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TPC Support and Constraint TPC Support

TPC Support and Constraint TPC Support. Baseline support system (Assumes “gravity” constraint) Loading APA support detail CPA support detail End wall support concept Some comments on contraction. TPC Constraint. Effect of pressure on TPC position Alternative #1 – Springs

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TPC Support and Constraint TPC Support

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  1. TPC Support and ConstraintTPC Support • Baseline support system (Assumes “gravity” constraint) • Loading • APA support detail • CPA support detail • End wall support concept • Some comments on contraction TPC Constraint • Effect of pressure on TPC position • Alternative #1 – Springs • Alternative #2 – Rails? • Alternative #3a &3b – Rigid support for center rail Installation Questions Dan Wenman

  2. Baseline support system (Assumes “gravity” constraint) Minimum constraint – Safest for accommodating CTE • If supporting cryo pipes, minimal horizontal loads can be transferred to structure • Also strain in cables could affect TPC position if not careful Dan Wenman

  3. Loading – protoDUNE (kg) Assumes no ground plane on bottom 214 214 214 214 135 135 408 300? 408 135 135 135 135 408 300? 408 135 135 135 135 408 300? 408 135 135 214 214 214 214 Dan Wenman

  4. Loading for DUNE shown on protoDUNE footprint (kg) With ground plane at the bottom 428 428 428 428 170 816 600? 170 170 816 170 170 816 600? 170 170 816 170 170 816 600? 170 170 816 170 428 428 428 428 Dan Wenman

  5. APA Support Detail Dan Wenman

  6. APA support detail Simple but custom trolley with swivel for compactness. Dan Wenman

  7. CPA Support Detail • CPA to beam needs definition. • Need to finalize plane locations. (parameter drawing is needed.) • Support to CPA as designed will accommodate differential CTE. • Two point support may cause tipping in x-z plane. Dan Wenman

  8. Endwall Support Concept • Vertical beam takes load to rail • Connection to CPA is slotted and probably travels with wall and is connected to CPA from inside • FC to beam connection not shown Dan Wenman

  9. Some comments on contraction • APA plane contraction requires 150mm “nozzle” in FD. Maybe larger depending on true position. • Anticipate CPA to beam differential CTE? • Start with gap between CPAs? • FC from slight trapezoid to rectangle? • Must manage differential CTE of GP to FC. Dan Wenman

  10. Effect of pressure on position – Equivalent system with all mass at the TPC c.g.. Analysis based on one APA length of TPC Dan Wenman

  11. Effect of pressure on position – Equivalent system with all mass at the TPC c.g.. Analysis based on one APA length of TPC. All values are based on 1Pa differential pressure on 1 CPA panel Top stability protoDUNE 2mm Bottom stability protoDUNE 8mm Top stability DUNE 1mm Bottom stability DUNE 9mm Dan Wenman

  12. Alternative #1 - springs Rail Very conceptual Dan Wenman

  13. Alternative #2 – Rails? Tie rod Plane could be constrained at the bottom in y with a rail.

  14. Alternative 3a and 3b rigid support to center rail

  15. Installation • Compatibility with Installation needs verification • “Toaster” installation concept has advantages may change things Dan Wenman

  16. Questions • What are practical positional tolerances for support feedthrough locations? • Are there any issues with the beam pipe (or HV) if we shrink towards the center? • Where are cryo pipes? How to support? Will they be vibrating? • Corrugation pitch vs Roof belt pitch? • Max cool down rate to design for? • Max temperature gradient? • Roof deflection for protoDUNE? • Ullage temperature? • Fabrication locational tolerance for feed-thrus? • Do invar corners offer any anchoring/constraining possibilities? • Can we have a larger plug and then add reinforcing after the plug is installed? Dan Wenman

  17. Back up slides Dan Wenman

  18. Dan Wenman

  19. APA Rail mounting ISOview Aluminum seal plate lightly spring loaded against feedthru Dan Wenman

  20. Rail mounting Chain for connection to adjustable mount point above roof. Seal plate spring Yoke and clevis connection through slots in beam flange collar Dan Wenman

  21. Fin dimensions Tab to be added to e-plate Dan Wenman

  22. Cable Routing Cable route over top of e-plate and out the front of the faraday cage to the cable feedthrough. Cable envelope (need to adjust to miss GP). Dan Wenman

  23. APA to FC interface In order to avoid an offset load, this needs to be a moment connection Advantages #1: structurally efficient, doesn’t interfere with support. Dan Wenman

  24. End view of bottom connection Tee profile mounted to bottom of APA using spacers and frame rivnuts Dan Wenman

  25. Dan Wenman

  26. Dan Wenman

  27. Tie rod between APA’s to keep spacing and prevent rotation Dan Wenman

  28. ISO view of tie rod for “center” row of APA’s. For one APA plane on protoDUNE. Dan Wenman

  29. 200kg/APA 200kg/APA Dan Wenman

  30. CTE info • 304 SS 2.8mm/m • G-10 warp = 2.1mm/m • Fiberglass axial = 1.65mm/m Dan Wenman

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