Superconducting magnet issues "shaken" out of them, until they are eventually able to operate reliably at their full planned current without experiencing quenches. Although the idea of making electromagnets with superconducting wire was proposed by Heike Kamerlingh Onnes shortly after he discovered superconductivity in 1911, a practical superconducting electromagnet had to await the discovery of superconducting materials that could support large critical supercurrent densities in high magnetic fields. The first successful superconducting magnet was built by G.B. Yntema in 1955 using niobium wire and achieved a field of 0.7 T at 4.2 K. Then, in 1961, J.E. Kunzler, E. Buehler, F.S.L. Hsu,
Heike Kubasch Heike Kubasch Heike A. Kubasch is a game designer who has worked primarily on role-playing games. Heike Kubasch was one of the original principles of Iron Crown Enterprises, along with Pete Fenlon, S. Coleman Charlton, Richard H. Britton, Terry K. Amthor, Bruce Shelley, Bruce Neidlinger, Kurt Fischer, and Olivia Fenlon. Kubasch wrote "" (1982), the first Middle-earth campaign supplement book published by ICE as a "Rolemaster" supplement. Kubasch later became the President of Mjolnir LLC, with Bruce Neidlinger as CEO. Kubasch and Tim Dugger authored the game "HARP: High Adventure Role Playing" (2003) for Mjolnir. Her "D&D" design work includes