Update #2 on the TCLink evaluation for the ATLAS

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Update #2 on the TCLink evaluation for the ATLAS
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Update 2 on the TCLink evaluation for the ATLAS Phase-2 TTC distribution Paschalis Vichoudis (CERN) on behalf of the ATLAS Central Trigger team 13th HPTD Interest Group Meeting , 08-Nov-2022 ATLAS TTC PHASE-II 40 LTIs 600 LTI links 2

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Update #2 on the TCLink evaluation for the ATLAS Phase-2 TTC distribution Paschalis Vichoudis (CERN) on behalf of the ATLAS Central Trigger team 13th HPTD Interest Group Meeting , 08-Nov-2022<br>
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ATLAS TTC
PHASE-II ~ 40 LTIs
~600 LTI links 2<br>
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PREVIOUSLY link to previous report
Shown an improved testbench using new FMC and Firefly optics
Long measurements (10k over 3 days) revealed worse phase uncertainty than before -> ~30ps peak-to-peak for 1 hop
The distribution of the phase uncertainty was not gaussian -> therefore using sigma as figure of merit was not applicable
No correlation between after-reset phase uncertainty and DDMTD measurement -> impossible to compensate the initial offset based on DDMTD
Phase uncertainty not acceptable for certain ATLAS detectors -> HGTD, LAr 3<br>