1. The LT Dipole July 8 th, 2014

2. Motivation Combine expertise of LBNL & TAMU to overcome common obstacles and reach higher fields with regular milestones Modular approach –LT1: 13T Nb 3 Sn open-aperture (9x5 cm 2 ) –LT2: 15T, LT1 + a racetrack of BSCCO-2212 –LT3: 19T, LT2 + a flared winding of BSCCO-2212 Stress management and continuous support of reacted cable to avoid damage losses

3. Magnetics for LT1

4. Magnetics for LT2

5. Stress management structure Magnetics for LT3

6. Before pancake winding Add pic of just mandrel Window for quench heaters and voltage taps

7. Mandrel ‘heart’ Magnetic cutout also serves as a slot Common design allows part reuse Thin-skin slots into place

8. Pancake and associated structure

9. Pre-structure for flare These pieces provide supported form, and allow safe removal of flare 873mm bending radius, 10° arc (same as HD3)

10. Flared winding and structure Pins for flare? Window for quench heaters and voltage taps

11. Remove mandrel ‘heart’ and install spanner plates Aperture now cleared in end pieces Continuous support of Nb 3 Sn mitigates assembly damage

12. Assembling two halves Common wall pushes out plates through thick-skin Continuous support of Nb 3 Sn mitigates assembly damage

13. Removal of spanner plates

14. Completed coil package

15. Bladder/key magnet assembly Similar to HD2/HD3, yoke is keyed against shell, then coil package is inserted and keyed