nec varna sep 12-18, 2005 a. marinov andrey marinov on behalf of the cms forward rpc collaboration...
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NEC Varnasep 12-18, 2005
A. Marinov
Andrey Marinov On behalf of the CMS Forward RPC Collaboration
Y. Ban, J. Cai, H. Liu, S. Qian, Q. Wang, Y. Ye, J. Ying, Yucheng Ge - Peking University, Beijing, China
B. Hong , S. J. Hong , K. S. Lee, S. Park, K. S. Sim - KODEL, Seoul, S. KoreaA. Ball, J-P. Chatelain, I. Crotty, A. Sharma, W. Whitaker - CERN, Geneva, Switzerland
W. Van Doninck - Vrije Universiteit Brussel, Brussels, BelgiumS. Akimenko - IHEP, Protvino, Russia
L. Litov, A. Marinov - University of Sofia, Sofia, BulgariaA. Devlieger – University of Victoria, Victoria, Canada
M. I. Asghar, I. Ahmed, H. Hoorani - National Centre for Physics, Quaid-i-Azam University Campus, Islamabad, Pakistan
Z. Aftab, M. S. Khan, T. Solaija - Pakistan AtomicEnergy Commission, Islamabad, PakistanA. Colaleo, G. Iaselli, F. Loddo, M. Maggi - INFN Bari, Itlay
B. Michal Marcisovsky Samuel Scheonholz Rene Kuo Manohar Jonnalagedda CERN Geneva
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CMS Detector
Endcaps
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FORWARD Resistive Plate Chambers
Final Gas mixture used in all tests95.5 Freon 3.5 Isob 0.3 SF6 + RH 50% = 5000 ppm
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Forward RE Resistive Plate Chambers
• 96 Channels. 3 sectors by 32 strips A ,B, C
• Standard LVDS output
• Slow Control for Threshold and temperature measurements for each F.E.B.
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Testing RE with Cosmics
• Cosmic stand.Top and Bottom layers
scintilators.
Possibility to put 10 chambers inside to test them with cosmics
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Cosmic Stand Trigger
Counters Setup
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Cosmic Stand TriggerElectronics Setup
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Cosmic Stand Data Acquisition
Run Signal
Recording
EnableTrigger
RecordingStop recording
Reading the TDCs
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Main VME Frame
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Data Format From the TDC
64 bit channel information1 time bin is 10ns
1 1 1
128 bit presenting the time information from each TDC
64 bit channel information
64 bit channel information
0 0 0 0… …
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Software and Computing
DAQ 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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Software and ComputingDAQ PC
MXI bus
Pentium 4 1.6 GHz512Mb RAM120GB HDD
Linux PlatformUsing standard drivers from National Instruments for the MXI/PCI controller.
Running Software Offline Analyses Software
Online Tracking engine
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Data From Cosmic TestStrips Profile
Using only 2 scintilators from the top and 2 form the bottom layer
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Data From Cosmic TestStrips Profile
Coincidence with 2 scintilators from top, 2 from bottom and small counter placed on sector B.
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Data From Cosmic Test
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
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Data From Cosmic TestTime Distribution
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Data From Cosmic StandEfficiency and Cluster Size
Scanning for efficiency and Cluster size values at different voltages.
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Online Tracking Software
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Continuously H.V. MonitoringRecording the HV currents every 2 min, and store the data in to the Database.
Including the environment conditions. Temperature and Humidity
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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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Quality Control and Certification for CMS installation
• Checklists are included in all production steps• Quality control and measurements for the gaps• Cosmic Test Data for Noise, Strips Profile, Efficiency, Cluster Size, HV monitoring, Environment conditions.
Certification file for each Endcap RPC Detector
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Summary and Future
Summary•All tests and QC for RE chambers are set up.•100 chambers (RE) are Quality Certificated and ready for Installation in CMS experiment•Production and QC processes are in time.
To do•Optimizing the tracking software