1. Installation of the T600 at Fermilab Fermilab, February 15, 20161

2. Foreword The installation and start of operation of the T600 detector at Fermilab will require a number of actions that will include: Agreements and assumption of responsibilities Definition of workpackages including definition of resources Procurements Preparatory works Mechanical installation Cabling Tests and final acceptance tests Pre-commissioning phases Commissioning Operation The following document illustrates the sequence of operations for the installation and preparation for commissioning of the T600 detector. Fermilab, February 15, 2016Slide# : 2

3. Operations to be completed at FNAL before arrival of equipment Civil engineering (done) Doors installation Access road Building internal cranes Power installation (main switches) Ventilation installation safety power installation (at least for the cranes) light installation safety light installation Beneficial occupancy at ground level (this will set the T=0 for unloading the trucks and start operations). Beneficial occupancy at the pit level (this will set the T=0 for final installation). All these operations are under the responsibility of FNAL, including the necessary agreements and procurements for unloading the trucks. Fermilab, February 15, 2016Slide# : 3

4. WARM VESSEL INSTALLATION (BOTTOM) Fermilab, February 15, 2016Slide# : 4

5. Warm vessel bottom pre-assembly in the pit (upside-down) The structure basement will be assembled (bolted) on adequately aligned concrete supports in the pit, FACE DOWN. Possibly, the lateral walls will also be assembled in parallel at the ground level, if adequate space and facilities are available. Requirements to FNAL: Equipped space, cranes, crane drivers, concrete supports (aligned and surveyed), mains, ventilation, heating. Pit level Fermilab, February 15, 2016Slide# : 5 Bolted structure Main supports (20X) (also bolted) External skin Aligned and surveyed concrete supports (20X)

6. Warm vessel bottom pre-assembly in the pit (skin welding) The structure basement will be rotated (180°) and put in the final position. The external skin elements will be joined and tested for leak tightness. A final survey of the planarity of the supporting elements will be performed. Temporary grounding of the metallic structure is required. Requirements to FNAL: Equipped space, cranes, crane drivers, mains, temporary grounding, ventilation, heating, welders, TIG welding tool, fumes detectors (for welds), helium, helium leak detectors. welds on the external skin Pit level Fermilab, February 15, 2016Slide# : 6 Aligned and surveyed concrete supports (20X) Flip 180°

7. Install all walls elements to form the lower part of the vessel The lateral walls will be pre-assembled, if adequate space is available, outside the pit. The external Stainless Steel skin will be welded and tested for leak tightness. The lateral walls will be put in place and bolted to the basement and to each other. The external Stainless Steel skins will be welded together and tested for Helium leak tightness. A final survey of the geometry will be performed. Requirements to FNAL: reference support areas aligned and surveyed, cranes, crane drivers, mains, ventilation, heating, temporary grounding, welders, TIG welding tool, fumes detectors, helium, helium leak detectors. welds on the external skin to be done in the pit) Fermilab, February 15, 2016Slide# : 7 Welds on the external skin to be don at the ground level Bolted connections

8. Prepare for insulation installation on the lower part of the vessel Rods to support the insulation panels are installed. Close all lateral penetations, if any. Perform a final leak test on the lower part of the warm structure. Requirements to FNAL: Mains, ventilation, heating, temporary grounding, fumes detectors, helium, helium leak detectors. Rods to support insulation panels Fermilab, February 15, 2016Slide# : 8

9. Install thermal insulation on the lower part Thermal insulation panels will put in place for the basement and the lateral walls. High stiffness elements will be installed in correspondence with the 20 supports. Sensors will be installed inside the insulation panels. Requirements to FNAL: placements surveys, mains, ventilation, heating. Thermal insulation panels High stiffness elements Fermilab, February 15, 2016Slide# : 9 Welds on the external skin

10. Install cold feet for cold vessels support The supports for the two colds vessels will be delivered to FNAL. They allow correct positioning of the vessels before, during and after the cool down and filling. The cold feet will be installed, adjusted in position and surveyed. Requirements to FNAL: placements surveys, cranes, crane drivers, mains, ventilation, heating. Cold Feet (20X) Fermilab, February 15, 2016Slide# : 10

11. Thermal shields assembly on the lower part Thermal shields will be transported to FNAL in large sub-components (22 pieces). Bottom and lateral parts will be assembled with the input lines and tested to 10 bars (operating pressure is 2.3 bars). Requirements to FNAL: cranes, cranes drivers, mains, ventilation, heating, safety for tests, Nitrogen bottles for pressure tests. Thermal Shields Fermilab, February 15, 2016Slide# : 11

12. COLD VESSELS INSTALLATION Fermilab, February 15, 2016Slide# : 12

13. Installation of the cold vessels After unloading from the truck and placement in the top building, the cold vessels will be inspected both externally and internally for general integrity of the TPCs. The feet under the cold vessels will be then installed prior to install the vessels in the final location inside the pit. Requirements to FNAL: internal and external cranes, unloading/loading personnel, moving docks, surveys, mains, ventilation, heating. Fermilab, February 15, 2016Slide# : 13

14. Installation of Chimneys and final internal operations Readout cables will be taken from the inside of the cold vessels though the connecting “chimneys”. A survey of the TPCs will be performed. The ceramic resistances that connect the race tracks will be put in place. All other vacuum tight connections crossing the thermal insulation will be installed, including the pipe for LAr filling and recirculation. The manholes will be then definitively sealed. Requirements to FNAL: cranes, crane drivers, mains, ventilation, heating. Fermilab, February 15, 2016Slide# : 14 Chimneys LAr Filling line Internal cables LAr Distribution line

15. Internal vacuum tests Vacuum pumps, valves, and vacuum gauges will be transported to FNAL and installed on the chimneys. All ports of the Argon circuit (“chimneys”, etc.) will be temporarily closed and vacuum pumps will be installed on each container and on the container walls. All installed connections will be tested for helium leak tightness (10 -8 mbar x liters / s). Requirements to FNAL: mains, ventilation, heating, technicians for chimneys and flanges installation and sealing, helium, helium leak detectors, safety and support for tests. Fermilab, February 15, 2016Slide# : 15

16. Thermal shield top assembly and test The vacuum equipment will be removed and the top part of the thermal shield will be installed together with the output lines and all the circuit be tested again at 10 bars. The grounding connection from inside the insulation to the outside will be installed Requirements to FNAL: cranes, crane drivers, mains, ventilation, heating, safety for tests. Fermilab, February 15, 2016Slide# : 16 Thermal shield top

17. WARM VESSELS ROOF Fermilab, February 15, 2016Slide# : 17

18. Step 13 – Installation of electrical feedthroghs The warm vessel structure will be prepared at the ground level in 4-5 subcomponents. The thermal insulation will be installed on each subcomponent. Requirements to FNAL: cranes, crane drivers, mains, ventilation, heating, crane. Warm vessel roof preparation Fermilab, February 15, 2016Slide# : 18 ≈ 5 m St. Steel structure (bolted) St. Steel external skin (welded) Thermal Insulation (glued and supported by rods) Holes for the chimneys Subcomponents

19. Step 13 – Installation of electrical feedthroghs The first part of the warm vessel roof will be put in position, bolted on the lower structure and the external skin will be welded to the lower structure skin. Barriers and walkways will be also installed on the roof first part. Requirements to FNAL: cranes, crane drivers, mains, ventilation, heating, welders, TIG welding tool, fumes detectors. Warm vessel roof installation Fermilab, February 15, 2016Slide# : 19 Bolted connections Continuous TIG weld Top warm vessel roof first sub-component

20. Step 13 – Installation of electrical feedthroghs The other parts of the warm vessel roof will be put in position, one by one, bolted on the lower structure and the external skin will be welded to the lower structure skin and to the previous part. Barriers and walkways will be also installed on the roof first part. Requirements to FNAL: cranes, crane drivers, mains, ventilation, heating, welders, TIG welding tool, fumes detectors. Warm vessel roof installation Fermilab, February 15, 2016Slide# : 20 Bolted connections Continuous TIG weld Top warm vessel roof second sub-component

21. Installation of flexible joints Rubber (neoprene) joints will be attached between the external stainless steel skin and the “chimneys” to ensure tightness of the insulation volume and allow displacement of the chimneys during cool down. The tightness of the rubber joints and of the entire warm structure will be tested. Requirements to FNAL: mains, ventilation, heating, helium, leak detector, safety for tests. Fermilab, February 15, 2016Slide# : 21 Rubber Joints

22. ON CRYOSTAT ELECTRONICS INSTALLATION Fermilab, February 15, 2016Slide# : 22

23. Installation of external joints Two main activities will be carried on, in parallel, from this point on. Installation of the external joints on the chimneys (crosses); installation of argon and nitrogen external piping. Requirements to FNAL: mains, ventilation, heating, crane, crane drivers, support of technicians for mech. asseemblies Fermilab, February 15, 2016Slide# : 23 External joints (crosses)

24. Step 13 – Installation of electrical feedthroghs The electrical feedthroughs for the wires and PMTs readout and Voltage supply will be installed with the baskets to host the R/O electronic boards. The optical feedthroughs for the PMTs calibration will be installed. Requirements: mains, ventilation, heating, crane, crane drivers, support of technicians for mech. assemblies Installation of feedthroghs and electronics baskets Fermilab, February 15, 2016Slide# : 24

25. Step 13 – Installation of electrical feedthroghs Install all the trays for the cables and optical fibers (power supply, HV distribution, PMTs, wires and CRT supply and readout, sensors and other equipment). Requirements: mains, ventilation, heating, crane. Installation of cables and optical fibers trays Fermilab, February 15, 2016Slide# : 25 Signal and HV cable and optical fiber trays

26. Step 13 – Installation of electrical feedthroghs Install all the LV and HV power supplies, the R/O boards both for the wires and for PMTs and connect all the cables and optical fibers. Make connectivity tests of all the electronic chains. Requirements: mains, ventilation, heating. Installation of PWR and HV supplies and on detector electronics Fermilab, February 15, 2016Slide# : 26 Supply and R/O cables +optical fibers

27. EXTERNAL CRYOGENICS Fermilab, February 15, 2016Slide# : 27

28. Step 13 – Installation of electrical feedthroghs The external cryogenic equipment will be procured, installed and tested. This will include storage dewars, liquid transfer lines and gas exhaust lines both for LN2 and LAr. A pre- filter of adequate capacity will also be installed for the T600 filling. All safety and control equipment will also be installed together with the compressed air distribution. Requirements: mains, ventilation, heating, safety for tests, compressed air. Procurement and installation of external cryogenics equipment LAr Storage Pre-Filter LN2 Storage cryostat Fermilab, February 15, 2016Slide# : 28 Ground Level Building To proximity cryogenics

29. PROXIMITY CRYOGENICS Fermilab, February 15, 2016Slide# : 29

30. Step 13 – Installation of electrical feedthroghs Gas and liquid recirculation systems will be installed together with safety valves, manual valves, pressure and vacuum gauges, until the argon circuit is fully installed and sealed. Requirements: mains, ventilation, heating, crane. Complete the argon circuit LAr pump LAr Filters GAr Filters Fermilab, February 15, 2016Slide# : 30

31. Step 13 – Installation of electrical feedthroghs The argon volumes are put to a slight overpressure (≈150 mbar). The absolute pressure will be monitored over few days to search for large leaks. Pressure leak test (pre-commissioning – 1) LAr pump LAr Filters GAr Filters Requirements: mains, ventilation, heating, oxygen deficiency sensors, argon gas (100 m 3 ). Fermilab, February 15, 2016Slide# : 31

32. Step 13 – Installation of electrical feedthroghs Vacuum pumps and gauges will be installed and tested Requirements: mains, ventilation, heating, crane, compressed air. Installation of vacuum pumps and gauges Turbo pumps (4X)Turbo Pumps (4X) Roughing pumps (5x) Fermilab, February 15, 2016Slide# : 32

33. Step 13 – Installation of electrical feedthroghs Vacuum will be started. Helium leak tests will be done on all external connections of the argon circuit, the purification filters will be opened as a last part of the leak tests. Vacuum pumping will continue until the final commissioning phases. Requirements: mains, ventilation, heating, compressed air, helium, helium leak detectors, safety for tests. Vacuum and Helium leak tests (pre-commissioning-2) Fermilab, February 15, 2016Slide# : 33

34. Step 13 – Installation of electrical feedthroghs All Nitrogen circuit will be installed, including pumps, valves and gauges and controls Requirements: mains, ventilation, heating, crane. Complete the Nitrogen circuit LAr pump LAr Filters GAr Filters LN2 pump Phase separator Fermilab, February 15, 2016Slide# : 34

35. Step 13 – Installation of electrical feedthroghs The external cryogenics equipment (storage dewars, transfer lines, controls) will be connected to the apparatus. Requirements: mains, ventilation, heating, crane. Connect the external cryogenics LAr Storage Pre-Filter LN2 Storage Fermilab, February 15, 2016Slide# : 35

36. Step 13 – Installation of electrical feedthroghs Nitrogen circuits will tested according to the design maximum pressure. CSN2, September 22, 2015 Slide: 36 Requirements: mains, ventilation, heating, oxygen deficiency sensors, safety for tests, nitrogen gas (100 m 3 ). Pressure test of the Nitrogen circuit LAr pump LAr Filters GAr Filters LN2 pump Phase separator Fermilab, February 15, 2016Slide# : 36

37. EXTERNAL CABLING Fermilab, February 15, 2016Slide# : 37

38. Step 13 – Installation of electrical feedthroghs Electrical distribution cabinets, optical switches and other communication equipment and all connections to the apparatus, including HV, CRT, cabinets and cabling for cryogenics and safety sensors, will be put in place. Also compressed air for valves will be distributed. Requirements: mains, ventilation, heating, compressed air. External cabling LAr pump LAr Filters GAr Filters LN2 pump Phase separator Power Supplies R/O Electronics supply Cryo controls and supply Communication Cmp. Air Fermilab, February 15, 2016Slide# : 38

39. Step 13 – Installation of electrical feedthroghs All communications will be tested. R/O (wires, PMTs and CRT) electronics will be tested with test pulses. Electronic noise will be measured and mitigation actions will be taken, if needed. Requirements: mains, ventilation, heating, compressed air. Test comms and El. noise (Pre-commissioning-3) Power Supplies R/O Electronics supply Cryo controls and supply Communication Cmp. Air Fermilab, February 15, 2016Slide# : 39

40. DAQ, CONTROLS AND CONTROL ROOM Fermilab, February 15, 2016Slide# : 40

41. Final operations before start cold commissioning Hardware for DAQ and for remote apparatus control (cryogenics, slow controls, etc.) will be procured and installed inside an appropriate space (control room). All connections with the Far Detector building will be done and tested. Software for slow control will be installed and tested. Fermilab, February 15, 2016Slide# : 41

42. Step 13 – Installation of electrical feedthroghs Requirements: All readiness reviews passed. All equipment ready and operational. Argon circuit under high vacuum. Start Cold Commissioning Detailed document in preparation Fermilab, February 15, 2016Slide# : 42

43. MUON TAGGER Fermilab, February 15, 2016Slide# : 43

44. Cosmic rays tagger installation The design of the warm vessel allows installation of the cosmic rays tagger bottom and lateral parts at any time after the warm vessel completion. The top part can be installed only when the cryogenics plant and readout electronics installation is complete. The baseline design of the cosmic rays tagger has to be completed. The procurement of the basic elements of the cosmic rays tagger will be procured (scintillators, optical fibers, SiPMs, on board electronics, mechanical components) and assembled. The CRT panels will be installed and cabled. R/O electronics has to be designed, procured, installed and connected, together with the required power supplies. All the systems have to be tested and commissioned. Fermilab, February 15, 2016Slide# : 44

45. Cold vessels Footh Fermilab, February 15, 2016Slide# : 45

46. Neoprene Joint Fermilab, February 15, 2016Slide# : 46

47. Cold shield panels Fermilab, February 15, 2016Slide# : 47