ALFA & its Simulation in the Athena framework status 29.11.2010

1. ALFA & its Simulationin the Athena frameworkstatus 29.11.2010 Tom Sýkora on behalf of the ALFA soft-sim group ALFA & its Simulation, status, ATLAS Software & Computing Workshop

2. 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 ALFA & its Simulation, status, ATLAS Software & Computing Workshop

3. ALFA packages – release status in the nightly release 16.5.0  together with FPTracker full documentation – on the way ALFA & its Simulation, status, ATLAS Software & Computing Workshop

4. Daniel Pelikan ALFA_BeamTransport – new schema beam ALFA volume ZDC volume ATLAS cavern ? (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 ALFA & its Simulation, status, ATLAS Software & Computing Workshop

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

6. ALFA – FPTrack vs MADx – diffraction Maciej Trzebinski expected – a good agreement FPTrack MADx ALFA & its Simulation, status, ATLAS Software & Computing Workshop

7. ALFA_BeamAnalysis – from elastic to single diffraction and further Daniel Pelikan ALFA & its Simulation, status, ATLAS Software & Computing Workshop

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

9. Dieter Notz ALFA detector – positions – survey ALFA & its Simulation, status, ATLAS Software & Computing Workshop

10. 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 ALFA & its Simulation, status, ATLAS Software & Computing Workshop

11. Dieter Notz Libor Nozka pot position in station CS • 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 RPPin2 RPPin1 ALFA & its Simulation, status, ATLAS Software & Computing Workshop

12. Dieter Notz Libor Nozka detector position in pot CS • measured two points DetPin1 and DetPin2w.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 DetPin2 DetPin1 ALFA & its Simulation, status, ATLAS Software & Computing Workshop

13. y B7L1 A7R1 A7L1 B7R1 0 4 2 6 x z IP 1 3 5 7 beam 1 beam 2 Petr Hamal ALFA local recontruction ALFA & its Simulation, status, ATLAS Software & Computing Workshop

14. 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? ALFA & its Simulation, status, ATLAS Software & Computing Workshop

15. question + numbering of releases + errors emails ALFA & its Simulation, status, ATLAS Software & Computing Workshop

16. the end ALFA & its Simulation, status, ATLAS Software & Computing Workshop

17. presented (backup) ALFA & its Simulation, status, ATLAS Software & Computing Workshop

18. simulation detector conditions (run positions, beam, …) geometry fibres, pots, stations GeoModel ATLAS & ALFA metrology generation elastic scattering diffraction beam conditions simulation ATLAS generator particle transport IP  RPs optic files simulation ALFA hit, energy deposit full simulation flow 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 production of “as real” data; a bit artificial but serves to the consistency check steering or job option “as real data” simulation data packages ALFA & its Simulation, status, ATLAS Software & Computing Workshop