1. Warm structure requirements : https://edms.cern.ch/document/1834010
Top penetrations :
Jack Fowler | DUNE SP feed thru interfaces

2. Jack Fowler | DUNE SP feed thru interfaces

3. Interface topic – General feed thrus
Pipe diameters for crossing tubes, min clear diameter. Interference with warm structure?
Which feed thrus are location critical?
Flange sizes.
Height of warm side tube and support to warm structure where required.
GAr purge port – location, size, manifold, where does it go, and what is done with it?
Where are CF 63 ports required and at what specific location?
Who provides the warm crossing tubes and flanges, purge ports and associated hardware, internal cryogenic piping and supports?
Design responsibility?
Location and tolerance expectations?
Jack Fowler | DUNE SP feed thru interfaces

4. Interface topic - Cryogenic piping
Dune is responsible, LBNF is currently working on the design.
Additional CFD analysis needed?
Procurement?
Installation?
Support from cryostat?
Pump manifolds – extensions to the suction inlets for improved Ar purity. Similar to the distribution/purge manifolds. These attach to the inside of the Protego valves. Interface with cold membrane, Protego valve, and area for TPC installation.
Jack Fowler | DUNE SP feed thru interfaces

5. Interface topic - Instrumentation
Over the detector, near center line.
Radioactive sources, ESH issues.
Laser ports, proximity to APA and integrated into upper FC.
Laser ESH issues.
Design?
Financial responsibilities?
Jack Fowler | DUNE SP feed thru interfaces

6. Interface topic - Spares
Preferred to have these not over the detector. But the areas at the ends are already crowded.
Jack Fowler | DUNE SP feed thru interfaces

7. Additional feed thrus
5 additional support feed thrus needed on both the east and west ends to eliminate cantilever of the end wall loads. (total 10) This will require some movement of the HV feed thrus and one cryogenic spare. Question, will these accommodate the switchyard needed to move the TPC elements N/S in the detector.
4 additional instrumentation feed thrus near the E/W CL of detector. In line with the other instrumentation feed thrus. There may be conflict with the GAr relief feed thrus. (4 total)
Add CF 63 side ports on all of the warm crossing tubes to allow for ancillary cabling, fibers and instrumentation.
Laser ports near the APA plane. Proposed 16 ports skewed near east and west ends of the detector. (Total 16?)
Spares – the preference for spares is to located them not over the detector volume. However, the open ends of the detector are already crowded.
Jack Fowler | DUNE SP feed thru interfaces

8. Known initiatives
We know that discussions are happening around the proposed layout
For a much simpler detector support system
For a laser calibration system
For more spare penetrations
We plan more discussions around the problem 1) and we will converge
before mid November, before we sign the contract for the final engineering
of the cold vessel
Difficult to understand the time scale of the 2)
We will add a few strategical spare penetrations in due time
Jack Fowler | DUNE SP feed thru interfaces

9. Plan to finalize
Sign off from the cryogenics and the detector in Nov 17.
Changes after sign off?
Approval mechanism.
Jack Fowler | DUNE SP feed thru interfaces

10. Back ups
Jack Fowler | DUNE SP feed thru interfaces

11. implemented since last review (end of 2016)
Design modification
implemented since last review (end of 2016)
Opening for detector insertion: closure process defined (will be shown in installation sequence on August, 22nd) , and design adapted:
Top horizontal beam sliced in 3 pieces,
Warm membrane with specific reinforcement
2.6m
12.4m
2.5m
Jack Fowler | DUNE SP feed thru interfaces

12. Integrated model cryostat and detector
Jack Fowler | DUNE SP feed thru interfaces

13. Integrated envelope drawings
Jack Fowler | DUNE SP feed thru interfaces

14. Positioning the TPC
The main drivers for the position of the TPC inside the cryostat are:
The proximity of the HV from the cryogenic piping on the west end of the cryostat. Also, the symmetry between the cryostat and TPC should be considered.
The size of the LAr manifolds below the TPC and their position with respect to the CPA/HV.
The installation space on the east end for translating the TPC components.
Maintaining a 5% ullage. For this cryostat height, this translates to 700 mm. The liquid depth would be ~ mm.
Jack Fowler | DUNE SP feed thru interfaces

15. APA
Jack Fowler | DUNE SP feed thru interfaces

16. CPA and Upper/lower FC
Jack Fowler | DUNE SP feed thru interfaces

17. End wall FC
Jack Fowler | DUNE SP feed thru interfaces

18. Integrated Detector
Jack Fowler | DUNE SP feed thru interfaces

19. Jack Fowler | DUNE SP feed thru interfaces

20. Discussion points
Summary of all of the current work on the layout of the SP DUNE cryostat.
SP detector envelopes – scaled from ProtoDUNE elements. Develop envelope detector drawings for integration. (B Flight)
Cryostat feed thrus for detector (E Seletskaya, B Lacarelle, D Mladenov, M Nessi)
Detector support – adequate to support installation rail system. Support at least every 4.8 m.
Cable and electronics – one feed thru for 2 APAs, or 75 total. One electronic rack per feed thru.
Cryostat feed thrus for cryogenics (D Montanari)
Supply piping for liquid and cool down.
Return manifolds to improve Argon purity.
Detector support (V Guarino, D Wenman)
Ancillary feed thrus (J Stewart)
Jack Fowler | DUNE SP feed thru interfaces

21. Link to cryostat drawings and step file
Jack Fowler | DUNE SP feed thru interfaces

22. Jack Fowler | DUNE SP feed thru interfaces