1 / 8

Analysis of Random Trigger Data 2010 for HEC

Namig Javadov JINR (Dubna ). Analysis of Random Trigger Data 2010 for HEC ( data10_7TeV.00155569.physics_RNDM.recon.ESD.f260 ). Method was already presented at the ECAL meeting.

armen
Télécharger la présentation

Analysis of Random Trigger Data 2010 for HEC

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Namig Javadov JINR (Dubna) Analysis of Random Trigger Data 2010 for HEC (data10_7TeV.00155569.physics_RNDM.recon.ESD.f260)

  2. Method was already presented at the ECAL meeting. (http://indico.cern.ch/conferenceDisplay.py?confId=68351, http://indico.cern.ch/conferenceDisplay.py?confId=72237) The idea was to have a look at the “good” cells by checking how much the energy distribution in the particular cell is different from the average value in the corresponding η-ring in which the cells are identical . • Dataset used in the analysis: • data10_7TeV.00155569.physics_RNDM.recon.ESD.f260…. • Athena 15.6.9 • Total 450 files • Total number of events: ~256652 • - The energy for every HEC cell was accumulated in the histogram • All histograms, each containing ~25 lb, were fitted by the Gaussian • The Mean and Sigma values for each cell were used in the analysis

  3. Mean and Sigma values for each “good” cells (i.e. not in the unhappychannels” list from 08.05.10 + 4 new) for the same η-value (ring–region), were put in histograms and then fitted. The fit results were used for selection of the “problematic” channels. One ring One cell 25 lb Mm_ring Mσ_ring Mean One ring One cell Total events Ct_M Ct_σ NM_ring Nσ_ring Noise Example the cell and the ring-region with no problems.

  4. Cell pedestal shift in the run relative to averaged over η-region( ±nϬ_ring ) Cell pedestal shift vs region pedestal average |C_mean | > M_ring±3MϬ_ring The shown is pedestal drift with lb.

  5. Ratio of cell noise to the ring average Ct_Ϭ /NM_ring The ratio (Ct_Ϭ /NM_ring) is more than 2.0 9 such cells were spotted in December’09 (RNDM run 140571), 7 of them are shown in red and two are now in the unhappychannel list (LowNoiseHG).

  6. “Low noise” cells Ct_<NM_ring-n*Nσ_ring

  7. RNDM run 140571 (December’09) “Low noise” cells Ct_<NM_ring-n*Nσ_ring Since the December’09 3 cells are “unhappy” and 2 remain stable (are in previous Table).

  8. Conclusion Some “problematic” channels have been observed and tabulated in run 00155569.physics_RNDM . The results are compared with the December’09 run 00140571.physics_RNDM

More Related