High Power Low Inductance Dummy Load Made of MetalFilm Resistors
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    Abstract:

    This paper presents a high power low inductance dummy load made of metal film resistors, of which the resistance is 90Ω,and the inductance is ~55nH, nearly without stray capacitance. Cooperated with a capacitive divider, the dummy load has been utilized to measure high voltage pulse with a rise time of several ns for testing a 10-stage wave erection Marx generator. Experimental results verify the high performance of this load, compared with a water resistor load of the same resistance. This high performance is determined by two virtues in the design: one is for using non-capacitance of the metal film resistors and the other is for adopting a structure of impedance tapering line. Power tolerance of the load is evaluated theoretically. In addition, the response ability fed by a square voltage wave is simulated by PSpice software. The dummy load has been tested on the wave erection Marx generator, producing a high voltage pulse with an amplitude of ~210kV, a pulse width of ~40ns and a rise time of ~5ns, and long term operations show its high reliability and stability.

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History
  • Received:May 23,2008
  • Revised:
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  • Online: November 08,2012
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