devices 204 if more than one is present may be configured to propel the particles in any chosen random or chance direction with respect to any of the other explosive devices 204 as discussed above concerning fig2 a and 2b the electromagnetic pulse generator 222 may be combined with the plasma antenna generator 226 to form an electromagnetic pulse transmitting system 228 the ionizable material may comprise any material capable of being ionized as a result of aerodynamic heating induced by being propelled by the explosive charge 204 for example the ionizable material may comprise an alkali metal a compound of one or more alkali metals e g alkali salts alkali carbonates and the like or may comprise a constituent of a compound of one or more alkali metals further the ionizable material may comprise a clathrate of an alkali metal a constituent of the clathrate of the alkali metal an intercalation compound of an alkali metal or a constituent of the intercalation compound of the alkali metal alkali metals include lithium sodium potassium rubidium cesium and francium in any case the ionizable material is contained in a ceramic portion and the ceramic portion may be crystalline or amorphous e g glass for example soda lime glasses and borosilicate glasses as well as ca u2014 al 2 o 3 u2014 sio 2 mg u2014 cao na u2014 sio 3 u2014 sio 2 and zno u2014 sio 2 ceramics typically contain up to about 15 percent alkali other.