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