High field, single turn toroidal magnetic technology demonstration for IGNITEX

Summary Form only given, as follows. The design and analysis of a scaled-down prototype (0.06 scale in linear dimensions) of the toroidal field (TF) magnet of the Texas fusion ignition experiment (IGNITEX) is discussed. The primary goal of the IGNITEX Technology Demonstrator (ITD) is to prove the operation of a low-cost, single-turn, 20-T toroidal coil powdered by the Balcones homopolar generator (HPG) power supply. The selection of the prototype TF coil scale of 0.06 is based on the linear relationship between the current that can be delivered with the Balcones HPG and the need to achieve a 20-T field in IGNITEX. The design philosophy of the magnet has been to use materials with the highest strength and electrical conductivity available and preload it as much as possible. The single-turn coil eliminates the need for turn-to-turn insulation and therefore better utilizes the available inner leg area for stress and thermal management. The objectives of the ITD program are outlined.<>