Investigation of Reinforced, Magnet-Coil Support Shells for the NHMFL 100 Tesla Non-Destructive Magnet

Abstract

The National High Magnetic Field Laboratory (NHMFL) at Los Alamos, New Mexico, and Tallahassee, Florida has undertaken an effort to design and build a 100 T non-destructive magnet. The magnet will be located in Los Alamos and will be used for studying properties of materials at high magnetic fields. The goal for the 100 T magnet is a duration of 15 ms above 80 T in a 24-mm bore. The pulsed magnet will be cooled to 80K prior to each shot. The magnet will consist of a relatively small, capacitor-driven magnet at the center (called the 'insert') specifically designed to operate within a large "platform" magnetic field. Located around the small capacitor-driven magnet is an outer set of seven nested coils (called the 'outsert') driven by energy stored in a motor/generator. Each of these seven coils in the outsert is supported by a cylindrical reinforcing shell. The reinforcing shells for the inner four coils of the outsert have a unique design. These four shells are constructed of Nitronic 40 'bobbins' that are over- wrapped with high-strength 301SS. This paper describes the design, analysis, and testing of these reinforced, magnet-coil support shells.