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SCT Cables and Patch Panels

Stay updated with the current status of Type IV cables production and testing, and learn about the installation process through this comprehensive guide. Find detailed updates on racks and patch panels, testing procedures, and upcoming work plans.

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SCT Cables and Patch Panels

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  1. SCT Cables andPatch Panels Type IV PP3 Type II-III and PP1 Testing & Installation Plan Workpackage https://edms.cern.ch/document/593278/ A.Ciocio - SCTSG

  2. Status of Type IV Cables • Cables production resumed in February after 3 months stop • See ID week February ‘06 • 220 doubles harnesses to complete production • Installation resumed last week • Racks in US side were installed last year • Only 2 PP3 racks (USA side) were previously completed • New team from TC to complete USA side • Connector in situ (CPE) • All cables in US15 installed and almost completed with connectors on the PS end • CPE went home on March 10 • Almost all racks are tested • Very good yield • Rack testing in progress • Work will be resumed in 2 weeks • Complete US side and start racks in USA15 Racks on Level 6 US side A.Ciocio - SCTSG

  3. PP3 • Testing • Burn-in of 90 units/day A.Ciocio - SCTSG

  4. PP3 Assembly & Installation • Assembly • 30 PP3 units are assembled in one subrack or special subracks • Insulating film applied on individual shield case • A few drops of silicone to hold them together • External clamp for rack mounting • Kapton tape strips to cover screw-heads • Extra kapton (or insulation film) inside the clamp • Subracks in the pit: 90 +1 special • Subracks on bench: 19 + 2 special • Installation • Dummy Patch Panels were used during installation of US side cables • Cables were tightened to horizontal bars to keep to the right position • Cables have to be removed from the current position and plugged in by groups/rows when the PP3 subracks are installed • USA racks will be equipped with PP3 subracks before installation of cables • Type IV or Type III plugged into PP3 is sequence with testing A.Ciocio - SCTSG

  5. PP3 Needs • We need more PP3's: 4261 PP3 units • 173 are spares • 139 empty shield cases • There are spares in the middle of the rack • to skip PS channels - interlock modularity • and usually in groups (4-8) at the top or the bottom • Often top or bottom subracks are not completely used and we should optimize that occupancy – with empty shield cases • A few subracks of one row of PP3 are necessary for the very full racks that don’t have spares already at the top or bottom http://www-atlas.lbl.gov/ciocio/SCTcables/Racks_Layout • Special 200 PP3s to go in the first rack where bigger connector hood were used • require more tolerance (shorter standoffs) for connector to fit • 241 PP3 boards not assembled into shielding boxes might be used for this purpose A.Ciocio - SCTSG

  6. Type II ServicesSequence • Sector 5 (top) and Sector 13 (bottom) • heater cables, and DCS cables (completed) • Sector 9 horizontal towards USA15 is currently being installed • SCT fibres • SCT power cables (384 Barrel and 494 Endcap cables + spares) • Barrel cables (side A and C) started 1 month ago • Sector 3 next followed by • Sector 1, 7, 11, 15 • Sequence in a sector is: • Tubes, fibres, heater cables, SCT cables, (Muon chambers), • TRT cables, pixel cables A.Ciocio - SCTSG

  7. Type II/III & PP1 – Parts Status • INEO/Thurmelec are making double length harnesses with type II cable and type III spliced, and type II FCI/JST connectors on both ends as they receive information about the lengths • Single length cables with FCT connector (PP3) are produced when length finalized with test cable measurement from cryostat to PP3 racks sector by sector • Cables for Sector 9 • 288 Barrel + 96 EC cables received • 96 Barrel + 247 EC + 155 EC this week • Cables for Sector 3 • Cables paths measured and single length cables ordered • expected in 2 weeks • Labels printed and sent to company • Mapping defined – drawings for installation are made • Mapping for PP1 connectivity transferred to Nicolas/Sigi • Rate of future deliveries (after April 14): 400 cables/week • PPB1 – clamps, clips, cable tray covers are late but coming next week • PPF1 – most parts available • Parts to improve connection of drain wire and foil to clamp on order A.Ciocio - SCTSG

  8. Type II/III cables – Installation • 288 Barrel cables installed • almost all tested. • So far all OK • Problem with testing related to the grounding. • If DPP1 is attached to the cryostat is at the same potential as the cryostat Interference due to large capacitance. • Quick check by modifying one dPPB1 (removed large caps HVret-DPPB1 ground) to verify that • Then upgrade of software with loosen up cuts for HVret line - it works now! A.Ciocio - SCTSG

  9. Type II/III & PP1 – Installation BARREL • Mechanical problems to fit layers of 6 cables between clamp holder pins • The lower 6 cables tend to pop up out of the clamp holder after being pressed in • They need vigorous shaping to fit between the guide posts that are before the clamp (from 5.5 mm squeezed down to 4.8 mm) • The 2.5 mm high bridge clamp had to be removed just to get the top layer of cables to fit under the clamp • Will add metal braid for a reliable connection of the foil to the clamp by the top layer A.Ciocio - SCTSG

  10. Type II/III cables – Installation A.Ciocio - SCTSG

  11. Type II/III & PP1 – Installation ENDCAP • Installation of first cables in sector 9 is starting this week • Prototypes to understand how to insert drain wires in the clamp holes • 5 holes/17 wires • Group 4-5 drain wires crimp them in a ferrule and catch the ferrule with the grub screws • Add redundancy to improve high frequency EMI attenuation A.Ciocio - SCTSG

  12. ID Heater Cable Production and Installation Cryostat Cables Only • Total Cables Installed = 56 + 115 + 82 = 253 • Cables Tested = 56 + 115 = 171 A.Ciocio - SCTSG

  13. SCT DCS Cables • 128 type II and 40 type IV • All cables for the barrel are in the pit • 12 cables on sector 5 and 12 cables on sector 13 are installed and tested • 3 cables in sector 5 were damaged during installation (caught on sharp edge of cable tray) – repaired • 24 Cables in sector 9 installed and tested successfully • 20 cables to be installed in sector 3 are ready but installation should occur in 2 weeks (drawings in preparation) A.Ciocio - SCTSG

  14. Installation & Testing Activities • Type IV • Acceptance test • Test in rack after installation • Test of cut cables after connector in situ work • Plug-in cables into PS crates – test with feedtrough • Type II-III • Acceptance test (partial) • Organize boxes with right cables to send following installation sequence • Mount dPPB1 and dPPF1 • For Barrel: • Folding the shield and cut it the right amount, fix it • Squeezing the cables to fit between pin and clamp holder • Plug-in of the delicate JST/FCI connectors to dPPB1 • Placing the clamp, placing the clip • For Endcap: • Prepare drain wires before installation and during installation in the clamp • Plug in the dPPF1 • Test all cables installed in synch with installation (layer by layer) • PP3 • Burn-in of units • Assembly into subracks • Installation into racks of subracks • Plug-in the cables to PP3 • Final test of whole chain A.Ciocio - SCTSG

  15. Schedule • Type II-III installation as indicated by TC (Marzio) by mid-June • Type IV installation end of May • Connector in situ/testing mid-June/end of June • PS crates mid-June • PP3 assembly, installation end of April • All cables plugged into PP3 end of June • To meet this schedule we need more people present at CERN • Critical area in the type II-III acceptance installation and testing • Need two technical people to work in the cryostat available all the time • In general I need one person to add to each major activity • SCT participation very valuable to add to people who are resident A.Ciocio - SCTSG

  16. SCT Cable Shifts A.Ciocio - SCTSG

  17. What to do • http://www.hep.phy.cam.ac.uk/si-bin/sctworkplanner.cgi To sign up for shifts (and contact me because of unexpected changing in rate delivery/testing problems) • Safety courses: 1) basic safety training course (level 1-2-3 video in B55) http://safety-commission.web.cern.ch/safety-commission/SC-site/sc_pages/training/basic.html 2) Level 4 for working in US15 + Oxybox (we have them) If you have an AIS LOGIN (used for EDH documents), you can follow the course from anywhere (even outside CERN) with AIS login by accessing http://sir.cern.ch. If you have no AIS LOGIN, you need to register at the following address level4.training@cern.ch 3) Level 4A mandatory to enter the ATLAS underground areas This course is composed of 4 modules : Cryogeny, Evacuation, Installation and Magnet. Each of these modules is followed by a small test which you have to take and pass. If you do not yet have an AIS login, please contact the ATLAS secretariat and ask for this AIS account (they must be registered with ATLAS). If this is not possible, we will organise special training at CERN. 4) make the access request on EDH 5) get your safety boots & helmet (or borrow them) TRY TO GET AS MUCH AS POSSIBLE DONE BEFORE COMING TO CERN… A.Ciocio - SCTSG

  18. LINKS Summary • SCT Cables Web page http://www-atlas.lbl.gov/ciocio/SCTcables/ • Mapping, technical appendices, cables related documents https://edms.cern.ch/document/624679/1 • Shifts Shift planner (developed by D. Robinson) works very well for planning the activities and have people to sign up http://www.hep.phy.cam.ac.uk/si-bin/sctworkplanner.cgi • Safety courses Level 1-2-3 basic course for access underground and point 1 http://safety-commission.web.cern.ch/safety-commission/SC-site/sc_pages/training/basic.html Level 4: with AIS login http://sir.cern.ch. Level 4A: AIS login • Overall Safety and Health Procedure Document PPSPS • https://edms.cern.ch/document/593278/ • Rack Wizard • http://atlas.web.cern.ch/Atlas/TCOORD/Activities/Installation/Database/rack.htm ID installation • Tuesday mornings, CRM (control room management) meetings https://edms.cern.ch/document/526887/1 • Wednesday mornings ID/TC installation meeting https://edms.cern.ch/document/462288/1 A.Ciocio - SCTSG

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