A portable electronic device including a housing having a receptacle for at least one semiconductor die, a terminal carried by the housing and operably coupled to the at least one semiconductor die, an attached cover, and operation indicators. The apparatus for producing a carbon structure further including a magnetic field generating unit 20 to 23 for forming at least a magnetic field including multidirectional lines of magnetic force or a magnetic field including a component parallel with the traveling direction of a discharge current, in an area where the discharge plasma is generated. In some implementations, the inner andor outer spherical members are substantially spherical and include a truncated bottom portion that mounts to a base.