Synchronization of parallel-connected plasma opening switches and switching the current to the load

Altukhov, A. A.; Blinov, P. I.; Dolgachev, G. I.; Maslennikov, D. D.; Fedotkin, A. S.; Khodeev, I. A.

doi:10.1134/1.1601643

Cited by 3 publications

(5 citation statements)

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“…This Two POSs in the circuit with a double POS are syn chronized owing to inductive coupling between them [6]: they have a common electrode, and the grounded electrodes are connected at the POS input and output, L coup ≈ 5 nH. The POS voltage is determined by the energy density expended for the ion acceleration, i.e., plasma erosion.…”

Section: Circuit Diagram Of the Generator And Calculation Of Its Paramentioning

confidence: 99%

“…In experi ments [2,6] on the modeling of a liner load, a capaci tor that behaved as a liner during current switching was used as the load: at the beginning, it is a low imped ance load and, as a current continues flowing, the capacitor is charged to the POS voltage. The same is observed for a liner: the voltage across it appears upon its compression by the magnetic field of the current that flows through the liner.…”

Section: Circuit Diagram Of the Generator And Calculation Of Its Paramentioning

confidence: 99%

“…the parameters of a pulse that is obtained across the inductive load L l on the relative value of its inductance L l /L 0 . In the case of a single module, the load that shunts the POS sector is the inductance of the load sector:L m.l = L sect.lin + L sect.lnr ,( 6 ) and the inductive storage is the inductance of the power supply module L m.0 . As follows from[7], L sect.l must be chosen in a range of (0.4-1.0)L m.0 .…”

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A scheme of a modular plasma-opening-switch-based generator of megaampere currents for experiments with Z-pinches

et al. 2013

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A generator that is based on a plasma opening switch (POS) (Fig. 1a) contains a capacitive energy storage С 0 , a switch Sw (spark gap), an inductive stor age L 0 , a POS (two coaxial electrodes with a plasma jumper and a longitudinal magnetic field in the inter electrode gap), and an inductive load [1]. The induc tive storage L 0 includes the inductances of all elements of the capacitive storage-POS circuit, and the induc tive load L l includes the inductances of the POS-liner line, i.e., the inductances of the line L lin and liner L lnr .After the switch Sw is closed, the capacitive storage discharges through the plasma jumper of the POS to the inductive storage L 0 and the electric energy C 0 /2 transforms into the magnetic energy L 0 /2 (storage mode with the duration t st ≈ 1 μs). Under certain con ditions, the POS resistance abruptly increases and the current is switched to the load (current switching mode with the duration t sw ≈ 100 ns).Typical forms of oscillograms of the current in the inductive storage I 0 , current in the load I l , and voltage U pos across the POS are shown in Fig. 1b. As was shown in experiments in [2], an external magnetic field prevents a repeated POS closure and allows the voltage across the load to be held for ~1 μs.After the current switching, the liner supply circuit is inductive (Fig. 2a) with the current I l and the energy that can be supplied to the liner being W lnr = (L 0 + L lin + L lnr ) /2. In this case, the energy of an external (with 2 0 U 2 0 I I l 2 respect to the liner) circuit must be the main energy source, i.e., L 0 + L lin + L lnr ≥ 10 L lnr .( 1 )A typical oscillogram of the liner current I l that includes the current switching mode t sw and the liner compression mode t comp , when the stored energy is expended for the liner compression, is illustrated in Fig. 2b.Abstract-A modular scheme of a megaampere current pulse generator on the plasma opening switch (POS) basis with insulation of the POS interelectrode gap by a magnetic field created by an external source is pro posed for experiments with wire liners and other applications. The POS is fed from independent modules that are switched on in parallel. On the basis of an ИК 50 3 (50 kV, 3 μF) capacitor, a supply module with a cur rent through the equivalent part of the POS of up to 200 kA is designed and tested. The limiting POS param eters and the maximum permissible number of modules are determined, and circuit designs of the basic units of the generator are presented.

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Section: Circuit Diagram Of the Generator And Calculation Of Its Paramentioning

confidence: 99%

Section: Circuit Diagram Of the Generator And Calculation Of Its Paramentioning

confidence: 99%

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A scheme of a modular plasma-opening-switch-based generator of megaampere currents for experiments with Z-pinches

et al. 2013

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“…The total duration of the current pulse is ~40 µ s. In order to transmit such a long current pulse, we proposed filling the POS gap with plasma according to the program, i.e., injecting additional plasma as it undergoes erosion [2]. It was proposed in [3] that an isolating spark-gap switch be used between POS1 and the load (POS2) in order to increase the efficiency of the energy transfer to the liner.…”

Section: Introductionmentioning

confidence: 99%

“…A multimodular POS design was proposed in [3] for reducing the charge density transmitted through the POS. The design of the six-module POS of the MOL facility is shown in Fig.…”

Section: Introductionmentioning

confidence: 99%

Prototype of the 1/6 MOL Module of a Superpower Pulse Generator

et al. 2005

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This paper considers problems related to the creation (as part of the Baikal Program) of a superpower pulse generator intended for inertial confinement fusion applications and having pulse parameters of ~ 10 MV, ~ 50 MA, and ~150 ns. A MOL facility (3.7 MA, 5 MV, and 150 ns) with a six-module plasma opening switch (POS), operating as an output pulse compression stage, is being developed to test the circuit solutions of this generator. The design for the prototype of one POS module, referred to as the 1/6 MOL test bench, is presented. The results from experimental tests related to POS performance within the MOL facility are reported.

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Microsecond plasma opening switches in externally applied magnetic field

Dolgachev

Ushakov

2006

IEEE Trans. Plasma Sci.

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Synchronization of parallel-connected plasma opening switches and switching the current to the load

Cited by 3 publications

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A scheme of a modular plasma-opening-switch-based generator of megaampere currents for experiments with Z-pinches

A scheme of a modular plasma-opening-switch-based generator of megaampere currents for experiments with Z-pinches

Prototype of the 1/6 MOL Module of a Superpower Pulse Generator

Microsecond plasma opening switches in externally applied magnetic field

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