15+ T HTS SOLENOID FOR MUON ACCELERATOR PROGRAM*

This paper presents the construction and test results of an all-HTS solenoid which reached a central field >15 T, the highest field ever achieved in an HTS solenoid. This is a part of ~35 T solenoid being developed under a series of SBIR with Brookhaven National Laboratory (BNL) being a research partner with Particle Beam Lasers (PBL), Inc. The solenoid has an inner diameter of ~25 mm, outer diameter ~95 mm and a length ~70 mm. It consists of 14 single pancake coils made from ~4 mm wide 2 nd Generation High Temperature Superconductor (2G HTS) from SuperPower Inc., co-wound with ~4 mm wide, 0.025mm thick stainless steel tape.