Implications for timing system of possible CUC Cryo-Mezzanine move - PowerPoint PPT Presentation

Implications for timing system of possible CUC → Cryo-Mezzanine move David Cussans Upstream DAQ regular meeting 14/Jan/20

Current Plan • Cross-check and hot-swap redundancy by  Two antenna (on at top of each shaft)  Two GPS receivers in CUC  Normally one antenna-→ one GPS receiver ● Cross check between two systems  Option of third, free-running, Rb/Cs clock to act as “tie breaker” if two systems start to diverge. • All four modules SP, DP, MoO served from CUC 2 Presenter Name | Presentation Title

What is the Issue? • Moving DAQ out of one central location breaks current scheme ● Proposal being considered: one “DAQ hut” for each module • Number of different solutions. Three considered 1)Install current scheme in one of the four DAQ huts and run fibres to other 3 * Not nice - lots of fibre… 2)Keep GPS receivers in CUC in a small rack 3)Put GPS receivers on surface * Advantages - remove need for analogue transmission of GPS signals (reduces cost) - puts more electronics on surface where it is more easily accessible. * Disadvantages - Need more microTCA crates ( 2 per SP detector) - Need more fibres down shaft (but we should have many) 3 Presenter Name | Presentation Title

GPS on surface Ross Yates GPS Receiver... GPS Receiver... 10 MHz IRIG-B 10 MHz IRIG-B Ethernet... GPS Interface GPS Interface Surface IEEE1588... IEEE1588... links... 1000Base-BX... DAQ "Hut" on SP Cr... link to Yates link to Ross DAQ &... uTCA Crate... Timing... Timing... Timing... Timing... Timing... Timing... Master... Timing... Timing... Timing... Timing... Timing... Timing... Master... AMC AMC AMC AMC AMC AMC AMC AMC AMC AMC AMC AMC Timing... Timing... Timing... Timing... Timing... Timing... MCH Timing... Timing... Timing... Timing... Timing... Timing... MCH 1000Base-BX... Setup/Control/Monitoring ( 1 GBit/s ) Experiment... Direct... Direct attach cable... Fibre to hot-swap system Crates in DAQ Hut 1:2 Passive... 1000Base-BX To timing endpoints... 1:8... 4 Presenter Name | Presentation Title

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Content • Topic 1 more text - Sub-topic 1.1 • Sub-sub 1.1.1 - Sub-sub-sub topic 1.1.1.1 - Sub-topic 1.2 • Topic 2 • Topic 3 6 Presenter Name | Presentation Title