Upgrade/VeloModules

Under construction

Communication

• This wiki: https://wiki.nikhef.nl/lhcb/Upgrade/VeloModules
• ELOG: https://webapps.nikhef.nl/elog/VELO_Upgrade_Cooling_VELOpix/
• Progress reports in MT meetings: http://www.nikhef.nl/pub/experiments/bfys/lhcb/vertex/documents/minutes/
• OPP reports: http://www.nikhef.nl/pub/experiments/bfys/lhcb/vertex/documents/oppreports/VeloUpgradeModules/
• LHCb Velo upgrade web page: https://lbtwiki.cern.ch/bin/view/VELO/VELOUpgrade
• photographs:
  • http://www.nikhef.nl/pub/departments/mt/projects/lhcb-vertex/production/

Documentation

• project plans: 2016
• timeline (gantt chart): 2016

Setup for module production QA (last update 22/9/2016)

There are two tests:

1. quick electrical test ("20 seconds"), mainly to check that wirebonds are ok. This test should take place in the clean-room. For this we need:

• LV (incl. PC for controls?)
• DAQ
• fibers to connect to DAQ
• database to summarize results

2. burn-in test ("24 hours"). For this we need:

• LV
• HV (till 1000V; must have precise current control/monitor )
• PC with PVSS to control LV and HV
• DAQ
• fibers to connect to DAQ
• PC to run data analysis (needs to happen in real time as data volumes are very large)
• database to summarize results
• 19 inch rack
• CO2 cooling
• vacuum tank
• if not in the cleanroom, a 'tent' to protect setup

DAQ system

We will have only one DAQ system, the so-called 'mini-DAQ'. A system consists of a PCI express card in an ASUS ESC 4000 G3 server PC. (See https://www.asus.com/us/Commercial-Servers-Workstations/ESC4000_G3/). As we have only one system, we either need to do both tests in the same place, or pull fibers.

CO2 Cooling

A lot of what we do depends on where we do test 2. If we do it in the clean room, then we need a blow system for the CO2. If we do it in the vacuum lab, then we need to pull a lot of optical fibers. To take this decision, we need to understand:

• when is the blow system available? how often do we need to change bottles? is bottled CO2 dry and clean enough? is a blow system with cryogenic CO2 an option?
• is the standard CO2 cooler reliable enough?

Information for cooling and test location decision:

• Ground plan N025 & H026: http://www.nikhef.nl/pub/departments/mt/projects/lhcb-vertex/VELOupgrade/Plattegronden_N025&H026.pdf

Schedule / action list

Things that we can prepare before the decision on the location of test 2:

• finish the vacuum tank (Q4 2016)
• collect LV and HV units, 19 inch rack (Q4 2016)
• configure the PC for LV and HV controls (Q1 2017? does this make sense if we do not have a module yet?)
• prepare DAQ system (Q1 2017)