View source for 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: [http://www.nikhef.nl/pub/experiments/bfys/lhcb/vertex/documents/projects/VeloUpgradeModules/LHCb_ModuleProduction4VELO.Upgrade_2016_plan.160201.pdf 2016]
* timeline (gantt chart): [http://www.nikhef.nl/pub/experiments/bfys/lhcb/vertex/documents/projects/VeloUpgradeModules/VeloModulesTimeline20160908.pdf 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?

=== 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)