MBHSP 107 COLLARING N Bourcey S Izquierdo Bermudez

MBHSP 107 - COLLARING N. Bourcey, S. Izquierdo Bermudez, P. Ferracin, M. Daly, H. Dupont, N. Eyraud, S. Ferradas, P. Grosclaude, C. Loffler, J. C. Perez, F. Savary, G. Vallone CERN logo area 11 T Dipole Task Force Meeting 27 June 2018 CERN

Shimming plan § Input from the collaring mock-up test campaign: the peak excess must not exceed 300 μm § We consider possible steps of 50 μm in the shimming. § Shimming plan first proposal: § Average left/right peak excess: 297 μm § Maximum peak excess: 312 μm § Shimming plan second proposal: § Average left/right peak excess: 247 μm § Maximum peak excess: 262 μm logo area 2

Shimming plan § Dissymmetry left/right § Different shims left/right Courtesy S. Ferradas logo area 3

Excess w. r. t to previous collared coil Courtesy C. Loffler logo area 4

Excess logo area To edit speaker name go to Insert > Header & Footer and apply to all slides except title page 5

Collars instrumentation § 5 cross sections instrumented logo area 6

Collaring tool 6 LVDT sensors to monitor the displacement Stoppers thickness Shim logo area 7

Collaring procedure § § § § § The procedure is based n the one used for SP 106 and applied to the 150 mm mock-up. It has been adapted to fit the constraint of the prototype tooling. STEP 1: Stoppers 70. 70 mm (shim 1 mm) Press 50 bars (4. 2 MN) “ 0” LVDT Relax STEP 2: Stoppers 70 mm (shim 0. 3 mm) Press 50 bars (4. 2 MN) Increase pressure by steps to reach the contact on the stoppers (contact is defined by the measure of the LVDT) Relax STEP 3: Stoppers 69. 85 mm (shim 0. 15 mm) Press 50 bars (4. 2 MN) Increase pressure by steps until the keys go in. Relax logo area 8

Results CCS (excess 240 μm) Large difference between collars in the same cross-section… For SP 108, CMM of the collars and calibration in the mock-up with dummy coils to understand what part of this difference is due to the collars and to the coil. Average 160 MPa Courtesy of P. Grosclaude logo area 9

Results Middle (excess 200 μm) Average 150 MPa Courtesy of P. Grosclaude logo area 10

Results NCS (excess 180 μm) Average 140 MPa Courtesy of P. Grosclaude logo area 11

Collaring force § Results of the collaring mock-up with 118: § Excess 200 μm – Force 420 KN § Excess 250 μm – Force 470 KN § SP 107: § Collaring force: 10. 5 MN (790 KN for 150 mm!) § Stopper size: 69. 85 mm (clearance 150 μm) To be consistent with the mock-up, we should have 40% of the force going in the tooling… (analysis on-going) logo area To edit speaker name go to Insert > Header & Footer and apply to all slides except title page 12

Displacement § § With the minimum force applied with the press (4. 2 MN), the right side of the collaring tool is already in contact. This is due to the non-parallelism of the press already observed on SP 106. Then the force is gradually increased until both sides of the tooling are in contact but a certain amount of force is lost in the tooling. logo area Courtesy of P. Grosclaude 13

Thank you. logo area 14