Muon Detector Description status and plans

1. Muon Detector Descriptionstatus and plans summary of contributions from Laurent Chevalier, Andrea Dell’Acqua, Jean Francois Laporte, Stefania Spagnolo, Dennis Wright Muon Week - CERN

2. Outline • Geometry tags • from Atlas-CSC-01-02-00 (Bulk of CSC production) to Atlas-Geo-00-00-00 (data taking layout) • XML to GeoModel translation for Inert Materials • Performance issues: • Robustness: clash cleanup • Memory allocation • FDR2: alignment constants loaded run-time • Atlas-CSC-02-00-00 and Atlas-CSC-02-01-00 the FDR 2 tags • Summary of Muon DD functionality in recent and future releases Muon Week - CERN

3. (*) tables(*) ascii file tables(**) XML amdb blob Muonboy via Amdc Content/use of a Geometry tag Digitization Data Decoding Reconstruction Id Dict. name * Structured according to amdb specific conventions Cabling Maps names ** Derived(not primary) from XML hopefully soon amdb blob = dump of the ascii file(active + XML dead matter) in a blob Muon Week - CERN

4. Geometry tags ATLAS-CSC-01-00-00 • ATLAS-CSC-01-02-00 • Based on Technical Drawings of Layout R (amdb version R01)but • Station positions (P-lines) account for Egg shape global deformation • default station position ≠ nominal layout • Additional random displacements (~1mm) and tilts (~1mrad) of stations with MDTs as static Alignment Corrections (A-lines) • A-lines loaded init time from the same source of P-lines (geom-DB, no Cond-DB) but applied as corrections (Delta Transforms) on top of the default position and orientation of the station • MuonGeoModel implementation fully driven by primary numbers in the Oracle tables • (=primary source) for the active part (good validation) • (≠primary source) for the inert materials (very limited validation) • Barrel Toroid, Endcap Toroids, Atlas Feet, Shielding (disk, forward and toroid) • many missing blocks Calorimeter Saddle, TGC supports, Big wheel supports … …others, some not yet implemented in Amdb Muon Week - CERN

5. Geometry tags • ATLAS-GEO-00-00-00 vs ATLAS-CSC-01-00-00 • Moving from Layout R in tech. drawings to the MS layout as installed (amdb version R03) • Active Geometry: • MDT HV-RO side checked and fixed for a few chambers • station positions fixed for a few stations • RPC layout in Small Sectors + RPC positioning in the stations with single RPC units + RPC chambers with cutouts + RPC special chambers heavily revisited • CSC position fixed (layer 2 installed not layer 1) • Dead Matter: • In the XML description: fixes to MDT Big Wheel, Calorimeter Saddle, TGC support; pos. of ID Patch Panels PP2; Muon Barrel + sect. 13) Access Platforms, Feet Struts, pos., BOL Support, Tie road, ECT cryostat fix • Validation of R03: VERY LIMITED UNTIL NOW – NEED HIGH STAT. SAMPLEs • hit relocation OK – Amdc vs MGM OK – No unexpected clashes involving active geo. • first simulation tests showed a problem with CSC now fixed • for reconstruction/trigger (LVL1 + HLT) emulation we need new RPC cabling maps (few chambers - BOG and S2/3 in BMS at  2 and 4- with #of strips changed w.r.t. old layouts) Muon Week - CERN

6. RPC layout in R03 As shown also from hit residuals studies with cosmic ray data, the RPC layout in the small sectors does not correspond to the nominal layout see B. Liberti et al http://indico.cern.ch/getFile.py/access?contribId=0&resId=0&materialId=slides&confId=32282 ATLAS-CSC-01-00-00 ATLAS-GEO-00-00-00 Muon Week - CERN

7. RPC layout in R03 BOG as an example of chamber with single RPC unit: in some cases inverted position of gas gaps and thick support panel • changed w.r.t. R01 in • position in the station • # of eta strips • cutouts s3 RPC chambers s2 RPC chambers BMS5 BMS2A/CX BMS4 BMS3A/CX BMS6 BMS4A/CX Muon Week - CERN

8. Dead Matter in GeoModel/GEANT from XML Andrea Dell’Acqua developed a XML -> GeoModel parser for a transparent translation of Amdb dead matter in GeoModel • no more painful hand coding of the dead matter shape and positioning • use directly primary source of dead matter description AGDD2Geo in 14.2.0 (not active yet in any default configuration) • Amdb blob (with XML dead matter) read from Oracle • all components in Amdb are translated into GeoModel volumes, hence Geant4 volumes via Geo2G4 • by job-option one can enable to built a selection; no changes needed for the moment in MuonGeoModel • planning to start with MDT/TGC supports in the big wheels • if tests in simulation are OK add platforms, services at eta 0, calo saddle, etc. • presumably wait longer before replacing components already existing in MuonGeoModel Muon Week - CERN

9. AGDD2Geo MDT supports AGDD2Geo required - some fixing of syntax of XML description in amdb (done in r03) - an update in Geo2G4 in order to handle assemblies of assemblies (done for 14.2.10) Muon Week - CERN

10. AGDD2Geo TGC supports Muon Week - CERN

11. AGDD2Geo Access platforms Active geo. (MuonGeoModel) + new dead together Muon Week - CERN

12. AGDD2Geo • TO DO in 14.2.0 and 14.2.10 • material consistency checks: • AGDD had extra materials with no • correspondence in Oracle yet. • geometry checks (mostly in • simulation) • check for unforeseen overlaps, for • correct material distribution • GEANT4 tracking performance • maybe the most critical chapter • (impact on simulation timing, memory) • reconstruction checks • make sure the whole chain from simulation to reconstruction works properly • After these checks – we’ll freeze, as default, a configuration of default options for MuonGeoModel + AGDD2Geo to enable the tested components in simulation and reconstruction Muon Week - CERN

13. Clash review – simulation robustness • Dennis Wright working on a very careful clash hunting and fixing • fixes in 14.2.0 • started from nominally aligned layouts, cured residual small active-active clashes due mostly to shared surfaces (introduced suitable tolerances on volume dimensions) • moved to misaligned layout: many clashes of tilted chamber corners (~100 mm) cured by reshaping a tighter station envelop, by subtracting and adding half cylinder shapes to a minimal trapezoid • event display becomes heavy • solved by enabling(in MC)/disabling(in Reco) this fine clash fixing procedure by job option • simplified spacer beam description + fixes (should improve G4 tracking perf.) + refine LB and CR description linking one object to the other to (close to reality) • fix BOG cutouts • attaching active-inert clashes • fixed feet description to fix a clash with BOG chambers work in r03 Muon Week - CERN

14. Clash review – simulation robustness • after 14.2.0 working on cutouts: • currently only cutouts in MDTs of BOG stations are implemented • strategy to implement the rest: • use GeoCutVolAction for RPCs and DEDs (class propagates cutouts in mother volume down to all daughters) • OK for above components because there aren't many sub-volumes • must handle MDTs differently to avoid creating too many boolean volumes • re-writing Mdt.cxx and parts of MultiLayer.cxx in order to generalize MDT cutouts to other cutout chambers besides BOGs • improvements in AMDB required in order to continue work in r03 Muon Week - CERN

15. Memory issues • MuonGeoModel budget ~ 130 MB (out of ~1GB allocated by simulation tasks, ~2GB allocated by reconstruction tasks) • 50 MB are purely from GeoModel • can be reduced to a minimum in reconstruction by forgetting all the internal details of detectors (i.e, components linked to readout geometry classes, used by reconstruction) • to be done • 80 MB are a tracking related cache (used to be built run-time on demand, since 14.1.0 is fully built init time) • can be turned on in simulation • easy and done • can be optimised (centrally, not in MuonGeoModel) Muon Week - CERN

16. FDR2: alignment constants loaded run-time Cool Folder MUONALIGN/MDT/BARREL System tested up to reconstruction ~1 year ago with old COOL versions and run/event based IoV definition MuonAlignmentDbTool loadParameters A-line container in storegate step 1 MuonDetectorTool::Align registered for call back against MUONALIGN/MDT/BARREL The Alignment wg provided Alines in COOL computed with an emulation of the optical al. system with IoV in the range of the FDR2 data sets just in time for the FDR2 start-up step 2 MuonDetectorManager updateAlignment compute deltaTransforms clear tracking cache update GeoModel transform tree Before FDR2 we have been able to test the access to the condDB by emulating fake events with time-stamps matching the A-lines IoV --- test OK but no integration of reconstruction clear/update MuonGeoModel tracking cache unable to test with coherent sim. data + cond. data in advance Muon Week - CERN

17. FDR2: alignment constants loaded run-time • The integration of reconstruction has been tried just at FDR2 – we found out what we missed • by default MuonGeoModel assumes no access to the cond DB • minimal change in configuration • tested on run 522090, before trying in FDR2 • worked fine if MuonTrackingGeometry disabled (otherwise a susp. crash) • integrated: but crash run-time on a data set 522080  disable • Of course testing in final full environment are mandatory to ensure no bugs are lurking around • a bug identified in MuonGeoModel in the mechanism for clearing the tracking related cache – maybe related to the observed crash • MuonAlignmentDbTool/MuonDetectorTool are designed to read a single folder from COOL when updated • but Optical alignment for Barrel / EndCap A / EndCap C are independent systems writing asynchronously into COOL ! • some redesign is needed • Better planning + better definition of responsibilities would have helped:goals of FDR2 for the muon alignment wg and subsequent requirements on muon software discussed in ~April but not updated as needed up to FDR2 start Muon Week - CERN

18. FDR2: alignment constants loaded run-time • From the test on run 522090, before trying in FDR2 • with MuonTrackingGeometry disabled and the extra conf. options Full reconstruction has been run and the effect of loading/not-loading the alignment constant was observed in muon reconstruction No diff. in the output of reco. in ECs since only barrel A-lines were read from COOL and passed to Muonboy by the MuonGeoModel MuonDetectorMgr rms = 470 mm MuonBoy reconstructed tracks (MS hits only) back extrapolated to IP d0condData-d0def.reco /mm barrel d0condData-d0def.reco /mm endcaps Muon Week - CERN

19. Summary of Muon DD functionality in recent and future releases In 14.2.0 / 14.2.10 • MuonGeoModel can handle old layouts + ATLAS-GEO-00-00-00 (much closer to ATLAS pit for active geo. than before) still need extensive validation • make sure we handle it in reconstruction (cablings updates for RPC !) • small differences in conf. for simulation and reconstruction (default): • caching flag OFF, fine clash removal ON • default dead matter as before (a part from minor fixes) • new dead matter (via XMLGeoModel parsing) will be validated in custom productions In 14.1.0.Y (FDR2 reconstruction release) and AtlasPoint1 branch • Try to finalize the access and use of condition data (access to more folders, full test up to reconstruction) for FDR 2 samples and for cosmic data (A-lines measured in P4/5 – available for barrel sector 5 and EC) By 14.3.0 integrate validated new dead matter and alignment data handling Muon Week - CERN

20. Conclusions • Lot of progress in many areas: • new dead matter • systematic clash fix • Data force to improve realism: • RPC layout, CSC layout • some revision of TGC probably necessary • Data and full scale exercise (as FDR2) demonstrate that progress/dev. of sw components is driven by muon wide objectives  improve communication  from a recent example: from FDR2 planning to Alignment wg and software wg (geometry + db access + checks are reco. level) • Still needed • better way of enforcing coherence: simul / reco / cablings svc.s • better definition of intermediate task “borders”  better scheduling of work to be done Muon Week - CERN