1. E. Cavanna, N. Bourcey, P. Ferracin, S. Izquierdo Bermudez, J. Mazet, J. C. Perez, F.O. Pincot, X. Sarasola 03-02-2015

2. 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)3D Measurements Post-impregnation MQXF-102First Coil (Nb3Sn)Impregnation MQXF-103Nb3SnHeat treatment MQXF-104Nb3SnWinding outer layer 1.Status 2.Modifications of trace 3.Pole gaps

3. 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 Impregnation of end spacers done Problem during impregnation of splice block inner layer: the injection tool broke and the spacer was only partially filled

4. E. Cavanna, N. Bourcey, P. Ferracin, S. Izquierdo Bermudez, J. Mazet, J. C. Perez, F-O. Pincot X. Sarasola Coil 101 4 Measurements with faro arm done The electrical connections of the trace have been soldered Impregnation of end spacers ongoing

5. E. Cavanna, N. Bourcey, P. Ferracin, S. Izquierdo Bermudez, J. Mazet, J. C. Perez, F-O. Pincot X. Sarasola Coil 101: 3D measurements 5 Scope: Evaluation of the overall deformation of the coil Deviation of the cross sections with respect to the nominal one Layout of measurements: Coil on the bench supported in two points Hardware: Faro-arm edge 2.7 Software: Polyworks 2014

6. E. Cavanna, N. Bourcey, P. Ferracin, S. Izquierdo Bermudez, J. Mazet, J. C. Perez, F-O. Pincot X. Sarasola Coil 101: 3D measurements 6 Overall deformation: The outer surface of the coil has been inspected with the probe Maximum upwards deformation: 0.476 mm Maximum downwards deformation: 0.577 mm Deviation from straightness: ~ 1mm

7. E. Cavanna, N. Bourcey, P. Ferracin, S. Izquierdo Bermudez, J. Mazet, J. C. Perez, F-O. Pincot X. Sarasola Coil 101: 3D measurements 7 Deviation of the cross sections from the nominal one: Perimeter of the coil inspected on 7 cross sections Rough data are elaborated by a Macro that subtracts the overall deformation from the measurements taken The ouput is the real perimeter of each cross section, to be compared with the nominal one Results: The cross sections are usually smaller than the nominal one: i.e. the real perimeter is inside the ideal one (max deviation: 0.188 mm) Only a few points are outside the nominal perimeter: max deviation about 0.05 mm Thanks to Michela Semeraro for the measurements and to Christian Löffler for the Macro!

8. E. Cavanna, N. Bourcey, P. Ferracin, S. Izquierdo Bermudez, J. Mazet, J. C. Perez, F-O. Pincot X. Sarasola Coil 102 Impregnation ongoing 8

9. 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. 9

10. 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: 10 Solution: 3 strands of NbTi have been added before the splicing

11. 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: 11 Dimensions of the damaged area, before cutting the cable NOTE: dimensions in mm, evaluated for proportion with respect to the cable width

12. 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: 12 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

13. 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: 13 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

14. 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: 14 Other little damage at the beginning of the splice

15. E. Cavanna, N. Bourcey, P. Ferracin, S. Izquierdo Bermudez, J. Mazet, J. C. Perez, F-O. Pincot X. Sarasola Coil 103 No update from last presentation: the coil is ready for heat treatment, not yet performed. 15

16. E. Cavanna, N. Bourcey, P. Ferracin, S. Izquierdo Bermudez, J. Mazet, J. C. Perez, F-O. Pincot X. Sarasola Coil 104 Winding of inner layer done Curing of inner layer done Winding of outer layer is ongoing 16

17. E. Cavanna, N. Bourcey, P. Ferracin, S. Izquierdo Bermudez, J. Mazet, J. C. Perez, F-O. Pincot X. Sarasola Modification of trace 17 Proposal of modifications for the next traces Displacements of the pads on the trace for soldering the vtap from the splices: 10 mm towards LE Increase the length of all the pads. Our proposal is an elongation of 5 mm (i.e. 2.5 mm each side) We will have our labels on the trace for the identification of the connections: proper information will be given We will keep for the moment the current length of the circuit of the trace

18. E. Cavanna, N. Bourcey, P. Ferracin, S. Izquierdo Bermudez, J. Mazet, J. C. Perez, F-O. Pincot X. Sarasola Modification of trace 18 The traces will be cut during the preparation for the impregnation, to have space for the installation of the strain gauge on the pole of inner layer.

19. E. Cavanna, N. Bourcey, P. Ferracin, S. Izquierdo Bermudez, J. Mazet, J. C. Perez, F-O. Pincot X. Sarasola Pole gaps 19 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 Coil 104: 2 mm

20. E. Cavanna, N. Bourcey, P. Ferracin, S. Izquierdo Bermudez, J. Mazet, J. C. Perez, F-O. Pincot X. Sarasola Pole gaps 20 Check of pole gap during fabrication 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)32.70.1 Coil 101 (Nb 3 Sn low grade) 7.565.6 Coil 102 (Nb 3 Sn) 54.13.83.37 Coil 103 (Nb 3 Sn)4.53.43.11 Coil 104 (Nb 3 Sn)2