21
T. Orimoto, ECAL in CRUZET 1 ECAL in CRUZET CRUZET Data Analysis Jamboree 30 May 2008 Toyoko Orimoto California Institute of Technology On behalf of the ECAL prompt feedback group

ECAL in CRUZET

Embed Size (px)

DESCRIPTION

ECAL in CRUZET. CRUZET Data Analysis Jamboree 30 May 2008 Toyoko Orimoto California Institute of Technology On behalf of the ECAL prompt feedback group. ECAL Prompt Feedback Group. T. Orimoto, A. Bornheim (Caltech) K. Kaadze (KSU) S. Chang (Uni. Kyungpook) J. Fay (IPNL Lyon) - PowerPoint PPT Presentation

Citation preview

Page 1: ECAL in CRUZET

T. Orimoto, ECAL in CRUZET

1

ECAL in CRUZET

CRUZET Data Analysis Jamboree30 May 2008

Toyoko OrimotoCalifornia Institute of Technology

On behalf of the ECAL prompt feedback group

Page 2: ECAL in CRUZET

T. Orimoto, ECAL in CRUZET

2

ECAL Prompt Feedback Group

• T. Orimoto, A. Bornheim (Caltech)• K. Kaadze (KSU)• S. Chang (Uni. Kyungpook)• J. Fay (IPNL Lyon)• F. DeGuio, P. Govoni (Uni Milano/INFN)• S. Cooper, J. Haupt, J. Zhang, V Rekovic (Uni. Minnesota)• P. Paganini (LLR)• A. Palma, C. Doglioni (Uni. Rome/INFN)• N. Cartiglia, A. Gozzelino, S. Oggero (Uni Torino/INFN)

• And others have joined since CRUZET!

Page 3: ECAL in CRUZET

T. Orimoto, ECAL in CRUZET

3

ECAL in CRUZET

• Since CRUZET, have processed all good ECAL cosmics events.. 24M!

• ECAL barrel fully readout for most of the time, 36/36 supermodules– Aside from some LV issues, ECAL readout has been clean

through CRUZET

• Successful “prompt” analysis– By Friday of CRUZET, had analyzed ~14M events.

• Now continuing with further analysis of CRUZET data:– Cosmics analysis, now starting to look at track association with muon system

– Analysis of high energy events

– Study of problematic channels

– Laser data analysis

– Cosmic intercalibration with CRUZET statistics

Page 4: ECAL in CRUZET

T. Orimoto, ECAL in CRUZET

4

Cosmics in ECAL: Event Displays

• Run 43566, Event 37324• Triggered by DT• High Energy Event: 288

GeV in one cluster of 25 crystals

288 GeV Cluster, 25 xtals

DT hits

Reco Track

Page 5: ECAL in CRUZET

T. Orimoto, ECAL in CRUZET

5

Cosmics in ECAL: Event Displays

• Run 43588, Event 121626• Triggered by ECAL & DT

• More event displays:http://test-cruzetvisualization.web.cern.ch/test-CRUZETVisualization/

16 GeV Cluster17 xtals

HCAL (with E cut of 1 GeV)

1 GeV Cluster

Page 6: ECAL in CRUZET

T. Orimoto, ECAL in CRUZET

6

• Cosmic selection, based on clusters:• 1 xtal with >135 MeV or

two neighboring xtals with > 45 MeV each

• Then take the 5x5 of the crystals and build a Basic Cluster.

• Efficiency of cosmic cluster selection is ~14%

• Cluster energy spectra (All plots are for 24M events analyzed, unless otherwise specified)

Cosmics selection in ECAL

Energy to 200 GeV

Page 7: ECAL in CRUZET

T. Orimoto, ECAL in CRUZET

7

ECAL Cosmic Occupancy

Looking at the promptly-produced offline processing, HV issue was noticed and subsequently fixed.. S. Cooper,

J. Haupt, T. Orimoto

HV prob

Masked TT (Maxim

um forced to 2x10

2 )

TOP BOTTOM

EB

+E

B-

Page 8: ECAL in CRUZET

T. Orimoto, ECAL in CRUZET

8

ECAL Cosmic Occupancy with L1

• Occupancy for events which pass “cosmic” selection, also selecting on L1 bits.

• Inclusive Trigger (no requirement on other subsystem trigger)

ECAL TriggerECAL Trigger

DT TriggerDT Trigger RPC TriggerRPC Trigger

Page 9: ECAL in CRUZET

T. Orimoto, ECAL in CRUZET

9

Track Association

Coming soon.

S. Cooper, F. DeGuio, C. Doglioni, T. Orimoto

Page 10: ECAL in CRUZET

T. Orimoto, ECAL in CRUZET

10

High Energy Events• ~5k clusters w/ E>10 GeV

(~100 clusters w/ E>200GeV)• Possible sources:

• Showering muons• Muon catastrophic

Bremsstrahlung• Deep inelastic scattering

• Created “high energy” skim to collect events which contain at least one cluster with E>10 GeV

• Show here: • Occupancy of high E clusters• Num of xtals in high E clusters

(Basic Clusters, so max is 25. Average is 16 xtals.)

• Further analysis ongoingC. Doglioni, A. Gozzelino S. Oggero, T. Orimoto

Page 11: ECAL in CRUZET

T. Orimoto, ECAL in CRUZET

11

ECAL Timing

Mean timing (pulse peak position - 6) in modules in (iphi,ieta), for events which pass cosmic selection (TT binning)

S. Cooper, J. Haupt, T. Orimoto

Top earlierTop earlier

Bottom laterBottom later

Page 12: ECAL in CRUZET

T. Orimoto, ECAL in CRUZET

12

ECAL Timing• ECAL signal: 10 samples, 3 pedestal, ideally peak is at 6th sample

• Timing = pulse peak position - 6

• Divided by trigger type: “Exclusive” trigger (no trigger from other systems)

S. Cooper, J. Haupt, T. Orimoto

ECAL ECAL triggeredtriggeredMean 1.5RMS 1.0

DTDTTriggeredTriggeredMean 0.4RMS 0.7

RPCRPCtriggered triggered Mean 0.9RMS 0.5

ALL eventsALL eventsMean 0.54RMS 0.70

(Timing throughout CRUZET,

close to optimal)

Confirm HCAL:

ECAL is 2 clocks

off

Page 13: ECAL in CRUZET

T. Orimoto, ECAL in CRUZET

13

ECAL Timing

• Run 43637: at end of CRUZET, with GT latency set to correct for ECAL timing… Moved 2 bunch crossings so ECAL is aligned

Timing for earlier run 43431: Timing for run 43637, after correction:

Mean = 1.7RMS = 0.6

Mean = 0.4RMS = 0.6

ECAL timing looks much better now.

S. Cooper

Page 14: ECAL in CRUZET

T. Orimoto, ECAL in CRUZET

14

ECAL Laser Data in Gap Sequence

• First successful laser data in gap event sequence

• Run 43625: 34 SM• Timing from laser data:

– 50ns overall scale. <1ns variance inside TT, ~15ns variance between SMs

– Intra SM spread -- can be corrected

– Pattern of 2 SMs.. (still to be understood)

J. Haupt

Time of pulse peak vs FED.TT

Laser timing by xtal

Red: corrected for differences in laser cable lengths

Page 15: ECAL in CRUZET

T. Orimoto, ECAL in CRUZET

15

ECAL Laser Data: Timing

• Correct intra-SM differences in timing in cosmic data, using laser data– Compute average timing for each SM & compute difference between each TT in

SM and the average… then correct cosmic data with these correction factors

J. Haupt

Before laser

correction

After laser

correction

Page 16: ECAL in CRUZET

T. Orimoto, ECAL in CRUZET

16

ECAL Problematic Channels

• Problematic channels list produced using information about known hardware problems, as well as “hot” channels seen during and since GRUMM with cosmic and pedestal data (channel status map now in DB)

• Dedicated analyses deployed to study “problematic” channels not previously seen

C. Doglioni,A. Palma

Reconstructed amplitudes (weights method) w/ and w/o masked channels:

Clearly noisy areas, still to be fully understood…

Page 17: ECAL in CRUZET

T. Orimoto, ECAL in CRUZET

17

ECAL Trigger Primitives

• Study was done on the trigger occupancy from ECAL trigger primitives (P. Paganini). This led to a list of trigger towers to be masked. With this in place, a top-bottom coincidence ECAL trigger was deployed (1Hz when threshold set to 250 MeV).

• Something from Pascal?

Page 18: ECAL in CRUZET

T. Orimoto, ECAL in CRUZET

18

Conclusions

• Cosmic analysis. All data available as of last night processed. Already closely investigating trigger and instrumental patterns.

• High energy events: several k of > 10GeV clusters.. Study ongoing.• ECAL trigger: top-bottom coincidence deployed• ECAL timing: Shifted 2 BX, now looks OK. Studies with laser timing.• Laser: Successful laser data taking in gap event sequence• Cosmic Intercalibration with CRUZET data: Analysis started…

• More plots, linked from our PFG wiki pages: http://cern.ch/cmsccecal

• Getting ready for CRUZET-II: blah blah blah

Grateful to ECAL P5-commissioning and Grateful to ECAL P5-commissioning and DAQ teams for helpful discussions!DAQ teams for helpful discussions!

Page 19: ECAL in CRUZET

T. Orimoto, ECAL in CRUZET

19

Zero Suppression of ECAL

After considering feedback from GRUMM, zero-suppression threshold of 7 (1.75 ADC counts) applied throughout CRUZET

A. PalmaAmplitudes reco’d with weights method

Fraction of digis with amp >= emulated 0-supp threshold

ZS=7 (1.75 ADC counts)

Page 20: ECAL in CRUZET

T. Orimoto, ECAL in CRUZET

20

ECAL Triggering history

run 43307: only ECAL triggers with EB-, single EM trigger TT theshold=20

run 43308: only ECAL triggers with EB+, single EM trigger TT theshold=20

after run 43308: muons trigger only

run 43431 and later: muon triggers+ECAL triggers with top-bottom configuration. TT threshold=25

run 43488 and later: muon triggers+ECAL triggers with top-bottom configuration. TT theshold=20

run 43545: only ECAL triggers with top-bottom configuration. TT threshold=20

run 43547: HCAL provides the trigger with a top-bottom configuration

run 43548: only ECAL triggers with top-bottom configuration. TT threshold=25

later runs: same as 43548+muon triggers

Page 21: ECAL in CRUZET

T. Orimoto, ECAL in CRUZET

21

RPC near side, YB0 & YB1

DT = all wheels; 3.or.4.or.5.or.9.or.10.or.11; at least 2 chambersECAL = EB+.or.EB-; (5.or.6)&(14.or.15)RPC = YB0.or.YB1; 10.or.11.or.12.or.1.or.2.or.3; at least 3 rolls CSC =ME1+,4+; almost all chambers

Triggering Scheme