F. Bertinelli, presentation 25-May-09 - CERN TE-MSC-CMI

Tunnel News 3-4 Week 21/2009Courtesy J.P. Tock25 May, 2009 MMM and TEMB - Francesco Bertinelli 2

Tunnel News 3-4 D-area• Some milestones:• Finished welding first jumper lines Q23R3• All line-N cabling finished• MPAQ successful last Friday !!! ELQA OK to close 19R3• Coactivity impact with cabling minimised: no IC work in D-area next Friday• ELQA under pressure this week: AIV2 tests, L4 MPAQ (nextWednesday), MHVQN next Thursday possible depending onELQA• need to make progress with other jumpers (weld M3, then k,then vacuum testing before welding jumper lines can start).25 May, 2009 MMM and TEMB - Francesco Bertinelli 3

6-7 endoscopy• Long and short plastic shimmings, RF fingers, coloured areas ...• sometimes removal is successful, sometimes not ...• V1: 1321m, 47.1% of total arc lengthV2: 968m, 34.5% of total arc length... and continues (until reach limit of endoscopy from a hole)• 21 PIMs cut so far !Courtesy P. Borowiec25 May, 2009 MMM and TEMB - Francesco Bertinelli 5

80K radiation/thermal screens• Damage occured at both cool-downand warm-up‣ Improve assembly procedure ofscreens‣ Improve uniformity of temperatureduring cool-down operation, impact+1 dayCourtesy G. Ferlin, S. Claudet, J.P. Tock25 May, 2009 MMM and TEMB - Francesco Bertinelli 6

1-2 M3 splice resistance (copper)(B29-A30)R1 +45μΩR16→+44μΩ(22.8μΩ, 28.5μΩ, 29.9μΩ)(B32-A33)R1 +39μΩR16→+53μΩ(52.3μΩ, 24.9μΩ, 10.8μΩ)(A18-B17)L2 +35μΩR16→+…μΩ(…μΩ, …μΩ, …μΩ)Courtesy R. Flora, C. Scheuerlein(C30-A30)L2 +36μΩR16→+29μΩ(41.3μΩ, 12.3μΩ)(C17-A17)L2 +36μΩR16→+42μΩ(39.6μΩ, 26.6μΩ)25 May, 2009 MMM and TEMB - Francesco Bertinelli 7

Impact on W closing and VACSEC testing• 1-2: IC closed >90%, 3/14 VACSECstesting• 5-6: IC closed >90%, 12/14 VACSECstested but some reopened• 6-7: IC closed >75%, 2/14 VACSECstested• 3-4: IC closed >15%, now closing inL4, no VACSECs tested• W Teams working on reopenings(for R16 and for plastic shimmings in6-7) and thermal screen repairsCourtesy A. Grimaud, P. Cruikshank, J.P. Tock25 May, 2009 MMM and TEMB - Francesco Bertinelli 8

5-6 M3 R16 vs quench data2QuenchPropagationto A19R57.5 kA after 39s1QuenchB19R5at 11.1 kA3QuenchPropagationto C19R57.4 kA after 40s10.4μΩ10.4μΩ10.5μΩ11.0μΩ10.1μΩ10.1μΩ10.6μΩ10.2μΩ10.9μΩ10.7μΩ12.5μΩ10.6μΩ25 May, 2009 MMM and TEMB - Francesco Bertinelli 10

25 May, 2009 MMM and TEMB - Francesco Bertinelli 12

Pressure relief nozzles• TE: need for a common approach to He deflectionoutside pressure relief nozzles (SAM, triplets, DFBs)25 May, 2009 MMM and TEMB - Francesco Bertinelli 13

Where do we stop cutting?Courtesy R. FloraOKOKOKFalse alarmOpen WOpen WOKOpen WOKOKOKOpen 2 additional IC (1 free)OK, came free3 additional IC?Open W, comes free3 additional IC?• Remember we are onlydealing with warm M3 so far...• need to start repairs now(after 3-4)• for a proper job needportable milling machine, sowork sequentially (1-2, 5-6,6-7)• Open&cut down to 35 μΩ(with some common senseexceptions below…), repairwhen R16>20μΩ25 May, 2009 MMM and TEMB - Francesco Bertinelli 14

3-4 M3 splice resistance (copper)BB clamped!(C25-A25)L4 +35μΩR16→+40μΩ(52μΩ, 12μΩ)New splices vs old splicesCourtesy R. Flora25 May, 2009 MMM and TEMB - Francesco Bertinelli 15

(C16-B17)R6 +50μΩR16→+…μΩ(…μΩ, 10.6μΩ, 26.5μΩ)(B16-A17)R6 +34μΩR16→+…μΩ(51.6μΩ, …μΩ, 10.9μΩ)6-7 M3 splice resistance (copper)B34R6-C34L7 +39μΩR16→μΩ(…μΩ, …μΩ, …μΩ)(B33-C32)L7 +42μΩR16→+…μΩ(…μΩ, …μΩ, …μΩ)(B32-C31)L7 +42μΩR16→+…μΩ(…μΩ, …μΩ, …μΩ)Courtesy R. Flora(A16-C16)R6 +60μΩR16→+67μΩ(60.3μΩ, 31.7μΩ)(C15-B16)R6 -3μΩR16→+0μΩ(13.0μΩ, 10.4μΩ, 11.6μΩ)(A33-C32)L7 -1μΩR16→+…μΩ(…μΩ, …μΩ, …μΩ)(C32-A32)L7 +31.5μΩR16→+…μΩ(…μΩ, …μΩ, …μΩ)25 May, 2009 MMM and TEMB - Francesco Bertinelli 16

13kA splices120 mm5 mm160 mm150 mm25 May, 2009 MMM and TEMB - Francesco Bertinelli 17

Sector 4-5MBA.(B16-C15)L579 °K25 May, 2009 MMM and TEMB - Francesco Bertinelli 18

13kA splicesQEBI.11L4 M1 cryolineNo mechanical contactQBQI.32R1 M3 corridorNo mechanical contactQBBI.A25L4 M3 cryolineNo mechanical contact25 May, 2009 MMM and TEMB - Francesco Bertinelli 19

QBQI.32R1-M36.7 μΩ12.5 μΩ6.6 μΩlyra QBQI.32R1-M3-cryoline connection47.4 μΩNo mechanical contact at lyra sideBrased by Soste, 24 May 200752.3 μΩ5.9 μΩCourtesy C. Scheuerlein25 May, 2009 MMM and TEMB - Francesco Bertinelli 20

Gamma rays QBQI.32R1-M3QBQI-32R1-M3-CRY-cCQBQI-32R1-M3-CRY-cLQBQI-32R1-M3-COR-cL- 47.4 μΩQBQI-32R1-M3-COR-cCCourtesy C. Scheuerlein25 May, 2009 MMM and TEMB - Francesco Bertinelli 21

QBBI.A25L4-M3No copper connection, canmove up and down slightly52.0 μΩ36.1 μΩ 17.8 μΩlyraQBBI.A25L4-M3-cryoline connectionBrased by Cescutti/Lepaih on16.4 μΩ5.6 μΩ22.1 μΩ25/10/2006 (total 3 IC for the day) Courtesy C. ScheuerleinC.S., 20.5.0925 May, 2009 MMM and TEMB - Francesco Bertinelli 22

Gamma rays QBBI.A25L4-M3QBBI-A25L4-M3-CRY-cC-17.8 μΩQBBI-A25L4-M3-CRY-cL-36.1 μΩQBBI-A25L4-M3-COR-cL-16.4 μΩQBBI-A25L4-M3-COR-cCC.S., 20.5.09Courtesy C. Scheuerlein25 May, 2009 MMM and TEMB - Francesco Bertinelli 23

Estimation of isolated cable length inQBBI.A25L4-M3-cryoline-lyra side (+30 μΩ)31 mm16 mmSn foilCourtesy C. Scheuerlein25 May, 2009 MMM and TEMB - Francesco Bertinelli 24

QBBI.A25L4-M3-cryoline Cu profilesC.S., 20.5.0925 May, 2009 MMM and TEMB - Francesco Bertinelli 25

US test QBBI.A25L4-M3-cryoline100QBBI.A25L4-M3-cryoline far leftAcceptance threshold value100QBBI.A25L4-M3-cryoline center leftAcceptance threshold value100QBBI.A25L4-M3-cryoline-center-rightAcceptance threshold value100QBBI.A25L4-M3-cryoline-far-rightAcceptance threshold valueUS transmission (a.u.)80604020US transmission (a.u.)80604020US transmission (a.u.)80604020US transmission (a.u.)806040200time (a.u.)0time (a.u.)0time (a.u.)0time (a.u.)C.S., 20.5.0925 May, 2009 MMM and TEMB - Francesco Bertinelli 26