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Synchronization Parameters for SPD and L0A Data Acquisition System

This document outlines the official triggering and timing parameters for the SPD and L0A components in our data acquisition system. With a primary focus on the Delta timing adjustments, it specifies the required delays in nanoseconds for beam passage times and the configuration settings for optical splitters and scintillators. Key time delays include 450 ns for the SPD and adjustments of 4 µs for L0A and VELO. The goal is to ensure accurate data collection and coherence between the various system components, optimizing performance and reliability.

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Synchronization Parameters for SPD and L0A Data Acquisition System

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  1. Official Plan • Take data with the SPD generated trigger. Delta t = 7.5 CLK + 50m fibre = 450 ns T0 Beam passage time SPD Have to delay by extra 150-175ns. T0 + SPD(L0A) L0A generated by Odin Delta t = 2CLK + 100m fibre = 550 ns L0A Arrival to CAL FE Already Set to 4 us! Add 4 us! 15 m TOF=2CLK L0A Arrival to Velo FE T0 Beam passage time VELO L0 arrival to the VELO

  2. backup Plan • Use our ownn scintillators T0 Beam passage time through velo T scintilator deltaT0 Known deltaT1 Known L0A after Optical splitter. L0A Arrival to Beetles deltaT2 Known Set this to 4 us! deltaT3 Data cables. deltaT4 Measure Data arrival to the TELL1

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