All magnetic in open circuit for the tubes has fields crusaders

摘要

P the invention relates to a magnetic assembly is in open circuit for the tubes to fields crossed. / p & & p & it comprises a first permanent magnet of high induction, for example of alnico, a second permanent magnet of lower induction, but of greater force coercive, e.g. samarium - cobalt, of larger surface, but of smaller volume, and a frustoconical intermediate part interposed between the two magnets and adapting their characteristics. In particular, the invention applies to the magnetron. / p