CERN/CEA Collaboration agreement No. KE2275/TE WP5 – HTS insert Meeting 04/09/2015

Content Insert design Detailed design status Magnet fabrication status Summary and Next steps Milestones 04/09/2015 CA No. KE2275/TE - WP5 - HTS Insert 2

New Insert Design (2014) B0 = 5.4 T Je= 250 A/mm2 Bpeak= 5,87 T Inom = 2760 A Insert Design CA No. KE2275/TE - WP5 - HTS Insert 04/09/ double layers coils Layer 1/1bis : 33 turns Layer 2 : 26 turns Layer 3 : 11 turns External tube, 5.5 mm thick Nitronic parts, 100 mm long - Thermal shrinkage - TIG welding External pads, 316L mm long parts 2 50-mm long parts Iron pole Compression plates, 316L Glass epoxy inter-coil and external insulation No more welded 3 Layer 1 Layer 2 Layer 3

Insert Design Mechanical Structure Phase I, stand-alone mode : we will use a demountable mechanical structure (assembly less risky and faster, possibility to adjust the pre-stress, possibility to quickly and easily open the magnet) Phase 2, insert mode in Fresca 2 : demountable structure replaced by the 5.5 mm thick tube (heat-shrink method) 04/09/2015 Phase 1Phase 2 CA No. KE2275/TE - WP5 - HTS Insert 4 ø 99 mm 130 mm CA No. KE2275/TE - WP5 - HTS Insert 04/09/ mm

Insert Design Impact of persistent currents (B ⊥ and B // ) and of imbalanced currents on the central field have been computed. Results have been used to position hall probs. 04/09/2015 CA No. KE2275/TE - WP5 - HTS Insert 5 04/09/2015 Persistant Inter-filament max B y = +25 mT 5-25 seconds Imbalanced max B x = 20 mT max ΔB y = 36 mT time = long Persistant due to perp field max B y = mT time = long

800 mm Magnet detailed design status CAD detailed design of the insert completed Mandrel ends have been modified to optimize layer transition End saddles designed taking into account new coil dimensions Mechanical structure for standalone tests Coil handling tooling (for magnet assembly) Interface with the test station to be designed CA No. KE2275/TE - WP5 - HTS Insert 04/09/ CA No. KE2275/TE - WP5 - HTS Insert 04/09/ mm

Magnet components procurement Cable HTS tape: 2 unit lengths (UL) of 40 m received November unit lengths of 40 m received April units lengths of 110 m received April 2015 CuBe2 Stabliizer: 1.2 km of CuBe2 tape procured by LNCMI during EuCARD program 880 m annealed at CEA (3h at 300 °C in Argon). First insulation realized by HPFoil in February 2015 unsatisfactory, too large New insulation ongoing Dummy SS tape procured CA No. KE2275/TE - WP5 - HTS Insert 04/09/2015 7

Magnet component procurement CA No. KE2275/TE - WP5 - HTS Insert 04/09/ Row Material Fabrication status Procured byDelivery Pole piecesProcuredCompletedCEADelivered End saddleProcuredCompletedCERNDelivered 50 mm long PadsProcuredCompletedLNCMIOn going 100 mm long PadsProcuredOn goingCERN- Coil Insulation (G10)ProcuredCompletedCERNDelivered Stand-alone structureProcuredCompletedCERNDelivered External tubeProcuredCompletedCEA/CERNDelivered  All the parts needed to build the coils are at CEA.  All the other magnet components (mechanical structure, end-shoes, end caps, …) have been ordered by CERN and delivered this summer. CA No. KE2275/TE - WP5 - HTS Insert 04/09/2015

Magnet fabrication Winding tooling Winding tooling has been modified 6 magnetic breaks delivered and validated Tape supports and guides during winding delivered and validated 12 winding reels for the 6 tapes delivered CA No. KE2275/TE - WP5 - HTS Insert 04/09/2015 9

Magnet fabrication Dummy coils 3 dummy coils has been wound to validate winding tooling and fabrication processes CA No. KE2275/TE - WP5 - HTS Insert 04/09/

Magnet fabrication Dummy mechanical assembly ongoing Coils assembly with insulation sheets and end parts Assembly of the pads Assembly of the mechanical structure CA No. KE2275/TE - WP5 - HTS Insert 04/09/

Next steps Assembly tools are under validation, waiting for pads It will be completed by end of September Winding of HTS coils will start in October 2015, followed by insert assembly For stand-alone tests at Saclay we need to: Modify existing 3 kA current leads Add an extension to the cryostat CA No. KE2275/TE - WP5 - HTS Insert 04/09/

Milestones * Depending on FRESCA2 activities at Saclay **depending of FRESCA2 schedule N°DescriptionKick off meeting04/09/ Test of the prototype at LNCMISeptember 2013 Test of a second prototype at LNCMIMarch 2015No more foreseen 5.2Construction of the insertJune 2015November 2015* 5.3Test report of the insert inside FRESCA2 September 2016*September 2016** 04/09/2015 CA No. KE2275/TE - WP5 - HTS Insert 13