1. GGM Integration
Stefano Colafranceschi for the Frascati group
in collaboration with Giovanni Polese and Filip Thyssen
September 21, 2009
The gas monitoring system is based on small RPC detectors in a cosmic ray telescope whose working point (gain and efficiency) is continuously monitored online. The gas monitoring system is designed to provide determination of shifts in working point conditions.
The GGM gaps are located in the SGX5 gas room, the charge response to cosmic rays is monitored for three subsystems fluxed with fresh, before purifiers, after purifiers gas mixes.
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S.Colafranceschi - GGM INTEGRATION 1

2. S.Colafranceschi - GGM INTEGRATION
GGM Layout
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S.Colafranceschi - GGM INTEGRATION 2

3. S.Colafranceschi - GGM INTEGRATION
gas room
HUMIDIFIER
P,T,RH
SENSORS
VME
DAQ
RPC
GAPS
RPC
GAPS
IN CR TELESCOPE
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S.Colafranceschi - GGM INTEGRATION 3 3

4. VERY COMPLEX GGM INTEGRATION LAYOUT
Integration of GGM in DCS is complex
New problems such as the readout of CAEN VME ADCs for gaps charges needed to be solved for integration into xDAQ
New drivers written by IT department for PICO T/p/RH sensors
General plan of the DCS system:
3 computers in the .cms network take care of reading data variables from
VME crate
Environmental sensors
CAEN power supply
cms-rpc-dcs-07
XDAQ
dst file
ROOT file (adc spectrum)
metadata
OPC SERVER
LABVIEW Picotech sensor
cms-rpc-dcs-09
DCS PVSS
HV, I monitoring
Environment
Daq variables
cms-rpc-dcs-08
XDAQ PC
PVSS PC
ENVIRONMENTAL PC
CMS RPC Shifter
OPEN PROBLEM!!
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S.Colafranceschi - GGM INTEGRATION 4

5. Gas Gain Monitoring – Integration
INTERNET
cms network
cms-rpc-dcs-07
cms-rpc-dcs-08
cms-rpc-dcs-09
XDAQ
DCS PVSS
OPC SERVER
dst file
ROOT file (adc spectrum)
metadata
HV, I monitoring
Environment
Daq variables
LABVIEW Picotech sensor
cronjob and preparation
Open Problem!!
DROPBOX popcondev
ORCON DB
OMDS DB
DB offline for conditioning and calibration
streaming
ORCOFF DB
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S.Colafranceschi - GGM INTEGRATION 5

6. S.Colafranceschi - GGM INTEGRATION
GGM status
DCS Control Panels to be fully integrated in the DCS RPC
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S.Colafranceschi - GGM INTEGRATION 6 6

7. WHAT IS AVAILABLE TODAY WITH GGM IN THE PRIVATE NETWORK
All Packages have been already tested in the public network
DAQ system (XDAQ package)
HV, I monitoring (PVSS package)
P/T/TH gas sensors (LabView package)
Data transfer tested in the public network
From/to PVSS DCS to pico sensors through OPC
From/to PVSS DCS to trial DB (many problems found!)
From/to XDAQ to VME controller
Data transfer that cannot be tested (easily) in the public network
FROM XDAQ to PVSS (PSX package), expecting help provided by experts
Data transfer that cannot be tested at all in the public network
From/to PVSS DCS to official CMS DB OMDS ), expecting help provided by experts
Once done last two steps;To test the beta version from the cms private network:
login to lxplus.cern.ch, login to cmsusrX
rdesktop cms-rpc-dcs08 (DCS computer with the daq, HV, I monitoring, environment monitoring)
done
done
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S.Colafranceschi - GGM INTEGRATION 7

8. Open problem PSX server
cms-rpc-dcs-07
cms-rpc-dcs-08
XDAQ
DCS PVSS
“PSX server is supposed to send GGM daq value (streamer, avalanche monitoring and efficiency) from our XDAQ application to PVSS through a SOAP protocol”
dst file
ROOT file (adc spectrum)
metadata
HV, I monitoring
Environment
Daq variables
RPC PSX
This server is needed to export the variables from the XDAQ application, linux based, to DCS PVSS datapoints
Outside cms network: any PSX server ready-to-use available, we have tried to setup it but encountered many problems, and at the moment it doesn’t’ work.
Installed PVSS 3.7
Installed XDAQ WORKSUITE and PSX compiled package
Communication problem with the PSX server, during the setup something was wrong; the expert L.Orsini suggested to use the central one.
2. Inside cms network the RPC PSX server is running, but encountered problems using it, it seems we have to be fully integrated to have access to this server. We expect from Gomez-Reino Garrido  (the expert) the possibility to use this server.
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S.Colafranceschi - GGM INTEGRATION 8

9. S.Colafranceschi - GGM INTEGRATION
WHAT IS LEFT TO DO…
Open problem: Developing/Debugging integration protocols (PSX) in the .cms network, what we have done:
Installed PVSS/XDAQ WORKSUITE and PSX to setup a private PSX server
Tried to use the central PSX server but no communication
Open problem discussed with F. Thyssen, G. Polese and R. Gomez-Reino Garrido, we expect to use “easily” the central PSX server as soon as possible
From/to DCS PVSS to official CMS database OMDS, thanks to G. Polese
PVSS panel ready to be integrated in the main RPC shifter panel
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S.Colafranceschi - GGM INTEGRATION 9

10. Stefano Bianco - CMS Frascati - Riunione referee
GGM References
M.Abbrescia et al., Gas analysis and monitoring systems for the RPC detector of CMS at LHC, LNF P, LNF P, Jan pp. 
Presented by S.Bianco at 2006 IEEE Nuclear Science Symposium (NSS), Medical Imaging Conference (MIC) and 15th International Room Temperature Semiconductor Detector Workshop, San Diego, California, 29 Oct - 4 Nov 
e-Print: physics/
L.BENUSSI et al. for the CMS RPC Collab., Sensitivity and environmental response of the CMS RPC gas gain monitoring system. FRASCATI-PREPRINT-LNF (P), Dec pp, e-Print: arXiv: [physics.ins-det], presented by L.Benussi at RPC07, Mumbai (India) 2008, Nucl. Instr. and Methods A 602 (2009), pp
L.BENUSSI et al. for the CMS RPC Collab., The CMS RPC gas gain monitoring system: an overview and preliminary results. FRASCATI-PREPRINT-LNF-08-29(P), Dec pp. e-Print: arXiv: [physics.ins-det], presented by S.Colafranceschi at IEEE08, Dresden (Germany) 2008, published in JINST 4:P08006,2009.
Stefano Bianco - CMS Frascati - Riunione referee

11. S.Colafranceschi - GGM INTEGRATION
SPARE
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S.Colafranceschi - GGM INTEGRATION

12. Gas Gain Monitoring Performance
Coherent effects cancel out due to system redundancy. The two-gap ratio cancels out
Long-term environmental effects at the
+-2% level
+-2%rms
Gas Gain Monitoring Performance
Avalanche Streamer
Anode charge in avalanche-streamer
transition region monitors shifts in
working point. Large dependence
on gas mix components
0.3% SF6
0% SF6
Gaussian Fit
s = 1.7%
Stefano Bianco - CMS Frascati - Riunione referee