Procedure for Running ATLAS during Quiet Beams


placeholder, please the relevant experts fill/correct the table below thanks

Introduction

We define running in Quiet Beams as follows: ATLAS taking physics data beinf Ready4Physics, i.e. with all sensitive detectors ON/READY (including PIX/IBL, SCT, MUON) while LHC is not Adjusting the beam but is not delivering the STABLE BEAMS flag. This is required in particular for the beta*=90m elastic run when the ALFA and TOTEM roman pots are placed very close (~5sigma) to the beam.

Manual operations are required:

  • On the relevant detector to Manually turn ON the detector,
  • DCS not to override the TDAQ STABLE MEANS (which is off during QUiet Beams)
  • TDAQ to force in IS the REady4Physics Flag.

This mode is expected to be used Monday October 12th

Subsystems and Actions

Sub-System Short Description of action Action for Start of Quiet Beams Action at Stop of Quiet Beams People to be contacted and when
DCS Remove DIM publishing of stable beams flag and beam mode in LHC project, will leave IS entries for both parameters in initial partition static, on-call expert should use expert panel GCS/expertPanels/disconnectDcsRunControlLinkForStableBeams.pnl in ATLGCSLHC un-publish re-publish DCS on-call when quiet beam conditions are reached
TDAQ Set StableBeamsFlag to 1 into IS run script /det/tdaq/scripts/set_stable_beams.py 1 run script /det/tdaq/scripts/set_stable_beams.py 0 DAQ on call 5 minutes before being ready to do the operation
PIX/IBL
SCT Force HV ramp up Disable SCT Beam protection by SCT Run Coordinator, then turn on HV by ID shifter Enable SCT Beam protection by ID shifter SCT Run Coordinator
MUONS Force HV override Force HV Override and GOTO_READY restore HV operation and/or GOTO_STANDBY Muon Run Coord
ALFA      

  • For any new request or update please contact the Run manager phone: 75870 [Call this first to get in touch with Run Coordination]
  • Alessandro (16-1801) and Alex (16-5636)

-- Main.apolini - 2015-10-09

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Topic revision: r4 - 2015-10-09 - stefan
 
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