Download - Hall D Design Status GlueX Collaboration Meeting JLab, December 11-13, 2003 Ravi Anumagalla
Hall D Design StatusGlueX Collaboration Meeting
JLab, December 11-13, 2003 Ravi Anumagalla
Hall D Subsystems
• Solenoid – Iron yokes – Cryostats– Filler plates
• Veto – Scintillators– Iron plates
• Cerenkov detector • Cylindrical Drift Chamber• Forward Drift chamber • Replacement of thermal shields in the cryostat• Barrel Calorimeter
} Require
Support Structures &
Maintenance Platforms
Work is being done to support the BC to the iron yokes
CDC
FDC Barrel Calorimeter
Iron Yokes
VETO
Cryo Stat
Target
Vertex Detector
More data needed for Cerenkov detector
How is the veto fixed to the upstream end ?
• 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
• 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
Top View of the HALL
• The Platform is 8 ft from the base
• Supports the extracted
components
• Assists in assembling the parts
Detector Platform
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
The CDC enclosed in the Fiber Glass Cylinder is inserted into the Barrel Calorimeter supported by the rails
CDC
Barrel Calorimeter
CDC OD : 120cm
BC OD : 130cm
CDC Fiber Glass Cylinders with the rails Barrel Calorimeter
Rails Attached to the Fiber glass
A removable access platform is used for maintenance of CDC, target and vertex detector
The temporary platform is supported on the rollers
Alignment features can be included to maintain the precision while extraction/installation
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