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To control an input energy for a load, an impedance control with a gap distance of an electron beam diode was studied using an intense pulsed-power generator. The output current of the pulsed-power generator as a function of the gap distance of electron beam diode was measured. It indicated that the behaviors of the experimentally obtained peak current and the theoretically obtained space-charge limited current were found to decrease with an increase in the gap distance. The input energy for the load was estimated from the output current, which decreased with an increase in the gap distance. It also revealed the space-charge limited current suppresses the input energy for the load with a decade.
Magnetization measurement was carried out for Ba2Y1Cu3O7-y bulk and powder samples at 77K and 4.2K in order to evaluate intrinsic Jc. Excellent Jc values above 10 A/cm were obtained for powder samples at 77K and lOkOe. These Jc values were somewhat increased by substiution of Er for Y. High temperature sintering at 1030°C brings about drastic increase in magnetization which can be explained by the grain coarsening.
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