May 22, 2000Muon ID VR Pushpa Bhat1 Run II Muon Software An Overview Pushpa Bhat Muon Vertical Review May 22, 2000

May 22, 2000 Muon ID VR Pushpa Bhat

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Run II Muon Run II Muon SoftwareSoftware

An OverviewAn Overview

Pushpa Bhat

Muon Vertical Review

May 22, 2000


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Muon Algorithms/ID GroupMuon Algorithms/ID Group Paul Balm (Level3, Hitreco) Pushpa Bhat (Muon Alg. Co-leader, Geometry,muo_explore) Kors Bos (Level3, TIM, d0ve) Laurent Chevalier(Tracking) Frederic Deliot (Tracking, alignment) Oleg Eroshin (FAMUS tracking code) Mike Fortner (Unpack/pack reco, muon_index) Claude Guyot (Tracking) Dave Hedin (Muon ID Co-leader, muo_examine,online) Sharon Hagopian (Graphics) Rick Jesik (Geometry) Sasha Kozelov (Segment reco, track reco) Chun hui Luo (Muon ID, muo_analyze) Onne Peters (Level3, hitreco,segmentreco,trf++,d0ve) Harrison Prosper (Graphics, Geometry, muo_explore) Nemat Rakmatov (Geometry) Christophe Royon (Muon-AlgCo-leader,D0sim,release,debug&test) Marc Virchauex (Tracking) Daria Zieminska (MuonID Co-leader, muonid,muo_analyze, trf++) Andrzej Zieminski(Geometry, Calibration, Alignment)

Ex-members Andrei Mayorov (mureco, muon_index) Vladimir Sirotenko (D0gstar, McToUnp Reco, muon_util, muo_examine) Taka Yasuda (muo_digi, mureco)


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OutlineOutline

Introduction Data Processing in a Nutshell Detailed Data Flow Existing and Planned Packages Software Review Status & Plans


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What does the software do?What does the software do?

Access and unpack Raw Data Sort the data, process and create hit objects Reconstruct segments and tracks

Local Tracking

[Global Tracking (TRF++)] Link reconstructed segments/tracks to tracks

from SMT, CFT and produce muon objects Analyze hits, segments, tracks, muon

particles and MC data; make ntuples Detector and data visualization.

(Muon Algorithms and ID groups run as an integrated entity has helped all parties )


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Data Processing in a NutshellData Processing in a Nutshell

Raw DataRaw Data

Monte Carlo Data

Unpacked Data

Processed Data

Reconstructed Data

Physics Data

Un

pack P

ack

Digitize

Index

Sort, CalibrateAlign,.. Smearing

TrigSim,..

Find Segments,Tracks

Muon ID


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Data ObjectsData Objects

Monte CarloData

SimTkHit

UnpackedData

PDTChannelMDTChannelMSCChannel

ProcessedData

PDTHitMDTHitMSCHit

ReconstructedData

MuoSegmentMuoTrack

PhysicsData

MuonParticle


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MuoTrackReco

MuonParticleMuonParticle RecoReco

MuoTrackMuoTrack

MuoSegmentMuoSegmentRecoReco

MuoSegmentMuoSegmentRecoReco

MuoHitMuoHit

MuoMcToUnpMuoMcToUnp

MuonParticleMuonParticle

GlobalTrackRecoGlobalTrackReco

GlobalTrackGlobalTrack

RawDataRawData

MuoUnp MuoUnp ChunkChunk

MuoHit MuoHit ChunkChunk

MuoSegment MuoSegment ChunkChunk

MuoTrack MuoTrack ChunkChunk

ChunkChunk

RecoReco

RecoReco

RecoReco

(trf++)(trf++)

ChunkChunk

ChunkChunk

SimMUONHit SimMUONHit ChunkChunk


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PackagesPackages


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Muon GeometryMuon Geometry

muon_geometry Defines ideal geometry for the muon system

detectors Provides access to shapes, sizes and

positions of the detectors and their elements, number of wires, wire lengths etc.,

Handles conversions of local to global coordinate systems and vice versa

MuoBaseGeometry, MuoGeomDetector,

MuoGeometer (user interface to geometry tree)

May 22, 2000 Rick Jesik 10

each element is represented by a simple geometric shape and position

when an element is moved, the change of position is automatically propagated to the elements below it in the tree.

muon_geometry packagemuon_geometry package

MuoGeomDetector

WAMUS

East South

PDT

Scint

FAMUS

MDT Scint

Pixel

The muon geometry is represented by a hierarchical tree structure.


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Muon IndexMuon Index muon_index

An indexing/addressing scheme by which every section and every readout cell in the muon system can be uniquely identified.MuoSectionIndex, MuoCellIndex

Each hit will have a muon index Translation to other addressing schemes

used in the muon system are provided (MC, Geometry, Electronics)MuoIndexTrans

Greatly simplifies searching, sorting, and tagging hits, hence improving efficiency and elegance of software.

(performs as a key)


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RECO PackagesRECO Packages

muo_hit muo_data muo_segment

muo_track Specifies data formats for processed and

reconstructed objects.

muo_hitreco Take T0 corrected times, apply calib/alignment,

make time to distance conversions and provide geometrical information of the hits to the user.

muo_segmentreco Find A & BC layer segments using MuoHits.

Allows more than one segment finding algorithm.


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Track RECOTrack RECO muo_trackreco

Builds muon tracks (and track objects) starting with pairs of A & BC segments.

Allows more than one algorithm Currently two algorithms implemented

• Combinatorial Algorithm

Simple matching of A & BC segments in the Toroid, assuming a uniform magnetic field

• Fit Algorithm

Pair of segments are fit into a muon track via track propagation through the non-uniform magnetic field, taking into account multiple scattering and energy loss in the toroid.


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Muon ID PackageMuon ID Package MuonParticleReco is the steering

framework package for muon ID Provides for linking the tracks found in

the muon system to the central tracks (reconstructed in SMT and CFT)

Uses the matched A & BC segments from the muon reconstruction and charged particles from central tracker (Gtracks) The quality of match between the central

track and A-layer segment is stored as MuonQualityInfo.

Working definition of Muon ID

Gtrack + A segment “loose” Gtrack + (A+BC)segments “tight”


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Analysis PackagesAnalysis Packages

muo_analyze

MuoIDAnalyze Reads D0reco output and makes a

HEPtuple and a ROOT ntuple with quantities relevent to muons, based on the contents of appropriate chunks.

MC, Gtracks (pt>1.5GeV/c), hits, segment, tracks, MuonID

muo_explore

An alternate analysis package which currently stores MC and muon local tracking info in an HBOOK ntuple


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Detector and Event DisplayDetector and Event Display

d0ve_muon

D0 Visualization Environment Developed by the NIKHEF group Has been a great tool for debugging

geometry and reconstruction code Now being used for on-line display in the

commissioning runs. Mr Datae

Work underway Beautiful 3D displays

D0Scan Based on Open Inventor


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Software Review Software Review Design & ImplementationDesign & Implementation

Very thorough and very useful review of hit (and segment) reconstruction code(s) by Marc Paterno and Jim Kowalkowski

Design Concerns:

- Template strategy for MuoDataProcessor

- Problem Decomposition in hit processing

- Hit storage in Hit Collection

- EDM and Framework usage

Coding Concerns:

- Poor memory management due to

extensive copy of pointers

- Error reporting


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Software ReviewSoftware ReviewActions TakenActions Taken

Done away with MuoDataProcessor Added new utilities to access unpack data

Chunk selector SelectModules SelectDataChannels

Revised Hit and HitCollection classes Provided new hit access and insert methods Separated different hit types

Written Channel and Hit Adaptors Revised HitReco and HitChunk Fixed other minor technical problems Error Logging


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Status and PlansStatus and Plans

Revisions of hitreco almost done

-sign-off this week Revisions of segment reco and track reco

are underway

-concrete schedule this week New algorithms for segment-finding and

tracking underway : 3 months trf++ Global tracking

-Ramp up after 2 months Muon tracking in Calorimeter

(MuoTrackInCal) Gallas, a few months Improve efficiency, purity, resolution

( Performance studies will cover these topics in detail)


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Major MilestonesMajor Milestones First version of D0gstar Geometry and

Protvino C++ code for FAMUS tracking Fall 1997 Extend to WAMUS, convert to D0standard

Summer 1998 Invented MuoIndex June 1998 D0ve event display available Muon Geometry written, mostly debugged early 1999 Redesign and revise code to decouple EDM and

framework stuff from algorithms. Spring -Fall 1999 MCData Unpdata hit segment track complete.

First real data (cosmic) in Run II format read, processed and displayed Aug .99

A thorough Software Design and Code Review (Paterno and Kowalkowski) Dec. 99

4th major Iteration: Redesign and Revision Jan.00-

present Three Mini Workshops:

April 2000, May 1999, Dec. 1998


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SummarySummary We can process MC and Raw data (in Run II

format) and find tracks in the muon system. The momentum resolution obtained is as

expected. Work needs to be done on improving efficiencies and reducing fake segments.

Design and coding revisions are underway for local tracking software. Global tracking (trf++) work has to be ramped up.

Momentum Resolution

PT vs. PT

Documents

May 22, 2000Muon ID VR Pushpa Bhat1 Run II Muon Software An Overview Pushpa Bhat Muon Vertical Review May 22, 2000