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Summary of Key Operations and Investigations for LS1 Activities on 28/02/2013

This document outlines the key activities and investigations conducted during the LS1 operations meeting held on 28th February 2013. Key topics include the review of Claudio's cooling presentation, updates on power supplies intervention, and investigations into the FEROM system. Modifications on low voltage systems to reduce common mode oscillation were addressed, alongside a schedule for replacing 17 power supplies in 2012 and planning for the remaining supply modifications. Additionally, discussions on radiation impact and DDL/LDC dynamic handling were conducted, with designated personnel and estimates outlined.

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Summary of Key Operations and Investigations for LS1 Activities on 28/02/2013

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  1. SSD LS1 activities ITS Operation Meeting 28/02/2013

  2. LS1 Activities: Summary • Cooling: see Claudio presentation • PowerSuppliesIntervention • FEROM Investigation • DDL/LDC missingdynamichandling

  3. PowerSuppliesIntervention • Low voltage: modificationtodecrease the common mode oscillation • 17 PS replacedduring 2012 TS • Remaining 127 PS tobemodifiedduring LS1 Who: Massimo + Ton fordismount and re-mount Time estimate: • ~ 1 week todismount and bringto the surface (March ALICE week by me and Ton) • then sent to CAEN formodification (20/30 per month back) • then 2-3 monthsintegratedto test in lab and installthemagain Resourcesneeded: • DAQ and DCS neededto the finaltests

  4. FEROM Investigation • Check on the correlation between radiation level (and integrated dose) and the problems on our FEROMs • If needed, taking into account the higher radiation level in the Run 2, replacement/upgrade of the whole FEROM system • TBC Who: Massimo (Investigation) Expected time: ~ 1 week to complete the investigation + no time estimate for the intervention if any

  5. DDL/LDC missing dynamic handling • Who: no people available at the moment • Time estimante: no time estimate

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