E. Cavanna, N. Bourcey, P. Ferracin, S. Izquierdo Bermudez, J. Mazet, J. C. Perez, F.O Pincot, X. Sarasola

E. Cavanna, N. Bourcey, P. Ferracin, S. Izquierdo Bermudez, J. Mazet, J. C. Perez, F-O. Pincot X. Sarasola Outline 2 Coil NameDescriptionStatus MQXF-001First Practice (Cu)Post Impregnation MQXF-101Second Practice (Nb3Sn – Low grade)Measurements post-impregnation MQXF-102First Coil (Nb3Sn)Impregnation MQXF-103Nb3SnHeat treatment 1.Status 2.Traces for LARP 3.Pole gaps

E. Cavanna, N. Bourcey, P. Ferracin, S. Izquierdo Bermudez, J. Mazet, J. C. Perez, F-O. Pincot X. Sarasola Coil 001 Post impregnation operations ongoing. 3 A new tool for the impregnation of the ends (inner layer) has been machined. Impregnation of the end spacers on inner layer is foreseen for the next days. Update from last presentation

E. Cavanna, N. Bourcey, P. Ferracin, S. Izquierdo Bermudez, J. Mazet, J. C. Perez, F-O. Pincot X. Sarasola Coil Measurements with faro arm ongoing Measurements made on a granite bench Coil supported on two points Method and tools are under development.

E. Cavanna, N. Bourcey, P. Ferracin, S. Izquierdo Bermudez, J. Mazet, J. C. Perez, F-O. Pincot X. Sarasola Coil 102 Coil ready for impregnation 5

E. Cavanna, N. Bourcey, P. Ferracin, S. Izquierdo Bermudez, J. Mazet, J. C. Perez, F-O. Pincot X. Sarasola Coil 102 Pre-tinning of Nb 3 Sn cables (update from last presentation): Problem during pre-tinning of Nb 3 Sn cable on outer layer: 4 strands broke. It happened during cool down, when the operators were dismounting the mould. 6

E. Cavanna, N. Bourcey, P. Ferracin, S. Izquierdo Bermudez, J. Mazet, J. C. Perez, F-O. Pincot X. Sarasola Coil 102 Pre-tinning of Nb 3 Sn cables: 7 Solution: 3 strands of NbTi have been added before the splicing

E. Cavanna, N. Bourcey, P. Ferracin, S. Izquierdo Bermudez, J. Mazet, J. C. Perez, F-O. Pincot X. Sarasola Coil 102 Pre-tinning of Nb 3 Sn cables: 8 Dimensions of the damaged area, before cutting the cable NOTE: dimensions in mm, evaluated for proportion with respect to the cable width

E. Cavanna, N. Bourcey, P. Ferracin, S. Izquierdo Bermudez, J. Mazet, J. C. Perez, F-O. Pincot X. Sarasola Coil 102 Pre-tinning of Nb 3 Sn cables: 9 Dimensions of the damaged area, after cut of the cable and repair NOTE: dimensions in mm, evaluated for proportion with respect to the cable width

E. Cavanna, N. Bourcey, P. Ferracin, S. Izquierdo Bermudez, J. Mazet, J. C. Perez, F-O. Pincot X. Sarasola Coil 103 Coil ready for heat treatment 10

E. Cavanna, N. Bourcey, P. Ferracin, S. Izquierdo Bermudez, J. Mazet, J. C. Perez, F-O. Pincot X. Sarasola Traces for LARP N°2 sets of traces have been manufactured for LARP Electrical checks still to be done 11

E. Cavanna, N. Bourcey, P. Ferracin, S. Izquierdo Bermudez, J. Mazet, J. C. Perez, F-O. Pincot X. Sarasola Pole gaps 12 Initial pole gap set for each coil Coil 001 Cu: 3 mm Coil 101 Nb 3 Sn lowgrade: 7.5 mm Coil 102 Nb 3 Sn: 5 mm Coil 103: 4.5 mm

E. Cavanna, N. Bourcey, P. Ferracin, S. Izquierdo Bermudez, J. Mazet, J. C. Perez, F-O. Pincot X. Sarasola Pole gaps 13 Check of pole gap during fabrication * gap after heat treatment evaluated by sight (no possibility to measure it): however the gap is almost closed. ** for coil 102, winding mandrel dismounted on Friday, and pole gap measured on Monday. Initial GAP (set before winding) [mm] GAP just after curing and release tension [mm] GAP before heat treatment [mm] GAP after heat treatment [mm] Coil 000 (Cu) Coil 101 (Nb 3 Sn low grade) Coil 102 (Nb 3 Sn) Coil 103 (Nb 3 Sn)

E. Cavanna, N. Bourcey, P. Ferracin, S. Izquierdo Bermudez, J. Mazet, J. C. Perez, F-O. Pincot X. Sarasola Pole gaps 14 Some considerations Total contraction coil 101: = 1.9 mm (0.4 mm during reaction) Total contraction coil 102: = 1.63 mm (0.43 during reaction) Contraction coil 103 before reaction: 1.4 mm If coil 103 will contract of 0.4 mm during reaction, the gap contraction will be 4.5-( )=1.8 mm