Hall D Design Status GlueX Collaboration Meeting JLab, Ravi Anumagalla.
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Transcript of Hall D Design Status GlueX Collaboration Meeting JLab, Ravi Anumagalla.
![Page 1: Hall D Design Status GlueX Collaboration Meeting JLab, Ravi Anumagalla.](https://reader036.fdocuments.net/reader036/viewer/2022062803/56649f345503460f94c50fd0/html5/thumbnails/1.jpg)
Hall D Design StatusGlueX Collaboration Meeting JLab,
Ravi Anumagalla
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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
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CDC
FDC Barrel Calorimeter
Iron Yokes
VETO
Cryo Stat
Target
Vertex Detector
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More data needed for Cerenkov detector
How is the veto fixed to the upstream end ?
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Top View of the HALL
• The Platform is 8 ft from the base
• Supports the extracted components
• Assists in assembling the parts
Detector Platform
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• 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
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• 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
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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
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The CDC enclosed in the Fiber Glass Cylinder is inserted into the Barrel Calorimeter supported by the rails
CDC
Barrel Calorimeter
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CDC Fiber Glass Cylinders with the rails Barrel Calorimeter
Rails Attached to the Fiber glass
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A removable access platform is used for maintenance of CDC, target and vertex detector
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The temporary platform is supported on the rollers
Alignment features can be included to maintain the precision while extraction/installation
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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
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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
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Cross section of coil 2,3,4
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Hall D thermo-siphon
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Barrel Calorimeter
CDC
Pls Refer next slide
Model 2, CDC Extraction
CDC(O.D)=120CM
Barrel Calorimeter(I.D)=130cm
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Bottom plate
Top plateRail
Rail Block
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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
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CDC Cable Connectors
Barrel Calorimeter
CDC
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Space occupied by the cables
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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)
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ΔP/ρg = f (L/D) V2/2g
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