SP Far Detector Anode Panel, Cathode Panel, and Field Cage V. - - PowerPoint PPT Presentation

SP Far Detector

Anode Panel, Cathode Panel, and Field Cage

• V. Guarino

February 5, 2018

SP Far Detector

• Give an over view of DSS Design and APA Gaps
• Overview of Integration Model
• Areas where we need feedback from APA Consortium

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Current Status of DSS Design and FD Integration

• Feedthrough positions in cryostat have been fixed
• Preliminary DSS design has been completed. See DocDb 6311

paper for description and Appendix for detailed analysis

• Proto-DUNE models of the CPA/FC/Endwall have all been

adjusted for the FD geometry.

• An APA model has been created as a placeholder based on

frame and electronic box dimensions from PSL

• Model of Full Detector has been created and is integrated with

DSS and cryostat (see Docdb 6260)

• Focus of Detector modeling has been on integration in

cryostat, DSS design, and installation.

• DSS/CPA/FC/Endwall model all modeled in Inventor so

integration easy

• Need to work out details of APA/FC Interfaces

3

DSS Overview – Feed Throughs

Pitch of supports unfortunately does not match the pitch of the APAs

• APA/CPA supported on

beams 6.4m long with supports spaced at 4.8m

• Spacing and length are
• ptimized to minimize # of

feedthroughs and size of beam

DSS Overview

Feedthroughs that provide Support to the warm structure

Hanging rods that support Beams and allow lateral motion 4.8m Boundary between beams 6.4m The DSS provides support to the detector from the warm vessel

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DUNE Far Detector

Completed Panel Transportation

FC Panel Completed Panels are shuttled to their proper row

• n the DSS and ferried into

place inside the Cryostat CPA Panel APA Panel

DSS – Shuttle Beam

• A pair of north-south beams will be installed on the east end of cryostat.
• A shuttle beam will transverse these beams to deliver CPA/APAs to the correct position.
• N-S beams get removed after installation.
• Shuttle beam remains in place to support the endwall
• Designing a driven trolley for Shuttle Beam and installing APA

Get removed after installation Shuttle Beam Remains in place to support last APA and Endwall

APA Gaps During Cool Down

• Shrinkage can be accommodated in two

ways:

• The DSS beam can be continuous from the

center of the detector to the end of the detector; the beam would shrink toward the center and no gaps develop.

• Requires DSS supports to accommodate 80mm of

movement at the ends, the entire detector shrinks/moves

• The DSS beams can be segmented. Gaps open

up between APA.

• There is less movement of detector and DSS

supports accommodate a small shrinkage

• A current DSS design uses beams that are

6.4m long, which support typically 3 APAs. This design results in a zero gap developing between the three APA’s on the same beam but a 17mm gap opening up between adjacent APA’s that are on separate beam. Roughly there will be a 17mm gap between every 3rd and 4th APA.

• See DocDb 6011 for details and list of gaps

APA Boundary Gap (mm) End

• 1.40624

1 to 2 2 to 3 11.0976 3 to 4 4 to 5 5 to 6 17.408 6 to 7 7 to 8 8 to 9 17.408 9 to 10 10 to 11 17.408 11 to 12 12 to 13 13 to 14 17.408 14 to 15 15 to 16 16 to 17 17.408 17 to 18 18 to 19 19 to 20 17.408 20 to 21 21 to 22 22 to 23 17.408 23 to 24 24 to 25 17.408 Far End of 25 2.49424

SP FD Integration

• Drawings/3D PDF/STP files have been made of

assembled detector

• See DocDb 6260
• Need to resolve:
• Height of APA relative to FC
• APA/FC latches
• Yoke design and mounting points

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SP FD Integration

• Detailed drawing of the detector in the cryostat

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SP FD Integration

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SP FD Integration

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SP FD Integration

• Currently have only placeholders for electronic

boxes and APA length

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Ongoing Work

• DSS Design is well developed.
• Vertical Position of detector in cryostat needs to be

finalized

• Trolleys/mounts of CPA/APA need to be finalized

(will be based on proto-Dune designs)

• Is yoke design finalized?
• Currently working on APA/Endwall interface
• Re-examine APA/FC latches
• Long term – keep integration model updated to

reflect current design

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