muon trigger slice report sergio grancagnolo for the muon trigger group infn-university of lecce...

Muon Trigger Slice Report

Sergio Grancagnolo for the Muon Trigger group

INFN-University of Lecce

CERN Jan 23, 2007

23 Jan 2007 Sergio Grancagnolo 2

Muon Trigger Slice

FasFastt

IsolIsolComCombb

~2 kHz

10 ms <latency> time

TrigMooreTrigMoore

MOOREMOORE

~ 200 Hz

1 s <latency>time

LVL1 LVL1 SimulationSimulation

LVL2 SelectionLVL2 Selection EF SelectionEF Selection2.5 s fixed latency time

MuId SAMuId SA

MuId COMBMuId COMB

B Physics B Physics processorprocessor

DAQDAQ

RPCRPC

MuCTPIMuCTPI

TGCTGC

CTPCTP

LVL2: muon RoIsLVL2: muon RoIs

DAQ: muon candidates

DAQ: muon candidates

DAQDAQ

75 KHzm(6) @ 1033 ~23 KHz


Samples and Releases• CSC production with Athena 12.0.4 and previous• DetDescrVersion = CSC-01-XX-YY

• Reconstruction with Athena 12.0.4

Results presented are not complete, other validations are on going as more data will be available. More details on what will be shown here can also be found in “TAPM” and “T&P week” meetings.


HLT software status in 12.0.4• Sequence for a X signature:

– muFast (LVL2 - Muon Spectrometer only) + muFastHypo (test pT>X )– IDSCAN (LVL2 - Inner Detector only)– muComb (LVL2 - MS &ID) + muCombHypo (pT test)– Muon reconstruction EF ID– TrigMoore (EF)

• MS reconstruction• Extrapolation to IP• Combined fit with ID tracks (reconstructed with newTracking)

– TrigMooreHypo (test pT of combined muons)

• Signatures:– mu6l, mu6, mu20i for HLTCONFIGVERSION=CSC-02– mu0, mu5, mu20i for HLTCONFIGVERSION=CSC-02-900GeV

• Vertical slice configured for trigger menus at 900GeV in addition to standard configuration

– No implementation of the isolation cuts yet


AODs

• Output of trigger objects in AOD to allow rerunning of hypothesis algorithms

• Trigger AOD contents

LVL1 LVL2 EFRecMuonRoI MuonFeature TrigMuonEF

CombinedMuonFeature


LVL1


LVL1 Barrel Muon Trigger Rates

Rates as shown in last T&P week

Muon sources

6 GeV6 GeV threshold

Lumi=1033

5 GeV5 GeV threshold

Lumi=1033

CosmicCosmicthresholdLumi=1033

/K 10800 Hz 21800 Hz 62500 Hz

b 1640 Hz 2220 Hz 3360 Hz

c 970 Hz 1400 Hz 2400 Hz

W 3 Hz 3 Hz 3 Hz

t Negligible Negligible Negligible

Sum 13.5 kHz 25.5 kHz 68.3 kHz

Ri Ld i

dpTpT _ inf

pT _cutoff

(pT ) dpT

Level-1

Efficiency

Inclusive μ cross-section @ LHC

(prompt μ and /K decay)


There is inconsistency between There is inconsistency between TGC cabling database in TGC cabling database in release 12.0.4 and <12.0.4.release 12.0.4 and <12.0.4.

<5% efficiency loss with older release for high pT muon(20GeV)<5% efficiency loss with older release for high pT muon(20GeV) with eta~1.2 and FWD region (small effect for low pT muon)with eta~1.2 and FWD region (small effect for low pT muon)

LVL1 Muon Endcap Simulation: Current LVL1 Muon Endcap Simulation: Current Status Status The latest version : TrigT1TGC-00-01-18-05 (collected in 12.0.4)The latest version : TrigT1TGC-00-01-18-05 (collected in 12.0.4)

[1]Use RDO generated by release 12.0.3x[1]Use RDO generated by release 12.0.3xExecute TrigT1TGC with release 12.0.4Execute TrigT1TGC with release 12.0.4

since coincidence since coincidence window is not optimalwindow is not optimal

[2]Use RDO generated by release <12.0.3[2]Use RDO generated by release <12.0.3MuonRdoToMuonDigit.ApplyPatchForTGC = TrueMuonRdoToMuonDigit.ApplyPatchForTGC = True

Patch will be introducedPatch will be introducedin release 13 so that user canin release 13 so that user canuse RDO (not necessary touse RDO (not necessary tostart from HIT).start from HIT).

To get the latest LVL1 endcap muon trigger performanceTo get the latest LVL1 endcap muon trigger performance

to get correct IDs.to get correct IDs.


Overlap resolution in the MuCTPI

• MuCTPI simulation is able to MuCTPI simulation is able to handle all kinds of overlaps in handle all kinds of overlaps in release 12.0.3.release 12.0.3.

• The plots demonstrate the The plots demonstrate the MuCTPI’s current efficiency to MuCTPI’s current efficiency to resolve fake double-counts resolve fake double-counts between muon sectors. between muon sectors. (Best (Best and worst cases shown.)and worst cases shown.)

• The Barrel-Endcap overlaps The Barrel-Endcap overlaps can be handled pretty well, can be handled pretty well, while the Endcap-Endcap while the Endcap-Endcap overlaps show problems at low overlaps show problems at low ppTT..

before MuCTPIafter MuCTPI


Expected fake double-count rates

Overlap typew/o overlap removal in MuCTPI

with overlap removal in MuCTPI

Barrel-Barrel 169 Hz 81 Hz

Barrel-Endcap 174 Hz 8 Hz

Endcap-Endcap 486 Hz* 315 Hz*

Forward-Forward 43 Hz* 28 Hz*

Total 872 Hz 432 Hz

* Not using strip masks on sector edges.

Rates of fake 6 GeV di-muon triggers at L=1033 cm-1s-2


Other LVL1 on-going work

• Implementation of configurations mechanism for non-standard trigger (cosmics, 5GeV threshold)


LVL2


Fast: endcaps

Barrel

LUT vs r

Endcap

LUT vs

Track finding efficiencyw.r.t. LVL1

~ 99.5% ~ 100%

algo time

on Xeon @ 2.4 GHz~ 1.5 ms < 1 ms

Tail extension

over 210% @ 6 GeV

20% @ 20 GeV

7% @ 6 GeV

8% @ 20 GeV

Resolution5.1% @ 6 GeV

3.7% @ 20 GeV

11% @ 6 GeV

12% @ 20 GeV

fit of the resolution core

1.5 fit

1.5 fit

12.0.4 first release where the algorithm for endcaps

runs in the slice


Offline

Emulation

Inner station has less coverage than medium-outer stations. To check impact on acceptance of a three point measurements vs two point measurements, an offline emulation of the LVL2 Fast has been implemented in the endcaps, using also the inner station measurement. Resolutions function of eta,phi (local). Pt=-6 GeV

Preliminary

Offline studies

Results agree with online code.Loss in acceptance only in some marginal regions.

Including inner station, resolution improves (<10%) in most regions except some eta, phi regions


Without TRT

BARREL:

• Algorithm for the barrel finalized for 12.0.3

• Matching with the ID track done at the external surface of the CALO match , match & z match all

studied with respect the muon pT

– matching efficiency 99.2% with 3 • performance checked with a new

single muon production (11.0.6)• used ~ 1.5x106 events produced

with the spread of the interaction point

• cut on the matching window optimized for muon tracks with pT of 6 GeV

Comb: physics performanceBarrel

Endcap: as of now no back extrapolation is available, hence the association between ID and muon track is driven only by the pT estimated in the two subdetectors


Performances with misaligned data• check of performances while LUTs and alignement of geometry are not optimal

• use of the available sample at 5,10,50,100,300 GeV– misaligned geometry: ATLAS-CSC-01-02-00

• performance of Fast is lowered but Comb almost recover it– no TRT propagation of IDSCAN always used


LVL2 on-going workWork in progress (ready for 13.0.0):• deploying the pattern recognition in the innermost

endcap

• refining pT estimation with the use of innermost station

• back extrapolation for the combined reconstruction in the endcap

• correcting the LVL2 geometry model with the alignment• accessing the MDT configuration database• online access of the MDT calibration constants


Event Filter


EF Performances

pTrec / pT

gen

MOORE tracks with 2 <3

3.65%

3.70%

2.75%

Release 12.0.4

pT = 50 GeV

10k single muon events

MuidSA tracks successfully fitted

MuidCB tracks successfully fitted

No bias observed within statistical errors

Results agree with expected performances from offline algorithms


pT rec / pT gen - SIGMA

• Blue = MOORE• Red = MuidSA• Pink= MuidCB

Expected trend of pT resolution vs eta.

Increasing at critical barrel-endcap transition, as observed in offline reconstruction.

Resolutions

Release 12.0.3

Release 12.0.4


Algorithm EfficienciespT=100 GeV

Efficiency drop in correspondance of the feets


EF plans for 13.0.0

• ID seeded version• Package split in order to be more friendly to new

developers• Topological algorithms• Migration to new EDM

– Implementation of Alg tools in order to share code with offline

– Will get collections of unseeded (for wrapped mode) or of seeded (for online use) PrepRawData


Conclusions

• Muon slice is performing well• All levels are ready, isolation requirement using

calorimeter, still to be integrated• Next improvements

– Configurables• drive with configurables the configuration of the full set of

Tools/Services used by algorithms, where possible– Migration to "New Steering"

• FEX algorithm migrated for LVL2 and EF• Hypothesis algorithm coding on going for EF, done for LVL2• need extensive testing

– New performances need to be evaluated as new data will be available, compatibly with csc notes timescale

muon trigger slice report sergio grancagnolo for the muon trigger group infn-university of lecce...

Documents

muon roisdaq

muon sectors

muon triggers

trigger menus

muon candidatesdaq75

nonstandard trigger

endcapendcap overlaps

barrelendcap overlaps