Plasma opening switch-load coupling on ACE 4

Thompson, J.; Coleman, P.L.; Crumley, R.; Goodrich, P.J.; Goyer, J.R.; Rauch, J.; Moschella, J.J.; Yadlowsky, E. J.

doi:10.1109/beams.1998.822449

Cited by 2 publications

(3 citation statements)

References 2 publications

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“…The presence of a high density plasma sheath just downstream of the 3cm POS A-K gap, at a time when current appears at B-dots located at the same axial position but at significantly larger radii [6]. The observation of near simultaneous appearance of current at different outer radii just downstream of the 0 * Work supported by the Defense Threat Reduction Agency POS significantly prior to the observation of current in the downstream load.…”

Section: Two Region Pos Opening Modelmentioning

confidence: 99%

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DECADE Quad monolithic POS development on ACE 4 [pulsed power plasma opening switch]

Thompson

Coleman²,

Crumley³

et al.

Digest of Technical Papers. 12th IEEE International Pulsed Power Conference. (Cat. No.99CH36358)

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Section: Two Region Pos Opening Modelmentioning

confidence: 99%

“…The key concept for I,*Tc scaling, the preservation of the opening phase initial conditions, has both experiment and theoretical support [3]. The DQ prototype coaxial POS uses a 9 cm radius cathode, a 3 cm A-K gap, and has a nominal 20cm length.…”

mentioning

confidence: 99%

DECADE Quad monolithic POS development on ACE 4 [pulsed power plasma opening switch]

Thompson

Coleman²,

Crumley³

et al.

Digest of Technical Papers. 12th IEEE International Pulsed Power Conference. (Cat. No.99CH36358)

Self Cite

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“…11,12 PEOSs will often exhibit some flow switch behaviour, as the eroding plasma channel will be, to some extent, swept along the power feed by the J Â B force. [13][14][15] Plasma switches have been successful at sharpening generator current profiles, although the operation tends to become lossy at high voltages and currents.…”

Section: Introductionmentioning

confidence: 99%

Characterisation of the current switch mechanism in two-stage wire array Z-pinches

et al. 2015

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In this paper, we describe the operation of a two-stage wire array z-pinch driven by the 1.4 MA, 240 ns rise-time Magpie pulsed-power device at Imperial College London. In this setup, an inverse wire array acts as a fast current switch, delivering a current pre-pulse into a cylindrical load wire array, before rapidly switching the majority of the generator current into the load after a 100–150 ns dwell time. A detailed analysis of the evolution of the load array during the pre-pulse is presented. Measurements of the load resistivity and energy deposition suggest significant bulk heating of the array mass occurs. The ∼5 kA pre-pulse delivers ∼0.8 J of energy to the load, leaving it in a mixed, predominantly liquid-vapour state. The main current switch occurs as the inverse array begins to explode and plasma expands into the load region. Electrical and imaging diagnostics indicate that the main current switch may evolve in part as a plasma flow switch, driven by the expansion of a magnetic cavity and plasma bubble along the length of the load array. Analysis of implosion trajectories suggests that approximately 1 MA switches into the load in 100 ns, corresponding to a doubling of the generator dI/dt. Potential scaling of the device to higher current machines is discussed.

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Plasma opening switch-load coupling on ACE 4

Cited by 2 publications

References 2 publications

DECADE Quad monolithic POS development on ACE 4 [pulsed power plasma opening switch]

DECADE Quad monolithic POS development on ACE 4 [pulsed power plasma opening switch]

Characterisation of the current switch mechanism in two-stage wire array Z-pinches

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