Type II/III Cables and PP1

1. Type II/III Cables and PP1 • Status & Plan A. Ciocio - SCTSG

2. Connector type II: JST SHDR-20V-S-B and FCI65239-002 Connector type III: CONEC 3017W5PBK99A1OX, 131C11019X, and 132J14019 Strip-Back Length A MPPBF1 (Type II) MPP2 (Type III) Splicing connection Foil Shield Strip-Back Length B Type II/III Cables • Double harness ordered from Ineo • Work on splicing started in August (Thurmelec) • Installation of connectors on the PP3 end at the factory • Need to provide exact length for both types and PP3 connectors • Two Contracts first to produce all the harnesses and then to install the connectors • Production of harness started – 175 double harnesses produced (for Barrel) doing Endcap now • Cables with PP3 connectors 3 weeks around – between December and March A. Ciocio - SCTSG

3. Cont’d • Testing • Use dummy PP1 with some load to test that the splice didn’t get damaged after installation • JST and FCI connectors very delicate – better to test at the PP3 end • Splice is verified at the company • Need QA going on regularly during production (Saverio D’Auria just joined) • Previous visits by Pepe B. Maarit W. and Laurent Gillain(CERN purchasing) quite satisfactory – mostly looking at the splicing • http://pcppe01.cern.ch:8081/jwhite/www/pics/Cable_Pics/2/ • Recent visit (Pepe, Maarit, Saverio) mostly on strip back length A. Ciocio - SCTSG

4. PP1 • Test of first 5 samples (double harness) show a problem with keeping JST and FCI connectors in place and lack of consistency in the difference between the 2 strips back lengths • Requirement of 2mm difference in strip back lengths of the power lines and thinner lines (JST – extra length – confirmed by David) • Pepe, Maarit and Saverio visited Thermelec last week and discussed this issue • Company agreed to respect a minimum and will try to keep it between 0 and 2mm for future production • Company will check lengths of current batch (rework =they throw the connector hood and recut the wires) • Guessing around 50% of the harnesses in the first batch have > 2 mm length difference (but it’s maller than the samples) • We’ll need to decide how to proceed and how many to have fixed • Need to understand margin in the length difference • There are also designs for Clips to keep the cables in place (Tony). Production of the mould started - finished by end of the year A. Ciocio - SCTSG

5. PP1 connection A. Ciocio - SCTSG

6. PP1(cont’d) • To be sure that the existing strip lengths are correct, we'd need to assemble two cables of each of the three strip lengths together with a real PPB1 and clamp • Find out about order of installation • Different strips back lengths harness brought back from company in last visit - we’ll try them A. Ciocio - SCTSG

7. Extra length in sector 9 • TC are asking us to make our type II cables longer in one sector (by 5 m), so that the thinner cables continue through a difficult region • Find limits on voltage drop that we can tolerate, translated into an upper limit on the length of type II (in progress Pippa Heinz et al) • see Pippa’s talk A. Ciocio - SCTSG

8. DPP1 in cryostat • checked the dummy PPB1 in the cryostat bore (with Andy) A. Ciocio - SCTSG

9. Plan • Provide lengths (done) and labels for harnesses for first batch of cables (for sector 5) so that the connectors can start to be placed (~200 cables) (soon we hope) • Work out lengths (and provide them) for future production • Connectors will be delivered end of November but we are hoping to get a small amount delivered sooner so that we can have the 200 mentioned above built. • Prepare for testing • Work on QA and clarify lengths of strip back with company A. Ciocio - SCTSG