Transcript NoiseAnalysis_Silvia_CMSWeek_15Jun2010x

Silvia Costantini
RPC General Meeting
CMS week
15 June 2010
 Noise
tool used by CAF shifter since
November 2009
 Running smoothly
 Producing:
1.
2.
3.
4.
Lists/numbers/plots of masked strips/to mask/to unmask
Low rate and dead channels
Summary files
Database files
Info linked to the RPC commissioning page (good run list)
Silvia Costantini - RPC General Meeting - CMS Week
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 New
version producing also list of dead
channels
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 Connected
and non-masked channels
 Zero counts
137028: 1178 strips
137170: 1121
Total number of strips: 109752
Average: (1.05 ± 0.03) · 10-2 dead strips
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These numbers include strips in chambers with very low rate, like
137028: 3 chambers
W-1/RB1out/4B
RE+1/2/11
RE+1/3/14
137170: 10 chambers
W-1/RB1out/4B
W-1/RB1out/4F
W-1/RB2out/3B
W-2/RB3/8B
W-2/RB4/10-B
W+2/RB2out/1F
RE-3/3/30
RE-3/3/32
RE+1/2/11
RE+1/3/14
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
Threshold for noisy strips increased from 3 kHz/strip (~10 Hz/cm2)
to 300 kHz/strip
Threshold
3 kHz
30 kHz
300 kHz
581
581
581
2004/1690
1141/850
539/257
137/133
96/92
59/56
41/40
22/21
4/0
965
399
111
To Unmask
14
19
29
Dead Strips
1178
1178
1178
3
3
3
Masked
Noisy (F/W data) Barrel
Noisy (F/W data) E+
Noisy (F/W data) ETo Mask
Low rate rolls
Noise/roll Barrel
*
same
same
1.77
Noise/roll Endcap +
*
same
same
1.37
Noise/roll Endcap *
same
same
1.45
•Average noise/roll, Hz/cm2, WIN data
•Same noise rate in WIN data because same masking configuration
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15 June 2010
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15 June 2010
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 By changing the noise threshold by a factor 100, the
average noise per roll (in WIN data) increases by a
factor 10, from ~0.1-0.2 Hz/cm2 to 1-2 Hz/cm2

Acceptable from the point of view of the noise, IF ok for
the trigger
Silvia Costantini - RPC General Meeting - CMS Week
15 June 2010
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

A description of the tool can be found in the “Online” part of:
CMS IN 2010-002, "Noise Monitoring Tools with RPC Online and
Offline Data”,
http://cms.cern.ch/iCMS/jsp/openfile.jsp?type=IN&year=2010&fil
es=IN2010_002.pdf][IN2010_002.pdf
and in RPC DPG of March 4th:
http://indico.cern.ch/conferenceDisplay.py?confId=87122
Instructions for CAF shifters:
https://twiki.cern.ch/twiki/bin/view/CMS/NoiseToolInstructions
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 Full
counts > 0
 Win counts =0
 connected
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
By clicking, details on: http://cmsrpc402b20.cern.ch/noise/
run131188 To UnMask 1073 To Mask 49 Summary Database
run131350 To UnMask 1484 To Mask 32 Summary Database
run131586 To UnMask 1552 To Mask 14 Summary Database
70 run131188/ToUnmask_run_131188_RB0_far__2010_3_17__2_5.txt
138 run131188/ToUnmask_run_131188_RB0_near__2010_3_17__2_5.txt
62 run131188/ToUnmask_run_131188_RB-1_far__2010_3_17__2_5.txt
……
Summary per tower - Input file
/data/LBMonitorHistos/Histos_run_131350_RB0_far__2010_3_18__12_42_32.root
Total number of masked strips: 255
Total number of masked strips to unmask: 161
Total number of strips to mask: 1
Average rate per roll in WIN data: 4000.56 Hz
Total number of noisy strips in FULL data: 92
Total number of noisy strips in WIN data: 6
Noisy for more than 15' min in WIN data: 1
…..
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Root files with Noise plots
 Text files with summary info: rate, masked strips, strips to mask or
unmask, etc.
Text files linked on:
https://twiki.cern.ch/twiki/bin/view/CMS/RPClistofRunP5cosmic2
010
https://twiki.cern.ch/twiki/bin/view/CMS/RPClistofRunP5collision2
010

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Noise results at the roll level into OMDS DB :
run# = 128762 time = 1266710461
Roll N_masked_strips
N_ToUnmask N_ToMask Rate_Hz Rate_Hz_cm2
W0_RB1out_4B 0 0 0 3811.77 13.2961
W0_RB2out_4B 0 0 0 953.963 2.76404
W0_RB1in_4B 0 0 0 1319.36 4.93089
W0_RB1out_4F 2 0 0 3319.01 10.8098
W0_RB2out_4F 0 0 0 1628.24 4.40497
W0_RB1in_4F 0 0 0 1884.17 6.57494
W0_RB2in_4C 0 0 0 8789.76 40.1742
W0_RB2in_4F 0 1 0 3925.4 16.72
etc. etc.
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