CISC meeting 13/02/2019 Interface between CISC and Detector Facilities A. Cervera S. Gollapinni
Contents of interface document • Introduction • Detector Integration • DUNE Detector Infrastructure • Detector Support Structures (DSS) • Connection to cryostat penetrations • Racks and Cable Trays • Internal Cryogenic Piping • Detector Safety System • Facilities (LBNF) interfaces • Conventional Facilities • Cryostat • Cryogenic Systems 2 Anselmo Cervera Villanueva, IFIC (UV-CSIC)—Valencia
General comments • We need to be more specific • Adding more info in some cases • Adding a link to another DocDB document in other cases 3 Anselmo Cervera Villanueva, IFIC (UV-CSIC)—Valencia
DSS • CISC will use DSS ports (the ports will be equipped with a CF63 side flange) as needed to route cables for Static T- gradient monitors, Individual sensors and cameras. The distribution of those systems is yet to be finalized and hence the optimal cable routing is not yet decided. The choice of DSS ports to be used and the exact cable path should be a combined decision between CISC and the DUNE Technical Coordination. CISC will purchase the flanges. • DSS I-bins can be used to route cables from instrumentation devices (e.g. individual temperature sensors) to cryostat (DSS and non-DSS) ports. • There are cable trays on the APAs that we can use • Grounding and shielding requirements on connections to DSS : all cable shields should be insulated from one another and any extra ground connections. The cable shield grounding should be configured flexibly. 4 Anselmo Cervera Villanueva, IFIC (UV-CSIC)—Valencia
Connection to cryostat penetrations • non-DSS ports, and in particular ports used by the cryogenic pipes (the ports will be equipped with a CF63 side flange), will be used to route cables from Static T-gradient monitors, individual temperature sensors, cold cameras and light emitting system. The distribution of sensors/ cameras/lights and their optimal cable routing is not yet decided. The choice of ports to be used and the exact cable path should be a combined decision between CISC and the DUNE Technical Coordination. CISC will purchase the flanges. • not obvious this is needed. DSS ports are probably su ffi cient • Cables from the instrumentation devices to the cryostat ports are: • There will be a four wires (2 twisted pair) shielded cable for each temperature sensor. The cable used for ProtoDUNE-SP has 3.5 mm diameter. Assuming 500 temperature sensors per detector, distributed in 24 sensors per port (4 SUB-25 connectors), the cable bundle for each port will have a diameter of 20 mm • Cable requirements and specifications for purity monitors is still being understood and will be included in a future draft. • Cable requirements and specifications for camera systems is still being understood and will be included in a future draft. • Cable requirements and specifications for light emitting system for cameras is still being understood and will be included in a future draft. • Cables from the several instrumentation devices inside the cryostat will have to be routed towards the corresponding port. Several mechanical structures are under consideration: cable trays could be attached to bolts in the detector corners (joints between two walls, including floor and roof), or those bolts could be used directly attaching the appropriate individual supports (rings, etc.). • There are cable trays on the APAs that we could use. Not obvious there is space for instrumentation cables • Each purity monitor assembly will require a space of 1 m 2 on top of the selected port (light source and Front-end amplifier). Dynamic T-gradient monitors will need an horizontal space of 1 m 2 on top of the selected ports (motor, …), and a vertical space of at least 3.5 m (more will simplify the installation). Inspection cameras will need a space of 1.5(vertical)x2x1.5 m3 on top of the selected ports if the glove box design is used (https:// arxiv.org/pdf/0903.0441.pdf, page 5), and 2.5 (vertical) x 0.5 x 0.5 for the periscope version. • Purity Monitors, dynamic T-gradient monitors and inspection cameras need some vertical space above the cryostat. CISC should ensure that in the case any of these devices are installed below the mezzanine the required vertical space is sufficient; otherwise, ports outside the mezzanine should be chosen. Need to be clarified. Precise location, clearance needed, etc 5 Anselmo Cervera Villanueva, IFIC (UV-CSIC)—Valencia
Racks on top of cryostat • Detector electrical infrastructure required to be housed in racks located on top of the cryostat are (need list of items that need to go within each rack, the rack space requirements for needed power supplies and crates, etc.): • On the Slow Controls side, • a 1U Slow Controls box that will be used to monitor rack parameters such as rack fans, air temperatures, status of the rack protection system, and thermal interlocks with power supplies etc. will be installed in every rack. The power to this unit will be derived from the common rack AC power; no specific power requirements are needed. IT IS 2U IN THE CISC/DAQ INTERFACE DOC . • CISC will require sub-systems to be monitored to be on network and as such a network box with several Ethernet switches will be required in each rack to network devices including the 1U rack monitoring box mentioned above and Slow Controls servers. The network box is expected to be attached to the inside side wall of the rack (as done in MicroBooNE) and is not expected to take any significant rack space. • On the Cryogenic Instrumentation side, • Rack space will be required to house power supplies for instrumentation systems (e.g. HV power supply for purity monitors) that require power. Some of these systems will require crates and cooling may be needed using external fans. The Consortium is working on finalizing these details and plans to include them in a future iteration of this document. • Missing instrumentation readout ??? Does it belong here ? • CISC will monitor (and in some cases control) all rack parameters such as rack fan speeds, air temperatures, power supply thermal interlock status bits, rack protection system status bit and all device interlock status bits that are housed in a given rack. 6 Anselmo Cervera Villanueva, IFIC (UV-CSIC)—Valencia
Cables outside cryostat • The cables from the flanges to the racks are (need number of cables, cable sizes, special routing requirements, etc.): • Cables from temperature sensors: ProtoDUNE-SP is using CERN standard MCA 26 13 twisted pair shielded cable, with a diameter of 10 mm for 6 sensors. It is not yet decided whether those cables will be used in DUNE. • Cable requirements and specifications for purity monitors is still being understood and will be included in a future draft. • Cable requirements and specifications for camera systems is still being understood and will be included in a future draft. • Cable requirements and specifications for light emitting system for cameras is still being understood and will be included in a future draft. • The cables going from the racks to other locations both on and off the detector are (need number of cables, cable sizes, cable end locations, special routing requirements, etc.): more details needed • Like all other devices, standard cabling will be required that will go from racks to instrumentation devices from the corresponding hardware (e.g. power supply) housed in the rack. • Network connections (optical fibers) going from each rack on the cryostat to the network rack in the DAQ room; this is a common need and is expected to fall under the scope of facility. • All instrumentation devices will be on detector ground . All cables will be EMF shielded with the shield connected to the readout system on the racks and the edge on the flange will be left floating. Not true, what about inline PrMs and gas analysers ? • Grounding and shielding requirements for cables attached at racks: For "readout" cables (e.g. purity monitors), they should also be shielded and grounded near the point of readout in the racks. Fiber connections do not use electrical shielding for signal integrity, but if they have metallic shielding for protection, the shielding should be connected to ground, preferably at the racks. 7 Anselmo Cervera Villanueva, IFIC (UV-CSIC)—Valencia
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