Accession Number : AD0475369


Title :   DESIGN STUDIES FOR ULTRA-FAST, LOW-IMPEDANCE HIGH-PEAK-POWER PULSED SYSTEMS


Descriptive Note : Technical rept. Apr 1962-Aug 1965


Corporate Author : FIELD EMISSION CORP MCMINNVILLE OR


Personal Author(s) : Brewster, J L ; Charbonnier, F M ; Garrett, L F ; Riegelmann, K W ; Trolan, J K


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/475369.pdf


Report Date : Nov 1965


Pagination or Media Count : 153


Abstract : Ultrafast pulsed power systems have proved to be effective energy sources for transducers to produce intense X rays, dense electron beams, and very high temperature plasmas. The principal function of a single shot or low repetition rate pulsed power system is to accept energy at low power levels and subsequently to deliver such energy at extremely high power levels, with maximum efficiency, to a suitable transducer. This objective can best be met by use of either distributed or lumped-constant pulse forming networks where optimum performance is realized by maintaining the proper impedance match between the power source and transducer throughout the energy delivery process. Attainment of the proper impedance match can impose stringent and sometimes contra- indicating requirements upon the dielectric storage media, the switching mechanism, and the transducer chamber. The most promising approach to such power sources appears to be a pulse-charged two-stage coaxial Blumlein system. Such a system can deliver 25 kiloamperes at 2 megavolts in a pulse width of 40 nanoseconds to a suitably matched flash X-ray tube to produce relatively high dose rates with long tube life and minimal maintenance. The performance of a Blumlein exploding wire system, with respect to the rate of energy transfer, is primarily limited by the uncancelled transducer chamber impedance to the extent required to give di/dt values close to 10 to the 14th power amp/sec for wires a few mils in diameter. Attainment of transducer chamber voltage gradients of 300 kv/cm or better in vacuum will result in di/dt values of 1 to 2 x 10 to the 13th power amp/sec.


Descriptors :   *PULSE GENERATORS , DIELECTRIC PROPERTIES , ELECTRICAL IMPEDANCE , ELECTRON BEAMS , GAS DISCHARGES , IMPEDANCE MATCHING , PLASMAS(PHYSICS) , POWER TRANSFORMERS , SWITCHING CIRCUITS , TRANSDUCERS , TRANSMISSION LINES , VOLTAGE , X RAY TUBES


Subject Categories : Test Facilities, Equipment and Methods


Distribution Statement : APPROVED FOR PUBLIC RELEASE