11 T dipole titanium pole wedges removable poles

11 T dipole titanium pole wedges (removable poles) D. Pulikowski, L. Rudeiros Fernandez, F. Savary logo area 2020. 10. 30 - 30/7 -018 - Kjell Johnsen Auditorium - https: //indico. cern. ch/event/964383/ On design, fabrication and metrology of the 11 T dipole removable poles

Outlook § § § Reminder on collaring Issue during alignment process for CC 11 Resolution of the issue First extended metrology How to proceed logo area F. Savary – 11 T dipole titanium pole wedges 2

Reminder on collaring logo area Col lar Pole An assembly excess is created in the azimuthal direction in order to provide pre-stress to the coil, while not exceeding the maximum stress allowable. Given the geometrical variability of the coils’ cross sections along their length, a graded shim is used Coil F. Savary – 11 T dipole titanium pole wedges 3

Reminder on collaring Right Gap Left CS § § Stopper height: 69. 85 mm for collaring with NO Gap NCS The collaring tool provides additional support in the form of increased stopper height within the heads region in order to prevent excessive stress The top-shim between the collar nose and the pole decreases towards the coil’s head logo area F. Savary – 11 T dipole titanium pole wedges 4

Reminder on collaring Strain gauge data Courtesy M. Guinchard et al. logo area F. Savary – 11 T dipole titanium pole wedges 5

Alignment - Stoppers of 70. 05 mm (69. 85 + 0. 20 mm thick shims) Detection of the issue Gap 0. 2 mm thick shim logo area F. Savary – 11 T dipole titanium pole wedges 6

Resolution and results of first extended metrology Successive repeats of collaring operation CC 11 Detection of an issue during collaring Correction actions and corroboration during 2 nd attempt Correction actions for 3 rd collaring The deviations shown on the plot opposite could explain the difficulties encountered during the collaring of CC 11. The kit K 11 used for CC 11 comes from the same period of production as kit 10, which has been measured and logodeviations shows larger area Exhaustive metrology control Deviation w. r. t. nominal geometry, all the parts of the 2 kits have been measured Deviation of the top plane of the pole 200 Deviation (μm) Pole shim reduced by 50 �� m 1. 2. 3. First extended metrology of Ti pole pieces Metrology data – Courtesy B. Bulat K 10 Max section 100 0 Tolerance -100 0 200 400 600 Sequencial production number F. Savary – 11 T dipole titanium pole wedges 800 7

How to proceed § Measure all the pole wedges of the next kits § Sort wedges in order to minimize variations within a kit § Correct, if needed, by reducing the thickness of the top shims, which are installed between the collar nose and the pole wedge (see item 6 of the exploded view opposite, thickness 0. 2 mm) § A graded shim can be applied (i. e. of different thickness along the assembly), in case the parts of a given kit require different correction logo area F. Savary – 11 T dipole titanium pole wedges 8

Thank you for your attention logo area F. Savary – 11 T dipole titanium pole wedges 9

Background on procurement § DO-30755/TE/HL-LHC, then DO-31011 (shape tolerance changed from 0. 20 to 0. 02 mm in Rev. B of dwg. on 2017 -09 -19, and version for production in Rev. E of dwg. dated 2017 -11 -29 as shown on slide 3 + acceptance criteria for inner/outer diameters as shown on slide 4) § Technical specification (updated for DO-31011) EDMS 1854775 § Procurement by the service sous-traitance EN-MME, technical responsible Alessandro Dallocchio Technical responsible on the TE-MSC side, C. Löffler (Tech. 1) and F. Savary (Tech. 2) Price enquiry sent out on 2017 -10 -16 Opening of offers from bidders on 2017 -10 -23 Job EDH 7044432 § § § Communication from IPT, J. Pierlot, on 2017 -10 -04 asking to change the DO number § § Green light from specification committee (B. Nicquevert) on 2017 -10 -13 Drawing LHCMBH_C 0054 § § § EDH process initiated on 28. 11. 2017 Estimated cost 280 k. CHF + 2. 50 k. CHF (transport) + 3. 50 k. CHF (metrology) + 5. 63 k. CHF (admin. fees) Supplier KUSTERS BOSCH FMI BV – NL (the firm Gozukucuk Makine San TIC LTD STI in Turkey – lowest bid – was discarded following unsuccessful manufacturing trials) Order CD 7044118 dated 2017 -12 -01, sent out to the supplier on 2017 -12 -04, amount 230 k€ Number of parts: 704 of 240 mm length, and 32 of 87. 5 mm length More details at https: //edms 5. cern. ch/jmt-job/J 3044698 § § § logo area F. Savary – 11 T dipole titanium pole wedges 10

logo area F. Savary – 11 T dipole titanium pole wedges 11

logo area F. Savary – 11 T dipole titanium pole wedges 12