1. XML Description of ECAL Geometry  For XML description of ECAL Geometry were used: Det/XmlDDDB/v5, Det/XmlEditor/v4, Det/DetDesk/v6, Vis/GaudiLab/v1r4 Det/XmlDDDB/v5, Det/XmlEditor/v4, Det/DetDesk/v6, Vis/GaudiLab/v1r4  ECAL TDR, Engineering Drawings of ECAL  In XML Description the real Design was simplified Galina Pakhlova ITEP, Moscow Calorimeter Software Meeting CERN 22/6/2001

2. 2 “XML tree” ~/Det/XmlDDDB/v*/DDDB > dddb.xml geometry.xml structure.xml materials DTD DetElem(Muon,Ecal,Magnet…) ~/Ecal > geometry.xml structure.xml Modules.xml Installation.xml Modules Installation ~/Modules > related_to_Modules.xml ~/Installation > related _to_ Installation_of_Modules.xml

3. 3 ECAL XML Parameters Definition ~/Ecal/geometry.xml Names contain 10 – 25 signs but VERY mnemonic Names contain 10 – 25 signs but VERY mnemonic Instead of Cell Size Module Size Instead of Cell Size Module Size

4. 4 Electromagnetic Electromagnetic Calorimeter Engineering design of detector: 3312 modules

5. 5 Visualization of ECAL Sectors Logical Volumes ECAL Logical Volume includes Outer, Middle, Inner Sectors and Inner Support Frame Logical Volumes Subtractions: box -box; box -tubs Front View

6. 6 Installation Modules into ECAL Inner&Middle Sectors hkhk Into ECAL Logical Volume were installed : Inner and Middle Modules into ECAL Inner and Outer Sections Simplified Inner Support Frame into the center Outer Section contains too many modules 2Dim paramphysvol is needed

7. 7 Engineering Design of ECAL Modules

8. 8 XML description of ECAL Module 2 1 3 4 Logical Volume of Modules includes: 1.Front Cover 2.Assembly Stack 3.Back Cover 4.Read Out Box Solids 1,2,3,4: box Volumes 1,3,4 are empty yet

9. 9 Assembly of ECAL Inner Section Module Assembly of scintillator, lead, fibres and the readout part for Inner Section Modules Engineering Design

10. 10 Visualization of ECAL Inner Assembly Stack Inner Assembly Stack : 2 Plastic Layers 2 Steel Pressing Matrixes 4 Steel Stretching Tapes 66 Pb Plates 67 Sc Plates (Sc Plates divided into 9 parts) All Solids box only Fiber tubs No fibres installed yet! 2Dim paramphysvol is needed

11. 11 How to install Fibers? Though each plate of Inner&Middle Modules (Paper+Sc+Paper+Pb+ Paper+Sc+…) go 12x12 Holes + 12x12 Fibers In Outer Module 8x8 Holes+8x8 Fibers How to install?

12. 12 ECAL Geometry XML Description Conclusions  Was done:  The first step into XML description of ECAL Geometry  The simplified description of Inner, Middle and Outer Modules and Assembly Stacks  Modules were installed into Middle and Inner Section of ECAL, Simplified Inner Support Frame into the center  Should to be done the nearest time:  Fiber Installation into Modules Assembly Stack, Outer Models Installation into ECAL Outer Section, Stainless Steel Band Installation around Rows of Modules using new version of XML with 2Dim paramphysvol  Materials.xml description

13. 13 Problems of XML Description of Geometry  “Subtraction&Rotation” problem : Subtraction = Solid1-Solid2 Solid2 rotates without any request, may be “Rotation Memory”? If fix Solid2_Rotation=0 and exclude other Sub Detectors: Solid2 rotation disappears…  Installation Modules into Middle and Outer Sectors, Fibers into Assembly Stack without 2Dim paramphysvol too long procedure  Visualization is not too friendly yet…