Microsecond plasma opening switches in externally applied magnetic field

Dolgachev, G. I.; Ushakov, A.G.

doi:10.1109/tps.2005.863570

Cited by 5 publications

(4 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In accordance with [2,3], the radial gap between the electrodes of each POS is ΔR = 2.5 cm, the induction of the external quasi stationary magnetic field, which is created by a foreign source is В Z = 6-8 kG; this field is produced by two oppositely connected solenoids 7. High voltage electrode 5 is made of ~5 mm thick cop per, thus allowing separation of the magnetic fields that are created in the gaps of the outer and inner POSs.…”

Section: Electronics and Radio Engineeringmentioning

confidence: 89%

“…A one capacitor based supply module contains capacitor 2 and six 50 Ω КВИ 110 cables, which connect it through three channel spark gap 3 to three lead ins 8 of high voltage electrode 5. The most efficient scheme of a POS with an external magnetic field is used [2,3]. The technique for its calculation and matching to the liner is presented in [4,5].…”

Section: Scheme Of a Pos Based Generator With An External Magnetic Fieldmentioning

confidence: 99%

See 1 more Smart Citation

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

et al. 2013

View full text Add to dashboard Cite

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.

show abstract

Section: Electronics and Radio Engineeringmentioning

confidence: 89%

Section: Scheme Of a Pos Based Generator With An External Magnetic Fieldmentioning

confidence: 99%

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

et al. 2013

View full text Add to dashboard Cite

show abstract

“…Experiments of this type were performed on the model [3]. The wire resistance dynamics was studied at different values of the load inductance and magnetic field in the absence of a vacuum gap.…”

Section: Experiments With a Low Inductance Loadmentioning

confidence: 99%

“…The program of the development of ultrahigh power generators for experiments in the field of iner tial controlled thermonuclear fusion (the MOL facility in the Baikal program [1], magnetic explosion gener ators [2]) suggests using a plasma current source (POS) in an external magnetic field, which is a longi tudinal magnetic field created by an external source [3]. The POS consists of two coaxial electrodes that are included in the circuit of an inductive storage.…”

Section: Introductionmentioning

confidence: 99%

Filling the gap of a plasma opening switch with plasma from an electroexploding wire in an external magnetic field

et al. 2013

View full text Add to dashboard Cite

The dynamics of filling the interelectrode gap of a plasma opening switch (POS) using an electroex ploding wire with a diameter of 4 µm (tungsten) and 6 µm (carbon) is considered. The wire was connected to coaxial electrodes of the POS perpendicular to the force lines of a longitudinal magnetic field, which was cre ated by an external source. When a current was transmitted through the wire, the longitudinal speed of produced plasma was ≈10 6 cm/s, and the azimuthal speed was ≈10 7 cm/s (for tungsten) and ≥1.3 × 10 7 cm/s (for carbon). As a result, a plasma "washer" was formed and the total quantity of particles in it was determined by the parameters of the wire and the POS gap. This result is the first step in a solution of "the first shot" problem.

show abstract

High-Voltage Closing Switches Using Vacuum Electric Breakdown for Pulsed-Power Applications

Dolgachev

Ushakov

2007

IEEE Trans. Plasma Sci.

View full text Add to dashboard Cite

Microsecond plasma opening switches in externally applied magnetic field

Cited by 5 publications

References 30 publications

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

Filling the gap of a plasma opening switch with plasma from an electroexploding wire in an external magnetic field

High-Voltage Closing Switches Using Vacuum Electric Breakdown for Pulsed-Power Applications

Contact Info

Product

Resources

About