muon offline status

1Gines Martinez Alice-Offline Week 28 June – 2 Juillet

Muon Offline Status

Ginés MARTINEZ Subatech, Nantes

Alice Offline Week (28 June-2 July 2004)


Outlook

● MonteCarlo and Response Function● Geometry & Alignment● Reconstruction & Event Data Summary● I/O & DataLinks objects● DAQ & RawData & HLT &Mapping &

Calibration● ESD analysis● The other GMS


Response function

● Realistic simulation of the CPC efficiency due to non-gaussian tail (~2%) from SPS data (to do list and nobody here).

● Effect of the magnetic field on the reponse function: pad mutiplicity, spatial shift, ... (nobody here).


Geometry Unique definition of the

MUON geometry. Envelop method from

Ivana Hrivnacova. Global Interface for MUON

Geometry. 3D positionning of

chambers. Aligment with physics (in

the to do list). Geometry in/for

segmentation & reconstruction (to do list)..

Ph.D E.Dumonteil Sep 04


Reconstruction & ESD

● Updating the new clusterizer algorithm (better invariant mass resolution at background level 2)

● Updating the Kalman filter for tracking .● In the to do list and to be done by Alexander

Zinchenko during his 6 month stay @ Subatech end of this year.

● MUON adapted to the new reconstruction and simulation framework. MUON are in ESD, AoD underdevelopment. Splitting the code in sim, common and reconstruction.


I/O and MUON Data ● New I/O ready

– galice.root (smal size) conected to Kinematics#.root, TrackRef#.root, MUON.Hits#.root, MUONS.SDigits.root, MUON.Digits.root, MUON.RecPoints#.root, MUON.Track#.root, AliESD.root

● New Sdigit level for merging.● MUON data structure slightly modified and

managed by the class AliMUONData and AliMUONDataInterface.

● New data link objects to come soon (in the to do list, Artur and Bruce workingon this subject)


RAWDATA & Calibration & Mapping & HLT

● MUON rawdata format to be defined (Alicenote). Generation of rawdata from Digits needed for HLT developments (in progress).

● Mapping framework to be developped. Clever mapping modularity : sectors, PCB, slats, trigger chambers, buses, cathodes, chambers, stations etc ... Important for calibration, channel disable, mapping evolution, etc ... Alice technical note in preparation.

● Starting to think about calibrating one million of channels.


Off-line cartoon

MonteCarlo

Geometry

Response function

PhysicsGenerators

ALICEExperiment

RawData

DigitsSDigits

MergingNoise ...

ReconstructionClusterisation,

Trigger, Tracking

RecPoints Tracks

Sdigits Central HIJING

Real Data

ESDTracks in

ALICE

AOD

PWGAnalysis

ESDAnalysis

VertexCentral Barrel

ZDC ...

HLT

ESD

Storaged MUON Data (I/O)

Bgk data

Kinematics

TrackRef

Alignment

Hits

Calibration

Mapping &Segmentation


Geometry information

Geometry:●Global2Local●Local2Global●IdDetectionElement

MC SimulationDigitalisation

Reconstruction:Clusterisation + tracking

Geometry Config:●14 envelops for chambers●226 envelops for detection elements

Alignment with tracking

GMS


GeometryGeometry Config:●14 envelops for detections planes● 226 envelops for detection elements (sector, slats, trigger chambers)● Absolut Id for each detection element.● Geometry config file will be generated by aliroot (expected position of detection elements), Alignment code (with and without magnetic field, and the Geometry Monitoring System.

Geometry Methods:● GlobalToLocal● LocalToGlobal● New data members in AliMUONHit and AliMUONDigit IdDetectionElement , IdSegment


Detection Planes


St1 & St2


ST345


Conclusions● Geometry configuration and framework

● RawData structure v0 for MUON and generation of from Digits for HLT studies. RawData definition (alice technical note)

● Framework for mapping and segmentation (alice tehcnical note in preparation). To be coded from sep04.

● Dimuon Net workshop in Clermont December 13th-15th, Physics of heavy flavors.

● Next dimuon net workshop in Nantes May-04, devoted to software developments.

● Muon offline manpower is critical

● Linux and linux

muon offline status

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