Numerical Experiments on Matching Vacuum Transmission Lines to Loads

Leopold, J. G.; Gad, Raanan; Leibovitz, C.; Navon, I.

doi:10.1109/tps.2008.2005721

Cited by 8 publications

(11 citation statements)

References 26 publications

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“…1, we present a reference calculation where a coaxial cylindrical transmission line of b = 20 cm and a = 10 cm is fed at the z = 0 boundary by a voltage pulse rising in 5 ns to V in = 2 MV. This transmission line is attached to a coaxial concentric conical transmission line of length C = 50 cm truncated to a parallel-plate diode with an r A = 5 mm anode face radius and an anode-cathode separation of d C−A = 1 cm (parameters are defined in [1,Fig. 5]).…”

Section: "Designer" Knob and Dustbinmentioning

confidence: 99%

“…We have shown in [1] that for an open upstream boundary, the BD's operating voltage cannot surpass the self-limit of the magnetically insulated coaxial cylindrical transmission line. With increasing cone length, matching between the diode and 0093-3813/$25.00 © 2009 IEEE the cylindrical transmission line improves, and the operating voltage and current density on the anode increase.…”

mentioning

confidence: 97%

“…The sheath current flows regularly toward the apex of the BD [1] and is completely incorporated in the diode current. We have shown in [1] that for an open upstream boundary, the BD's operating voltage cannot surpass the self-limit of the magnetically insulated coaxial cylindrical transmission line.…”

mentioning

confidence: 99%

“…We are interested in power-generating machines of ∼2 MV [1], and all the results of this paper are for this value.…”

mentioning

confidence: 99%

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Regular Charged Particle Flow in Pulsed-Power-Driven Nonuniform Transmission Lines

Leopold

Gad

Leibovitz

et al. 2009

IEEE Trans. Plasma Sci.

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In electron-emitting nonuniform transmission lines at currents sufficient to support magnetic insulation, it is possible to maintain regular Brillouin electron flow by matching the vacuum impedances of various parts of the transmission line and by ensuring adiabatic transition between them. This idea, first demonstrated numerically in the design of the Brillouin diode (BD), is extended to the structure of the pair known as knob and dustbin. Rather than shunting current to the walls, a "designer" knob-dustbin allows regular flow of the entire current to the BD. Index Terms-Brillouin flow, magnetic insulation, transmission line.

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Section: "Designer" Knob and Dustbinmentioning

confidence: 99%

mentioning

confidence: 97%

mentioning

confidence: 99%

“…We are interested in power-generating machines of ∼2 MV [1], and all the results of this paper are for this value.…”

mentioning

confidence: 99%

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Regular Charged Particle Flow in Pulsed-Power-Driven Nonuniform Transmission Lines

Leopold

Gad

Leibovitz

et al. 2009

IEEE Trans. Plasma Sci.

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“…7 In the practical application, the phenomena of ion emission is particularly possible to emerge at the end of MITL near load, where anode surface heating mechanisms (such as Ohmic heating because of linear current convergence on the anode and electron deposition from the load) become significant. [7][8][9] Power pulse cannot be transported effectively unless both the electron flow 10,11 and ion flow 7 are magnetically insulated. Currently, the magnetically insulated theory with only electron flow [12][13][14][15][16][17][18][19][20][21][22][23][24][25] has already been developed for several ten years, and the magnetically insulated theory with only ion flow 7 has been developed by Ottinger and Schumer since 2006.…”

Section: Introductionmentioning

confidence: 99%

Magnetically insulated theory with both electron and ion flows

Wang¹,

Meng²,

Liu³

et al. 2012

Physics of Plasmas

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Both the ion emission from anode surface and the electron emission from cathode surface may occur in the magnetically insulated transmission line (MITL) with a very high pulsed power and a very large current density. A model for the MITL with both electron and ion flow is developed. In this model, physical quantities (such as space-charge sheath thicknesses and flow currents) in the MITL are theoretically analyzed, and the specific expression for the voltage on the line by the terms of currents is derived. Furthermore, particle-in-cell simulations are carried out to verify the theoretical results. V C 2012 American Institute of Physics. [http://dx.

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Particle-in-cell simulations of current loss in magnetically insulated transmission line with inductive helical support

et al. 2019

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High inductive helical support provides a solution to controlling the alignment error of inner electrodes in magnetically insulated transmission lines (MITLs). Three-dimensional particle-in-cell simulations were performed to examine the current loss mechanism and the effects of structural parameters on electron flow in an MITL with a helical inductor. An empirical expression related to the ratio of electron current loss to anode current and the ratio of anode current to self-limited current was obtained. Electron current loss caused by helical inductor with different structures was displayed. The results indicate that the current loss in an MITL, near an inductive helical support, comprises both the inductor current and the electron current loss. The non-uniform structure and current of a helical inductor cause an abrupt change in the magnetic field near the helical support, which leads to anomalous behavior and current loss of electron flow. In addition, current loss in the inductive helical-supported MITL is negligible when the inductance of the support is sufficiently high. This work facilitates the estimation of electron current loss caused by the inductive helical support in MITLs.

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Numerical Experiments on Matching Vacuum Transmission Lines to Loads

Cited by 8 publications

References 26 publications

Regular Charged Particle Flow in Pulsed-Power-Driven Nonuniform Transmission Lines

Regular Charged Particle Flow in Pulsed-Power-Driven Nonuniform Transmission Lines

Magnetically insulated theory with both electron and ion flows

Particle-in-cell simulations of current loss in magnetically insulated transmission line with inductive helical support

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