPTS hardware status § Necessary prototyping hardware is being ordered } – 𝜈 TCA crate: Schroff 11890-170 – MCH (crate and daughter card (AMC) control and management: N.A.T. ordered – Two (redundant) crate power supplies: N.A.T. NAT-PM-AC600 – JTAG module: NAT-JSM-FPOSF } – AFC module (fan-out card) https://ohwr.org/project/afc – GPS disciplined oscillator being ordered – Timing FMCs (ProtoDUNE-like) Ø (DAQ kits) 11/12/2019 6
DUNE timing system and CCM § CCM meeting dedicated to timing on 13/11/19: Debug and CCM https://indico.fnal.gov/event/22410/ development – Kick off discussion on timing/CCM interface § Some of the major discussions: – Should we view the timing system as infrastructure? Timing system control software – How does timing system redundancy kick in? – What happens to the endpoints during failover Commands period? Information – How does the timing system deal with malfunctioning endpoints? Debug Hardware/firmware information/ commands 11/12/2019 7
Summary § DUNE timing system – Hardware purchasing in progress – Review of interface documents – Prepare prototype for ProtoDUNE run 2 (2021) § ProtoDUNE timing system – Implementation/testing of foreseen features, auto-delay adjustment Ø Test setup at Bristol – New batch of timing FMCs 11/12/2019 8
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