The flow dynamics along non-uniform self magnetically insulated transmission lines

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

doi:10.1109/ppc.2011.6191527

Cited by 5 publications

(3 citation statements)

References 17 publications

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“…These results seem to conflict with the simulation results depicted in [15], which indicates for a conical transition with a large transition length and the same vacuum impedance as coaxial sections, the power flow condition is close to that of an uniform MITL, and the cathode current should not change a lot. This discrepancy might be due to the fact that the downstream coaxial MITL cathode current B-dot location is just in or very close to the loss front of self-limited flow, where many of electrons are launched from the cathode into the A-K gap, making the cathode current decrease remarkably.…”

Section: Resultscontrasting

confidence: 59%

“…The vacuum impedance is related to the canonical constant of motion in the direction of power flow and if the change in the vacuum impedance of transition between the geometrical shapes is small, regular flow could continue undisturbed. So the canonical momentum in this MITL configuration is conserved [15]. In the experiment hollow cathode diodes with different A-K distances were used as shown in Fig.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Current Transmission Efficiency for Conical Magnetically Insulated Transmission Line on a 1.0-MV Linear Transformer Driver System

Guo

Zou

Liu

et al. 2015

IEEE Trans. Plasma Sci.

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Current transmission efficiency in a conical transition magnetically insulated transmission line (MITL) has been studied experimentally on a 1.0-MV linear transformer driver system, which has 10 identical cavities connected in series with MITL. Transmission efficiencies of anode current as high as 98.4% and 93.1% could be achieved when the MITL operates at load-limited and self-limited flows, respectively. As for the cathode current, because of the sufficient length of conical transition MITL, cathode current is also able to sustain high transmission efficiency. But as long as the diode gap is too large, many of the electrons will be launched into the anodecathode gap and the cathode current near the diode drastically decreases. Particle-in-cell simulations were conducted to validate the conclusions. The simulation results agree with experiments.Index Terms-Current transmission efficiency, magnetically insulation, particle-in-cell (PIC) simulation, pulse power systems.

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Section: Resultscontrasting

confidence: 59%

Section: Methodsmentioning

confidence: 99%

Current Transmission Efficiency for Conical Magnetically Insulated Transmission Line on a 1.0-MV Linear Transformer Driver System

Guo

Zou

Liu

et al. 2015

IEEE Trans. Plasma Sci.

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“…There is electron current loss to the walls along downstream cylindrical MITL prior to the edge where the entire current is shunted to the anode wall as anode current. 19,21,22 In addition, the electron loss front will cut down the pulse width. The cathode current amplitudes of the PIC simulation by probes P1, P2, P3, P4, P5 and P6 are 0.97 MA, 0.86 MA, 0.78 MA, 0.77 MA, 0.77 MA, 0.38 MA.…”

Section: A Downstream Mitl Work On Self-limited Flowmentioning

confidence: 99%

PIC simulation of the vacuum power flow for a 5 terawatt, 5 MV, 1 MA pulsed power system

Liu

Zou²,

Liu

et al. 2018

AIP Advances

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In this paper, a 5 Terawatt, 5 MV, 1 MA pulsed power system based on vacuum magnetic insulation is simulated by the particle-in-cell (PIC) simulation method. The system consists of 50 100-kV linear transformer drive (LTD) cavities in series, using magnetically insulated induction voltage adder (MIVA) technology for pulsed power addition and transmission. The pulsed power formation and the vacuum power flow are simulated when the system works in self-limited flow and load-limited flow. When the pulsed power system isn’t connected to the load, the downstream magnetically insulated transmission line (MITL) works in the self-limited flow, the maximum of output current is 1.14 MA and the amplitude of voltage is 4.63 MV. The ratio of the electron current to the total current is 67.5%, when the output current reached the peak value. When the impedance of the load is 3.0 Ω, the downstream MITL works in the self-limited flow, the maximums of output current and the amplitude of voltage are 1.28 MA and 3.96 MV, and the ratio of the electron current to the total current is 11.7% when the output current reached the peak value. In addition, when the switches are triggered in synchronism with the passage of the pulse power flow, it effectively reduces the rise time of the pulse current.

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Instabilities in the electron flow along magnetically insulated transmission lines

Leopold

Navon

2013

2013 19th IEEE Pulsed Power Conference (PPC)

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The flow dynamics along non-uniform self magnetically insulated transmission lines

Cited by 5 publications

References 17 publications

Current Transmission Efficiency for Conical Magnetically Insulated Transmission Line on a 1.0-MV Linear Transformer Driver System

Current Transmission Efficiency for Conical Magnetically Insulated Transmission Line on a 1.0-MV Linear Transformer Driver System

PIC simulation of the vacuum power flow for a 5 terawatt, 5 MV, 1 MA pulsed power system

Instabilities in the electron flow along magnetically insulated transmission lines

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