Study of an optimal configuration of an X-Band ferrofluid insulator S. Clerjon, P. C. Fannin, B. Bayard, D. Vincent and G. Noyel Eur. Phys. J. AP, 5 2 (1999) 179-183 Published online: 15 February 1999 DOI: 10.1051/epjap:1999101