CMS Endcap Resistive Plate Chambers
description
Transcript of CMS Endcap Resistive Plate Chambers
CMS Endcap Resistive Plate Chambers
Andrey Marinov
On Behalf Of
CMS Collaboration.
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• CERN
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Compact Muon Solenoid
Endcaps
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Endcap RPC Schema
Final Gas mixture used in all tests95.5 Freon 3.5 Isob 0.3 SF6 + RH 50% = 5000 ppm
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Electrical Schema
• 96 Channels. 3 sectors, 32 each
• Standard LVDS output
• Controlling and monitoring of FEB threshold
• Monitoring of FEB temperature
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BakelitePurchase Italy
Cut Clean Ship to Korea
Gaps Built in Seoul QC Ship to CERN
FEBs, Adaptor / DistributionBoards
Procure from ItalyOrder from Pakistan
Test in Italy Ship to CERN
Chamber Assembly
ISR Lab @ CERN QC Construction Database
Storage @ X5 Installation@SX5ProductionDatabase (CMS)
Mechanics Kit prep in China Procurement Cables and pieces
Shipped to CERN
Production Flow Process
http://cern.ch/cms-isr-endcap-rpchttp://cern.ch/rpc-endcap
CommissioningCOM1 & COM2
Dec 2003
Dec 2004
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Production Of HV Gaps
KODEL
KODEL
•
• Seul – South Korea
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The Assembly Lab At CERN - ISRGap QCChamber QC
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http://cern.ch/cms-isr-endcap-rpc
Some Technological Steps
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Testing Of Endcap RPC with Cosmic Rays
• Cosmic Stand.
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Trigger ConfigurationCounters Setup
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TriggerElectronics Setup
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DAQ
Run Signal
Recording
EnableTrigger
RecordingStop recording
Reading the TDCs
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Cosmic Test ComputingDAQ PC Database PC
MXI bus
TCP/IP
TCP/IP
Tracking PC
CAEN 1527HV power supply
TCP/IP
I2C MultiplexerFor slow control
RS232
Control PC
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Cosmic Test DataStrips Profile
Strips Profile taken with only 2 scintilators from the top and bottom layers.
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Cosmic Test DataStrips Profile
Including a small 50cm counter.
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Cosmic Test DataTime Distribution
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Cosmic Test Noise Profile
triggers
noisenoiserate N
NN
stripratestrips
noiserate NN
/32
Noise and Time distribution
Time bins 0-128 (1bin is 10ns)
Counts400ns
60ns
Noise
Noise
]/[]/[
]/[
22
2
1
1.
1.
cmHzcmHz
runstripsnoisecmHz
R
TSNR
239
119
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Efficiency and Cluster Size
Scanning for efficiency and cluster size on a different voltages [8kv-9.6kv]
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Cosmic Stand – Muons Tracking
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HV Long Term Monitoring
Take sample of the current of each 2 minutes.
Take sample of the environmental conditions at the same time
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Endcap RPC Databasehttp://forwardrpc.cern.ch/cms_forward_rpc/index.htm
Online • HV monitoring and QC IV
data storage• Searchable tracking for
individual Gaps / Chambers
• Production QC procedures • Mechanics• Cosmic Tests
VISIBLESEARCHABLEWORLDWIDE
Chamber QC data Gas gaps QC data
Environment conditions data
DATABASE
Production data
Results form Cosmic Test
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SX5 – CMS home
Cessy – France
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CMS YB-1
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YB+2 Lowering In CMS Cavern
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Future Plans
• Set Up the endcap RPC readout and controlling – Link Boards and Control Boards
• Lowering the YB-1 – probably in the end of 2007.
• Starting the LHC – 2008
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Thank You For Your Attention
• For more details about CMS
http://cms.cern.ch