1. Hall D Design Status GlueX Collaboration Meeting JLab, Ravi Anumagalla

2. Hall D Components Solenoid –Iron yokes –Cryostats –Filler plates Veto –Scintillators –Iron plates Cerenkov detector –Support Structure –Rails Cylindrical Drift Chamber Forward Drift chamber Barrel Calorimeter } Support Structures for maintenance and integration

3. CDC FDCBarrel Calorimeter Iron Yokes VETO Cryo Stat Target Vertex Detector

4. More data needed for Cerenkov detector How is the veto fixed to the upstream end ?

5. Top View of the HALL The Platform is 8 ft from the base Supports the extracted components Assists in assembling the parts Detector Platform

6. The components are extracted by “4 ft” from each o other to facilitate future maintenance The detector requires a “platform” to support the ex t extracted components

7. Structures are designed to accommodate the solenoid and the Cerenkov detector Rails are provided to move the components backwards for having access to the FDC’s for maintenance Support Structures

8. A hole is necessary in the platform to gain access to the upstream veto Rails are provided to extract the veto in the forward direction Service Platform

9. The CDC enclosed in the Fiber Glass Cylinder is inserted into the Barrel Calorimeter supported by the rails CDC Barrel Calorimeter

10. CDCFiber Glass Cylinders with the railsBarrel Calorimeter Rails Attached to the Fiber glass

11. A removable access platform is used for maintenance of CDC, target and vertex detector

12. The temporary platform is supported on the rollers Alignment features can be included to maintain the precision while extraction/installation

14. CONCLUSION Support structures for the hall D components have been built and drawing are created for fabrication Concept extraction mechanisms have been proposed for review Need a discussion with the individual subsystem collaborators to verify the geometry of the models in CAD ( Barrel Calorimeter, Forward VETO,CDC, FDC, Target and Vertex Detector) Comments and suggestions for improving the Design

15. Cake Pan Vacuum Tank Cover Helium Vessel Inner Panel Outer Panel Intermediate Panel Support & Side Panels 73 Dia 77.5 Dia 114 Dia Cross section of coil 2,3,4 All Dimension Are In Inches

16. Cross section of coil 2,3,4

23. Hall D thermo-siphon

24. Barrel Calorimeter CDC Pls Refer next slide Model 2, CDC Extraction CDC(O.D)=120CM Barrel Calorimeter(I.D)=130cm

25. Bottom plate Top plate Rail Rail Block

26. An Alternate design, used to extract the Inner components of the detector : Plates are bolted to the respective Fiber glass cylinders Components are extracted by sliding on the rails 4.87 meters 2 meters

31. CDC Cable Connectors Barrel Calorimeter CDC

32. Space occupied by the cables

33. 10 layers of ribbon cables, each layer has 61 cables, Total 610 cables have been modeled, required 540 cables 360 Coax-Ribbon Forward Drift Cathodes(3mm thk) 180 Twisted pair Ribbon Forward Drift Anodes (2mm thk) 120 cm (Dia) 130 cm (Dia) 72, ¼ inch ( 24 CDC HV cables 24 FDC HV cables 24 FDC Gas Connections)

34. ΔP/ρg = f (L/D) V 2 /2g