ALFA & its Simulation in the Athena framework status 29.11.2010 Tom Sýkora on behalf of the ALFA soft-sim group November 29-th 2010 ALFA & its Simulation, status, ATLAS Software & Computing Workshop

ALFA detector – positions first “track candidates” observed (K. Korcyl, M. Heller) our ROD and ROS are now part of that ATLAS DAQ the first data file recorded in ATLAS DAQ through the ALFA ROD pot installed November 29-th 2010 ALFA & its Simulation, status, ATLAS Software & Computing Workshop

ALFA packages – release status in the nightly release 16.5.0  together with FPTracker full documentation – on the way November 29-th 2010 ALFA & its Simulation, status, ATLAS Software & Computing Workshop

ALFA_BeamTransport – new schema Daniel Pelikan beam ATLAS cavern ZDC volume ALFA volume ? (AFP) Transport Andrea Dell’Acqua (from his Forward Detectors meeting transparencies): My proposal is to: Set up a Geant4 parameterization scheme for the forward regions Control is given to an external handler as soon as particles enter the forward volume Utilize G4 tracking to the end of the ATLAS cavern FP(N)Track will kick in and transport particles to the front face of the detector where accurate G4 simulation can be restarted November 29-th 2010 ALFA & its Simulation, status, ATLAS Software & Computing Workshop

ALFA_BeamTransport vs MADx – elastic case Daniel Pelikan comparison made before entering the first station (i.e. on ~ 240m) difference σ ~ 12μm November 29-th 2010 ALFA & its Simulation, status, ATLAS Software & Computing Workshop

ALFA – FPTrack vs MADx – diffraction Maciej Trzebinski expected – a good agreement MADx FPTrack November 29-th 2010 ALFA & its Simulation, status, ATLAS Software & Computing Workshop

ALFA_BeamAnalysis – from elastic to single diffraction and further Daniel Pelikan November 29-th 2010 ALFA & its Simulation, status, ATLAS Software & Computing Workshop

Test Beam (TB) data in Athena Sara Diglio & TS bytestream bytestream converter ALFA_RawData filler missing step ALFA_Digit ALFA_Reconstruction byte-stream converter & data class – Athena ready November 29-th 2010 ALFA & its Simulation, status, ATLAS Software & Computing Workshop

ALFA detector – positions – survey Dieter Notz November 29-th 2010 ALFA & its Simulation, status, ATLAS Software & Computing Workshop

ALFA Geo Model – detector alignment & positioning Libor Nozka position of the detectors from survey measurement function for detector movement influence of rotations and shifts – comparison with TB09 & TB10 data November 29-th 2010 ALFA & its Simulation, status, ATLAS Software & Computing Workshop

pot position in station CS Libor Nozka measured two points RPPin1 and RPPin2 – additional constrain need: bend measurement by SYLVAC probes additional step in simulation: internally RPPins positions recalculated to pot‘s main point origin as the pot is rotated to its main point (artificial one) - transformation matrix is set-up accordingly Dieter Notz RPPin2 RPPin1 November 29-th 2010 ALFA & its Simulation, status, ATLAS Software & Computing Workshop

detector position in pot CS Libor Nozka measured two points DetPin1 and DetPin2 w.r.t RPPin1 additional constrain need: tilt measurement points – rotation around z-coord. additional step in simulation: internally detector is placed in pot’s main point so DetPins positions are recalculated to this point origin (artificial one) - transformation matrix is set-up accordingly assuming RPPin1 position by metrology Dieter Notz DetPin2 DetPin1 November 29-th 2010 ALFA & its Simulation, status, ATLAS Software & Computing Workshop

ALFA local recontruction Petr Hamal B7L1 A7L1 z IP x y A7R1 B7R1 2 1 3 4 5 6 7 beam 1 beam 2 November 29-th 2010 ALFA & its Simulation, status, ATLAS Software & Computing Workshop

ALFA & its Simulation, status, ATLAS Software & Computing Workshop summary ALFA_GeoModel is under the continuous development full station survey, pot movement – implemented, testing & validation are ongoing simplest digitization works for MD & OD using the same digitization process still missing – efficiency, cross talks etc. local reconstruction multiple tracks (Matthieu Heller) improved algorithms 2D, 3D…, algorithm comparison global reconstruction, momentum reconstruction – will come soon visualization of ALFA in VP1 – parametrized volumes, new type of volumes in GeoModel following muon example – xml, Andrea Dell’Acqua - an example, will he give a talk?, shall we follow? Geant4 simulation of the forward region (Ladislav Chytka) – support from LHC (Simulation group & Forward detectors) will be needed/useful, py script model – a better understanding needed – documentation? ALFA included in Simulation py scripts – thanks to Andrea Dell’Acqua; more communication with Andy Buckley needed ALFA in nightly release – thanks for the help to Emil Obreshkov and John Chapman notes TB09(10) vs simulation – P. Hamal, L. Nozka, M. Heller, T.S. Transport of Protons with High Energy Loss Through the LHC Magnetic Lattice – M. Trzebinski, J. Chwastowski, T.S. Forward Detectors member(s) in the Simulation group? What is an opinion of the Simulation group? November 29-th 2010 ALFA & its Simulation, status, ATLAS Software & Computing Workshop

ALFA & its Simulation, status, ATLAS Software & Computing Workshop question + numbering of releases + errors emails November 29-th 2010 ALFA & its Simulation, status, ATLAS Software & Computing Workshop

ALFA & its Simulation, status, ATLAS Software & Computing Workshop the end November 29-th 2010 ALFA & its Simulation, status, ATLAS Software & Computing Workshop

ALFA & its Simulation, status, ATLAS Software & Computing Workshop presented (backup) November 29-th 2010 ALFA & its Simulation, status, ATLAS Software & Computing Workshop

full simulation flow geometry fibres, pots, stations detector conditions (run positions, beam, …) metrology GeoModel ATLAS & ALFA elastic scattering diffraction beam conditions generation generator simulation ATLAS particle transport IP  RPs optic files full simulation flow simulation ALFA hit, energy deposit digitization calibration PE spectra el. noise digitization energy  PE test beam data format byte-stream conversion stream monitoring reconstruction online monitoring data quality, gain monitoring stream-byte conversion x-y reconstruction analysis ESD, AOD, DPD offline monitoring alignment (luminosity) analysis steering or job option production of “as real” data; a bit artificial but serves to the consistency check data “as real data” simulation packages November 29-th 2010 ALFA & its Simulation, status, ATLAS Software & Computing Workshop