The emergence of high-energy-product permanent magnets has made possib
le the generation of extraordinarily high magnetic fields in the inter
nal working spaces of relatively small structures. The widespread use
of such structures has been hampered by the variety and complexity of
their magnetic components and the concomitant difficulty and expense o
f manufacture. This paper describes approaches to fabrication and asse
mbly that should significantly ease both fabricational and economic pr
oblems. Examples of these approaches are given for the production of c
ylindrical multipolar sources (magic rings, quadrupolar electron beam
guides) and spherical dipolar sources (magic spheres).