First 100 T non-destructive magnet

Abstract

Abstract-The first 100 T non-destructive (100 T ND) magnet and power supplies as currently designed are described. This magnet will be installed as part of the user facility research equipment at the National High Magnetic Field Laboratory (NHMFL) Pulsed Field Facility at Los Alamos National Laboratory. The 100 T ND magnet will provide a 100 T pulsed field of 5 ms duration (above 90% of full field) in a 15 mm diameter bore once per hour. Magnet operation will be nondestructive. The magnet will consist of a controlled power outer coil set which produces a 47 T platform field in a 225 mm diameter bore. Located within the outer coil set will be a 220 mm outer diameter capacitor powered insert coil. Using inertial energy storage a synchronous motor/generator will provide ac power to a set of seven ac-dc converters rated at 64 MW/80 MVA each. These converters will energize three independent coil circuits to create 170 MJ of field energy in the outer coil set at the platform field of 47 T. The insert will then be energized to produce the balance of the 100 T peak field using a 2.3 MJ, 18 kV (charged to 15 kV), 14.4 mF capacitor bank controlled with solidstate switches. The magnet will be the first of its kind and the first non-destructive, reusable 100 T pulsed magnet. The operation of the magnet will be described along with special features of its design and construction.Index Terms-high field, pulsed magnet, 100 tesla

Progress of the insert coil for the US-NHMFL multi-shot pulse magnet

“…The insert design differs significantly from traditional NHMFL user-magnets in that: (1) The conductor temperature excursion is 100-150 K larger. (2) The layer-to-layer stress distribution is nearly uniform.…”

“…The magnet consists of an outer coil set, which will produce a background at peak-field of 44 T; and an insert coil to reach field. A capacitor bank drives the insert coil [1,2].…”

First 100 T non-destructive magnet outer coil set

“…The mechanical safety margins of the insulation were checked using the Mohr-Coulomb criterion. The criterion states that in ( 1 ) where:…”

“…The 100 T ND insert coil provides the balance of the 100 T field in a 15 mm bore. A complete description of the 100 T ND magnet is given in [1].…”

The U.S. NHMFL 100 Tesla multi-shot magnet

“…The magnet is suspended in a cryogenic dewar (liquid nitrogen is used as the coolant). Details concerning the design and operation of the magnet can be found in [1] - [3]. Fig.…”