Installation of the T600 at Fermilab CERN, November 17, 2016

Installation of components on the roof CERN, November 17, 2016

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. CERN, November 17, 2016

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. Chimneys LAr Filling line Internal cables LAr Distribution line Requirements to FNAL: cranes, crane drivers, mains, ventilation, heating. Manpower for operations on the detector: 4 mechanical technicians (2 CERN + 2 FNAL) + 1 supervisor Time: 7 days CERN, November 17, 2016

Internal vacuum tests Turbo pumps (2X) 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). Turbo pumps (2X) Roughing pumps (6x) Requirements to FNAL: mains, ventilation, heating, technicians for chimneys and flanges installation and sealing, helium, helium leak detectors, safety and support for tests. Manpower: 4 mechanical technicians (2 CERN + 2 FNAL) + 1 supervisor Time: 5 days for installation + 4 days for vacuum pumping and testing CERN, November 17, 2016

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. Thermal shield top Requirements to FNAL: cranes, crane drivers, mains, ventilation, heating, safety for tests. Manpower: Subcontracted (2 mechanics + 1 welder) + 1 supervisor Time: 3 days for installation + 2 days for test CERN, November 17, 2016

WARM vessels ROOF CERN, November 17, 2016

Step 13 – Installation of electrical feedthroghs Warm vessel roof preparation The warm vessel structure will be prepared at the ground level in 12 subcomponents. The thermal insulation will be installed on each subcomponent. Holes for the chimneys Thermal Insulation (glued and supported by rods) St. Steel external skin (welded) St. Steel structure (bolted) Subcomponents Requirements to FNAL: cranes, crane drivers, mains, ventilation, heating, crane. Manpower: 2 mechanical technicians (1 CERN + 1 FNAL) + 1 supervisor Time: 15 days CERN, November 17, 2016

Step 13 – Installation of electrical feedthroghs Warm vessel roof installation The warm vessel roof subcomponents will be put in position, bolted on the lower structure and welded to the lower structure and between them Bolted connections Continuous TIG weld Top warm vessel roof first sub-component Requirements to FNAL: cranes, crane drivers, mains, ventilation, heating, welders, TIG welding tool, fumes detectors. Manpower: 4 mechanical technicians (2 CERN + 2 INFN) + 2 welders (FNAL) + 2 supervisors. Time: 15 days CERN, November 17, 2016

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. Rubber Joints Requirements to FNAL: mains, ventilation, heating, helium, leak detector, safety for tests. Manpower: 2 mechanical technicians (1 CERN + 1 INFN) + 1 supervisor Time: 3 days CERN, November 17, 2016

on cryostat electronics installation CERN, November 17, 2016

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. External joints (crosses) Requirements to FNAL: mains, ventilation, heating, crane, crane drivers, support of technicians for mech. assemblies Manpower: external contractors for cryogenics + 4 mechanical technicians (2 INFN + 2 FNAL) + 2 supervisors Time: 3 days CERN, November 17, 2016

Step 13 – Installation of electrical feedthroghs Installation of feedthroghs and electronics baskets 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. Start tests on electronics noise, etc.. Partially occupied Requirements: mains, ventilation, heating, crane, crane drivers, support of technicians for mech. assemblies Manpower: 2 mechanical technicians (FNAL) + 2 electronics technicians (INFN) + 1 supervisor Time: 7 days CERN, November 17, 2016

Step 13 – Installation of electrical feedthroghs Installation of PWR and HV supplies and on detector electronics 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. Supply and R/O cables +optical fibers Requirements: mains, ventilation, heating. Manpower: 2 electronics technicians (1 FNAL + 1 INFN) 3 physicists (1 CERN + 1 FNAL + 1 INFN) + 2 supervisors Time: 20 days (in parallel with other activities) CERN, November 17, 2016

Warm and cold commissioning of the T600 at Fermilab CERN, December 8, 2016

Proximity cryogenics CERN, December 8, 2016

Step 13 – Installation of electrical feedthroghs Complete the argon circuit 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. LAr pump LAr Filters GAr Filters Requirements: mains, ventilation, heating, crane. Manpower: External contractor + 1 technician (FNAL) + 2 supervisors Time: 20 days CERN, December 8, 2016

Step 13 – Installation of electrical feedthroghs Pressure leak test (warm-commissioning – 1) 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. LAr pump LAr Filters GAr Filters Requirements: mains, ventilation, heating, oxygen deficiency sensors, argon gas (100 m3). Manpower: 1 technician (FNAL) + 2 supervisors Time: 7 days CERN, December 8, 2016

Step 13 – Installation of electrical feedthroghs Installation of vacuum pumps and gauges Vacuum pumps and gauges will be installed and tested Roughing pumps (5x) Roughing pumps (5x) Turbo pumps (4X) Turbo Pumps (4X) Requirements: mains, ventilation, heating, crane, compressed air. Manpower: 2 mechanical technicians (1 CERN + + FNAL) + 2 supervisors Time: 7 days CERN, December 8, 2016

Step 13 – Installation of electrical feedthroghs Vacuum and Helium leak tests (warm-commissioning-2) 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. Turbo pumps (4X) Turbo Pumps (4X) Roughing pumps (5x) Requirements: mains, ventilation, heating, compressed air, helium, helium leak detectors, safety for tests. Manpower: 1 technician (20%) + 2 supervisors Time: > 20 days CERN, December 8, 2016

Step 13 – Installation of electrical feedthroghs Complete the Nitrogen circuit All Nitrogen circuit will be installed, including pumps, valves and gauges and controls LAr pump LAr Filters GAr Filters LN2 pump Phase separator Requirements: mains, ventilation, heating, crane. Manpower: external contractor + 2 supervisors Time: 45 days CERN, December 8, 2016

Step 13 – Installation of electrical feedthroghs Connect the external cryogenics The external cryogenics equipment (storage dewars, transfer lines, controls) will be connected to the apparatus. LAr pump LAr Filters GAr Filters LN2 pump Phase separator LAr Storage Pre-Filter LN2 Storage Requirements: mains, ventilation, heating, crane. Manpower: 2 technicians (FNAL) + 2 supervisors Time: 7 days CERN, December 8, 2016

Step 13 – Installation of electrical feedthroghs Pressure test of the Nitrogen circuit Nitrogen circuits will tested according to the design maximum pressure. LAr pump LAr Filters GAr Filters LN2 pump Phase separator Requirements: mains, ventilation, heating, oxygen deficiency sensors, safety for tests, nitrogen gas (100 m3). Manpower: 1 technician (20% - FNAL) + 2 supervisors Time: 7 days CSN2, September 22, 2015 CERN, December 8, 2016 Slide: 23

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. CERN, December 8, 2016

COLD Commissioning CERN, December 8, 2016

Cold Commissioning Warm test of all cryogenic components and controls. Slow controls tests and data logging. Tests of network communications and alarms. Final safety inspection and clearance for start of the operations. Check of liquid argon supply. First supply delivered and local storage full. Break the vacuum inside the argon volumes and take the internal pressure to ≈ 0.15 bar relative with purified argon gas. The argon gas input line remains open and the pressure is regulated during the whole cooling process. Start cooling. Cool down to about 200 K (≈ 3 days). Continuously check the temperature gradients on the wire chambers. Stop cooling if needed to lower the temperature gradients. Start GAr recirculation and continue to cool down. Cool down to about 130 K (≈ 3 days). Continuously check the temperature gradients on the wire chambers. Stop cooling if needed to lower the temperature gradients. If needed, stabilize the gradients to ≤ 40 K. Start filling with LAr through the purifiers. CERN, December 8, 2016

Filling Internal temperature will rapidly go to ≈ 90 K. If needed, pressure will be controlled during the first phase of the filling by manually venting trough dedicated valves. Pressure in the LAr storage dewar has to be regulated to < 3 bar to minimize flash evaporation. Continuously fill at a rate of 1 m3 / module / hour. Progressively close the manual venting valves as the pressure and temperatures stabilize. Continuously check the quality of the argon after the filling filter. Stop the filling when the maximum level is reached. Stabilize the cooling circuit and the GAr recirculation circuits until the pressure is steadily around 0.15 bar and the temperature differences at the output of the cooling shield are within 1 K. This will require ≈ 10 days. Monitor the level. Start the drift field. Turn on the PMTs. Turn on the readout electronics. CERN, December 8, 2016