A compact submicrosecond, high current generator

B. M. Kovalchuk, A. V. Kharlov, V. B. Zorin, A. A. Zherlitsyn

    Research output: Contribution to journalArticle

    11 Citations (Scopus)

    Abstract

    Pulsed current generator was developed for experiments with current carrying pulsed plasma. Main parts of the generator are capacitor bank, low inductive current driving lines, and central load part. Generator consists of four identical sections, connected in parallel to one load. Capacitor bank is assembled from 24 capacitor blocks (100 kV, 80 nF), connected in parallel. It stores 9.6 kJ at 100 kV charging voltage. Each capacitor block incorporates a multigap spark switch, which is able to commute by six parallel channels. Switches operate in dry air at atmospheric pressure. The generator was tested with an inductive load and a liner load. At 17.5 nH inductive load and 100 kV of charging voltage it provides 650 kA of current amplitude with 390 ns rise time with 0.6 damping resistors in discharge circuit of each capacitor block. The net generator inductance without a load was optimized to be as low as 15 nH, which results in extremely low impedance of the generator (∼0.08). It ensures effective energy coupling with a low impedance load such as Z pinch. The generator operates reliably without any adjustments in 70-100 kV range of charging voltage. Jitter in delay between output pulse and triggering pulse is less than 5 ns at 70-100 kV charging voltage. Operation and handling are very simple, because no oil or purified gases are required for the generator. The generator has dimensions 5.24×1.2×0.18 m3 and total weight about 1400 kg, thus manifesting itself as simple, robust, and cost effective apparatus.

    Original languageEnglish
    Article number083504
    JournalReview of Scientific Instruments
    Volume80
    Issue number8
    DOIs
    Publication statusPublished - 9 Sep 2009

    Fingerprint

    high current
    Capacitors
    generators
    capacitors
    Electric potential
    charging
    Switches
    electric potential
    Jitter
    Electric sparks
    Inductance
    Resistors
    Atmospheric pressure
    switches
    impedance
    Damping
    line current
    Plasmas
    linings
    Networks (circuits)

    ASJC Scopus subject areas

    • Instrumentation

    Cite this

    Kovalchuk, B. M., Kharlov, A. V., Zorin, V. B., & Zherlitsyn, A. A. (2009). A compact submicrosecond, high current generator. Review of Scientific Instruments, 80(8), [083504]. https://doi.org/10.1063/1.3193714

    A compact submicrosecond, high current generator. / Kovalchuk, B. M.; Kharlov, A. V.; Zorin, V. B.; Zherlitsyn, A. A.

    In: Review of Scientific Instruments, Vol. 80, No. 8, 083504, 09.09.2009.

    Research output: Contribution to journalArticle

    Kovalchuk, BM, Kharlov, AV, Zorin, VB & Zherlitsyn, AA 2009, 'A compact submicrosecond, high current generator', Review of Scientific Instruments, vol. 80, no. 8, 083504. https://doi.org/10.1063/1.3193714
    Kovalchuk BM, Kharlov AV, Zorin VB, Zherlitsyn AA. A compact submicrosecond, high current generator. Review of Scientific Instruments. 2009 Sep 9;80(8). 083504. https://doi.org/10.1063/1.3193714
    Kovalchuk, B. M. ; Kharlov, A. V. ; Zorin, V. B. ; Zherlitsyn, A. A. / A compact submicrosecond, high current generator. In: Review of Scientific Instruments. 2009 ; Vol. 80, No. 8.
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