velo hardware and commissioning
DESCRIPTION
VELO hardware and commissioning. installation status ECS and Tuning VELO-detector status DAQ aspects Spares. Installation. PLATFORM C3. + motion control. 2 detector halves with each 21 individually commissioned VELO-modules are installed in the VELO-vessel since Oct. ’07 - PowerPoint PPT PresentationTRANSCRIPT
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26 January 2009 VRR09 Eddy Jans 1
VELO hardware and commissioning
• installation status• ECS and Tuning• VELO-detector status• DAQ aspects• Spares
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26 January 2009 VRR09 Eddy Jans 2
InstallationPLATFORM C3 + motion control
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26 January 2009 VRR09 Eddy Jans 3
• 2 detector halves with each 21 individually commissioned VELO-modules are installed in the VELO-vessel since Oct. ’07 • 2*42 Repeater boards• 2*7 Control boards• 2*42 TELL1’s with 4 ARx cards each• 2*3 Temperature boards• 10+11 A3009 CAEN LV-modules, 3*48 V power supply• 2*3 EHQ 607n-F Iseg HV-modules• 2*1 Maraton power supply• 1 Interlock Box• vacuum system + PLC-system for control• motion system + PLC-system for control• cooling plant + PLC-system for control
All installed, cabled and debugged individually and later operated collectively.
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26 January 2009 VRR09 Eddy Jans 4
• 84 (100%) working HV-channels• 84 (100%) working LV-channels• 84 (100%) working Control Board channels• 336 (100%) working Temperature Board channels• 84 (100%) working Repeater Boards• 80 (95%) working TELL1s. This week 84 (100%) • 170.0k (98.8%) usable strips. Consistent method to measure and determine dead/noisy strips is under construction.
Ancillary equipment and silicon sensors
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26 January 2009 VRR09 Eddy Jans 5
ECS and Tuning• Individual PVSS-projects developed over the last 3 years• Collection of projects and FSMs operational since 8 months• Continuously under development. Main remaining points: - Tuning of the timing: * ADC sampling point Done * Trigger and TestPulse via Control Board and TELL1 - TELL1 recipes: default, TP, NTP, ZS, NZS, ErrorBanks - Tuning of the gains - Improve on the OPC-server of Iseg - Extend software interlocks - Develop procedures for data taking, analysis, parameter determination, upload via XML-description to hardware and database.Concerns: experienced VELO-manpower, TELL1 supportPlanning: ready by May 1
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26 January 2009 VRR09 Eddy Jans 6
• Internal progress reports and discussions in the weekly VELO-commissioning meeting. Also used for planning of activities for coming week(s). (minutes, project plans, etc.)
• Invested a lot of effort in writing documentation, operation manuals, power-up/power-down procedures and VELO-shifters training See: https://lbtwiki.cern.ch/bin/view/VELO/VELOOperatingManuals
• ELOG and databases play a more and more important role
Organization and documentation
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26 January 2009 VRR09 Eddy Jans 7
VELO statusVacuum
complex system of pumps,valves and gauges toprovide:- good and reliable vacuum in LHCb beam pipe and VELO-detector- maintain small diff. pressure between the two volumes during pump down and venting
Functioned continuously according to specs during the last 2 years and various pumping/venting cycles.
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26 January 2009 VRR09 Eddy Jans 8
Pumpdown on June 18, 2008
10-8
10-6
10-4
10-2
[mbar]
detector volume
beam volume
after2 months
of pumping
2x10-6
3x10-90h00 12h006h00
It takes 3 hours till green big valve GV302 may be opened
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26 January 2009 VRR09 Eddy Jans 9
Motion
• Actual movement is controlled by a PLC-program
• Precise position is given by 3 resolvers: XA, XC and Y
• Reproducibility <10 m
• Interlocked with LHC beam abort system.
C-side
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26 January 2009 VRR09 Eddy Jans 10
Con
dens
er
PumpHeat exchanger
evaporatorRestriction2-Phase
Accumulator
Hea
t in
Hea
t in
Hea
t out
Hea
t out
shielding wall VELO
detector
coolingplanton C3
Cooling
800 W cooling power/side available,while ≈400 W is needed
60 m
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26 January 2009 VRR09 Eddy Jans 11
10 15 20 25 30 35 40 45 50 55 60 65 70-50
-40
-30
-20
-10
0
10
20
30
Time (Hours)
Tem
pera
ture
(ºC
)
- 30
20
10
0
-10
-20
- 40
T [oC]
module base
rf-foil
setpoint
silicon
without heat load
- setpoints tested: 0, -10, -20, -25 and -30 oC- powering a module leads to an increase of Tsilicon of
16oC - cooling system worked reliably for months within specs- additional feature of cooling at +10 oC with backup chiller
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26 January 2009 VRR09 Eddy Jans 12
R-sensor -sensor
____ raw noise____ Common Mode Corrected noise
Noise performance of fully depleted sensors
Detector performance
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26 January 2009 VRR09 Eddy Jans 13
Noise of collective power-up of VELO in the pit
all R-sensors all-sensors
- No additional noise contribution due to collective powerup- Influence of nearby passing beam still needs to be seen
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26 January 2009 VRR09 Eddy Jans 14
S/N from ACDC3R-sensors -sensors
- Noise measured in ACDC3 ≈ that in IP8- Experimental setup and settings used in ACDC3 very comparable to those in IP8. So comparable gain expected (S/N)pit ≈ (S/N)ACDC3 (to be confirmed with TP-data)
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26 January 2009 VRR09 Eddy Jans 15
DAQList of main items being worked on:
• NZS-data (151 kB/side) and round robin mechanism (select mode, data rate, etc. Ready by April 1)
• run at high rate (# of TELL1s, network, # farm nodes, TAE factor. Investigation ready by April 1)
• error banks: generation, inspect contents, possibility to generate NZS data if error bank present (Ready by April)
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26 January 2009 VRR09 Eddy Jans 16
Lab 8
The need to be able to testthe electronics of a VELO-slicein the on-line environment made us set up “Lab 8” in theVELO-office on the secondfloor above the LHCb controlroom. Now we have a testing and development area, decoupled from the real VELO-detector.
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26 January 2009 VRR09 Eddy Jans 17
Spares situation
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26 January 2009 VRR09 Eddy Jans 18
Summary
Commissioning of the VELO-detector is well advanced.
Main things still to be finished are:- Create sufficient hot spares of all crucial components- Development of tuning scripts (timing, gain, bad strip list), parameter determination and corresponding uploading to hardware and databases- Increase % of working channels (mainly TELL1s)- DAQ action list: NZS-data, high rate, error banks