1. Muon DPG 2012 Camilo Carrillo (INFN Napoli) Tim Cox (UC Davis)
Mario Pelliccioni (INFN Torino)
for Muon IB, CMS Week, CERN, 28-Feb-2012

2. Outline
Common issues
DPG Status
CSC DT
RPC
Conclusions

3. Common Issues
We went through CMS DQM & AlCaDB reviews in January, without trouble. - DQM review encompassed Data Certification too. - AlCaDB review encompassed general Database usage & ‘Calibration’ conditions data for offline (DT/CSC), RPCMonitor Stream (RPC).
Muon DPG Paper ongoing, meeting with ARC this week.
2012 MWGR, first results good sync among our Muon Detectors.
A lot of software changes were made, (SLC5, CMSSW_5_X_X). From DPG side everything is fine.
DT vs RPC
DT vs CSC
CSC vs RPC

4. CSC DPG 2012 STATUS
Updating Bad Chambers (used in Simulation) and Bad Channels (used in Rechit-building) conditions data files, ready for 2012 Sim & Reco.
New DQM plot to monitor L1A mismatches within CSC electronics, for diagnosis of the r/o efficiency problem uncovered at high L1A rates in CSC readout experts have made great progress towards curing this problem.
Starting to investigate CSC data rates (via LCT multiplicities) as function of trigger.
Measured LCT and Segment efficiencies in 2011 data using ZMM Tag & Probe, confirms inefficiency in CSC r/o for L1A rates > ~70kHz, but not in LCTs.
Release Validation continues smoothly as CMSSW is developed for 2012.
Reviewed Data Certification workflows and integration with CSC DQM Shifts. - Intend to use Run Registry 3 to feed CSC expert shifter comments into Data Certification.
MWGR runs show CSC system and entire online to offline chain is working fine after all hardware upgrades and CMSSW version upgrades over winter shutdown. - Online switched to SLC5 - Offline switched to CMSSW_5_X - CSC rechit container members simplified. - Gas-gain corrections applied in order to supply an ‘energy loss’ in rechit. - Anode zero suppression operational online (firmware) & offline (Raw data Unpacker).

5. CSC rechit global positions
Run B=0 CSC+RPC Cosmics Trigger [MWGR 15 Feb 2012] in Offline DQM
Standard asymmetry -z > +z for cosmics due to shaft, & top > bottom

6. CSC rechit global positions
Run B=0 CSC+DT+RPC bottom-only Cosmics Trigger [MWGR 23/24 Feb 2012] in Offline DQM
Standard asymmetry -z > +z for cosmics, due to shaft & bottom > top due to trigger
- All looks good and confirms CSC system is operating ~normally after shutdown.

7. CSC local reco #Rechits/Event #Rechits/Event log scale 6 = 1 CSC
Run B=0 Cosmics [MWGR 15 Feb 2012] Blue points are Run CRAFT Cosmics [Feb 2011]
#Rechits/Event
#Rechits/Event
log scale
6 = 1 CSC
12 = 2 CSCs
18 = 3 CSCs
Segment Global φ
Segment Global θ
Segment Time
log scale
Segment Time
2 ns bins
-200ns
+200ns
-200ns
+200ns

8. DT DPG 2011 Status
Studies on DT performance as a function of luminosity
show our trigger/local reco efficiency is unaffected by different beam conditions
For the 2012 data taking, we added in our DQM the
monitoring of our calibration constants (time
pedestals and drift velocity). This will allow to
reduce latency between changes in conditions and
a new calibration.
Added a delta-rays rejection algorithm into our local
reconstruction code. Delta-rays always arrive
earlier to the wire → a χ2 cut improves the temporal
and spacial resolution
We also checked with the last part of 2011 data that
our MC conditions still reproduce well our resolution
in data
DTLT efficiency
Local reconstruction efficiency
Background rates (single hit within a layer)
Increased linearly with luminosity in 2011.
Of course, still much below our TDR studies
MB4

9. DT DPG Status 2012 cosmics
Using MWGR2 cosmics, detector seems in good shape
Number of hits per
segment for horizontal
layers similar to
collision muons
Local reconstruction efficiency
Average BX expected for
bottom triggering

10. RPC DPG 2012 Status
RPCMonitor Dedicated HLT Stream for RPCDPG Studies.
HV Scan 2011 Successfull all the Working Point for every Chamber are known.
Automatic High Voltage correction due to pressure changes in place and working (PVSS).
The correlation with pressure is gone
Runs without automatic pressure correction,
Runs with automatic pressure correction.
With Pressure correction
Without Pressure correction
April 2011
October 2011

11. RPC Monitor Stream Detailed efficiency Maps
Efficiency resolution 1cm^2.
Tool to establish correlations between efficiency and gas leaks, and other problems.
Chambers off are represented in white.
Blue and yellow lines are lower efficiency regions due to masked/dead strips.
The joints in between double gaps can be seen in yellow as well.
Little squares in the corners are just ROOT legends, not an inefficient region.

12. RPC DPG other detector Parameters
Apart from the Event (Reco RPC Hits),
other parameters are monitored Run By Run
by shifters at CMS Center. Like Temperature, Current and Background.
DQM, WBM, Noise tool, and Efficiency offline.
For 2012
HV Scan 2012 to be performed with early LHC data. RPCMonitor Stream is being tuned.
Upgrade for the efficiency tool is ongoing (segment extrapolation with associated STA muons)
Intrinsic Noise Rate
Background
Noise Tool
Current
Temperature
WBM
WBM

13. Relative Efficiency for muon identification with and without rpc hits
1313
Ratio vs. Eta
Ratio vs. pT
CMS Preliminary
CMS Preliminary
ε(globalMuonNoRPC)
ε(globalMuonRPC)
R =
Muon RPC STA object under construction.

14. Conclusions MWGR everything is operating smoothly
In 2011 Muon DPG collaboration increased (Muon DPG Paper, Muon DPG meetings on demand)
Each group has specific holes in manpower for core tasks
DT Calibration
CSC Prompt Feedback
We lack commitment for several day to day tasks so that we can count on timely support when necessary.