MEGAGAUSS MAGNETIC FIELDS are intimately connected with such entities as megaämperes, megajoules and megabars. Density of stored magnetic energy corresponding to megagauss fields is higher than that of high explosives, and it follows, therefore, that coils producing such fields will disintegrate under the enormous pressures and energy dissipations required. These and other relations between megagauss fields and explosives have caused the subject to fall for many years under the shadow of military classification.