HCAL DPG Status

1. HCAL DPG Status Olga Kodolova for the HCAL DPG October 20, 2011

2. Updating Conditions For the reprocessing with CMSSW44 Compensate for QPLL unlock by increasing number of TS from 5 to 4 (HcalRecoParams) For the 2011 HCAL Calibration Update Data derived response corrections will be applied on top of the hardware corrections Calibration data has to be reprocessed with final offline tags forHcalGains and HcalRecoParams Phi-symmetry updated HF energy scale was done from Z->ee Isolated track calibration done – the change relative to 2010 is within statistical errors. We decided to keep 2010 calibration and redo isotracks with full 2011 statistics and PU contamination corrections. Data reduction in HBHE (~20%): change from 5 to 3 ZS pairs . Jim gave report at PVT. Validation from Egama/Muon/JetMET POGs have been Performed. Substantial efforts were needed to overcome approval for HW change.

3. Calibration Schedule Need hardware conditions with IOVs for the data range that will be used for the calibration HcalGain HcalRecoParams Sept 30 Updated phi-symmetry Oct 14 Updated isolated track Oct 21 Validation and testing Oct 24 2011 calibration ready for updating corrections to high level objects Tag 2011A update has been provided for Validation. The data samples are re-reconstructed for PF/JetMET validation. Preliminary validation was already performed with test Tags provided at the beginning of Sept. Do not expect issues now, although…

4. Next Calibration: We plan the update that includes full 2011 data (2011B). Target is Reprocessing with CMSSW5X. Tag will include HF gain corrections, phisym and isotracks with PU Contamination over full 2011 data. HF/Lumi WG Nural agreed to lead this effort. Dan will give presentation at the next HCAL DPG. The study of PMTs gain loss origin and value starts to be urgent: need to put together all available measurements.

5. 25ns/High PU WG The 25ns/High PU WG has been successful. We have identified issues thatneed to be addressed and we have developed a strategy to address them. We return to bi-weekly schedule keeping the possibility of extra meeting in the alternate week. Next meeting will be focused on Noise filters, status of updates to reduce Data volume. 1) Data volumeThis is well defined...Project data volume for 2012 and make sure we apply all necessary improvementsa) Reduce the number of TS being readoutb) Reduce ZS search window    We have done the work to get this approved onlinec) Increase number of FEDs    plan work and identify people    test new cabling connections, verify correct mapping    update softwared) New data format    Specify proposal and requirements    Update software    Allows us to reading more TSs

6. 25 ns/High PU WG 2) Energy reconstructionThis is well definedWe have settled on the proposal for 2012 running- 2TS for HBHE, 1TS for HF, 4TS for HOWill require updating the pulse description in the MCWill need to apply special treatment to problematic channels Need to study the motivation: MET improvments,Higgs, look for 25 ns run 3) Noise FiltersNeed to get an update...Noise WG should provide the recommendations for the start of 2012Indicate efficiencies of filters for the two scenarios (25ns/50ns high PU)What adjustments are needed for the current filtersMonitoring the performance as LHC conditions changeIndicate what does the residual noise look likeTreatment of problematic channels

7. 25 ns/High PU 4) Trigger and online configurationThis is well defined...We have decided to keep the HF phase as is (50/50-7ns)For 50ns running we want to keep the BX-1 vetoFor 25ns running we will need to remove HF from the L1 trigger since we cannotkeep the BX-1 vetoProvide additional studies/test indicating the level of prefiringSummarize studiesWe investigated PU subtraction at L1 and decided not to include it5) Updating running conditionsMake sure we have the online and offline conditions updated with a consistentset of conditions. For example make sure current calibration and hardware conditionsare appropriate for new energy reco. Update Noise filters...

8. 25 ns/High PU WG 6) Monitoring and updating online conditionsWill need to monitor HPD/PMT gain drift and apply gain corrections online.Procedure to do this will need to be defined and updated conditions propagated to L1.May increase HF HV to compensate for gain drop7) Replace/Adjust hardwareIt does not look like we will have an access and we will not be able to replacethe problematic hardware. Will need to accommodate problems in software, includingOnline conditions, calibration, noise filters, energy reconstruction, monitoring...- HPD with lowered BV- HPD with clock problem8) DQM and Data CertificationNo major issuesWill need to review and update procedures once we start getting the data

9. 25 ns/ High PU WG 9) Technical triggersNo major issuesMay need to increase thresholds or tune prescales10) CalibrationWe still have issues that we need to work throughWill need to monitor and update the isolated track trigger to keep therates under control and increase purity of the samplesCheck calibration method in the presence of high pileupCheck calibration method with new energy reconstruction11) Test beam and special runsUse testbeam to investigate punch throughLook at special runs to check performance of L1 triggerCheck prefiring rateCheck performance of noise filters

10. Backup

11. 25ns/High PU WG Energy reconstruction Startup scenario for 2012 for 25ns and 50ns HF 1TS HBHE 2TS Measure pulse from data and update description in MC Introduce changes in CMSSW5x QPLL problem will prevent us from using 2TS Fallback option may be to keep using 4TS and 5TS Investigating best option… Hope that the problematic modules can be replaced