Mario Sitta 1 CERN – Mon. 7 Jul., 2008 Status of ITS v11Hybrid geometry Mario Sitta Univ. Piemonte...
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Transcript of Mario Sitta 1 CERN – Mon. 7 Jul., 2008 Status of ITS v11Hybrid geometry Mario Sitta Univ. Piemonte...
Mario Sitta 1CERN – Mon. 7 Jul., 2008
Status of ITSv11Hybrid geometry
Mario SittaUniv. Piemonte Orient. & INFNAlessandria
Mario Sitta 2CERN – Mon. 7 Jul., 2008
Status of ITS geometry
All sensitive volumes already coded in TGeo and checked against blue-prints
Mario Sitta 3CERN – Mon. 7 Jul., 2008
High degree of details
Mario Sitta 4CERN – Mon. 7 Jul., 2008
Status of ITS geometry
All sensitive volumes already coded in TGeo and checked against blue-prints
All services and supports till the SSD cone coded in TGeo and checked against blue-prints
Mario Sitta 5CERN – Mon. 7 Jul., 2008
High degree of details
Mario Sitta 6CERN – Mon. 7 Jul., 2008
Status of ITS geometry
All sensitive volumes already coded in TGeo and checked against blue-prints
All services and supports till the SSD cone coded in TGeo and checked against blue-prints
Services beyond the cone to the TPC interior and some supports (hook, rails) still in old Geant3 code (recode in progress)
Mario Sitta 7CERN – Mon. 7 Jul., 2008
Coarse geometry
Mario Sitta 8CERN – Mon. 7 Jul., 2008
Overlaps
Most of the internal overlaps removed
Removal of remaining overlaps in SSD geometry in progress (13 as of this morning trunk Rev. 27151 + correction files from A.Pulvirenti and E.Cattaruzza)
Overlaps with MUON absorber (8) and TPC (2) removed
Overlaps with FMD (36) still in place (should be checked with FMD people)
Mario Sitta 9CERN – Mon. 7 Jul., 2008
Material budget
Material budget of the sensitive volumes and internal support cones and cylinders checked against calculations; all volumes simulated as in real life
Material budget of the services along the cone checked against calculations; SDD and SSD cables simulated as average volumes
Mario Sitta 10CERN – Mon. 7 Jul., 2008
Ex. SDD cables on cones
Mario Sitta 11CERN – Mon. 7 Jul., 2008
Material budget
Material budget of the sensitive volumes and internal support cones and cylinders checked against calculations; all volumes simulated as in real life
Material budget of the services along the cone checked against calculations; SDD and SSD cables simulated as average volumes
Material budget outside cones: coarse approximation with Geant3 shapes, to be checked further
Mario Sitta 12CERN – Mon. 7 Jul., 2008
SPD services on cones
Main assembly with major volumes:
bus/MCM extenders (cut at the edge of the cones)
plates holding extenders
cooling tubes
Approximations:
straight cables (oriented with the same angle of the cone border)
all extenders of each kind (bus/MCM) built as a single unit
the resulting thickness of bus + MCM extenders gives the size of the hole
Mario Sitta 13CERN – Mon. 7 Jul., 2008
SPD services on cones (II)MCM extender
Plate
BUS extender
Cooling tube
Mario Sitta 14CERN – Mon. 7 Jul., 2008
SDD Survey
SDD sensor positions have been measured after mounting (by means of six fiducial marks located on the upper surface of each detector)
The measurements have been inserted in the survey DB long ago
Class for reading them in AliRoot in preparation:
basic methods to read the ideal (from geometry) and surveyed positions and to store the resulting AlignObj already done
actual code to generate the rototranslation matrices in progress