The Decade High Power Generator

Sincerny, P.; Ashby, S.; Childers, K.; Deeney, C.; Schlitt, L.

doi:10.1109/ppc.1993.514063

Cited by 14 publications

(4 citation statements)

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“…Several groups have consequently investigated this condition. Sincerny could not find a significant effect of the level of de-aeration of water [92]. This result agrees with our own observations for submicrosecond pulses (see figure 5) but is unexpected in that it apparently contradicts the hypothesis of pre-existing bubblemediated breakdown.…”

Section: Dissolved Gassupporting

confidence: 89%

“…Conversely, Sincerny found a weak linear increase in the dielectric strength from 217 to 237 kV cm −1 for an increase in pressure by 30 psi for water, stressed with a 1 − cos ωt pulse with an 63% effective time of 3 µs. However, there was a standard deviation of about 10-15 kV cm −1 for each measurement [92]. Jones and Kunhardt concluded that for this kind of extended pulse duration, an initial bubble is formed by local or volume heating close to one electrode [93].…”

Section: Hydrostatic Pressurementioning

confidence: 93%

See 1 more Smart Citation

Streamers in water and other dielectric liquids

Kolb¹,

Joshi²,

Xiao³

et al. 2008

J. Phys. D: Appl. Phys.

230

157

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Experimental results on the inception and propagation of streamers in water generated under the application of high electric fields are reviewed. Characteristic parameters, such as breakdown voltage, polarity of the applied voltage, propagation velocities and other phenomenological features, are compared with similar phenomena in other dielectric liquids and in gases. Consequently, parameters that are expected to influence the development of streamers in water are discussed with respect to the analogous well-established models and theories for the related mechanisms in gases. Most of the data support the notion that an initial low-density nucleation site or gas-filled bubble assists the initiation of a streamer. Details of this theory are laid out explaining the observed differences in the breakdown originating from the anode versus the cathode locations. The mechanisms can also be applied to streamer propagation, although some observations cannot be satisfactorily explained.

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Section: Dissolved Gassupporting

confidence: 89%

Section: Hydrostatic Pressurementioning

confidence: 93%

Streamers in water and other dielectric liquids

Kolb¹,

Joshi²,

Xiao³

et al. 2008

J. Phys. D: Appl. Phys.

230

157

View full text Add to dashboard Cite

show abstract

“…The convolute is assumed to be a 3-level version of the double-post-hole convolute described in Refs. [108][109][110][111][112][113][114][115][116][117].…”

Section: A Descriptionmentioning

confidence: 99%

“…These include SHIVA [1], Proto II [2 -5], SuperMITE [5,6], Double EAGLE [7], Saturn [8,9], Angara 5 [10,11], Pegasus II [12 -14], MAGPIE [15], Zebra [16,17], Atlas [18,19], Decade Quad [20,21], Z [22 -31], and COBRA [32]. These machines have been used for a wide variety of inertial-confinementfusion (ICF), radiation-physics, equation-of-state, plasma-physics, astrophysics, and other high-energy-density-physics experiments.…”

Section: Introductionmentioning

confidence: 99%

Architecture of petawatt-classz-pinch accelerators

Stygar

Cuneo

Headley³

et al. 2007

Phys. Rev. ST Accel. Beams

215

128

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We have developed an accelerator architecture that can serve as the basis of the design of petawatt-class z-pinch drivers. The architecture has been applied to the design of two z-pinch accelerators, each of which can be contained within a 104-m-diameter cylindrical tank. One accelerator is driven by slow ( 1 s) Marx generators, which are a mature technology but which necessitate significant pulse compression to achieve the short pulses ( 1 s) required to drive z pinches. The other is powered by linear transformer drivers (LTDs), which are less mature but produce much shorter pulses than conventional Marxes. Consequently, an LTD-driven accelerator promises to be (at a given pinch current and implosion time) more efficient and reliable. The Marx-driven accelerator produces a peak electrical power of 500 TW and includes the following components: (i) 300 Marx generators that comprise a total of 1:8 10 4 capacitors, store 98 MJ, and erect to 5 MV; (ii) 600 water-dielectric triplate intermediate-store transmission lines, which also serve as pulse-forming lines; (iii) 600 5-MV laser-triggered gas switches; (iv) three monolithic radial-transmission-line impedance transformers, with triplate geometries and exponential impedance profiles; (v) a 6-level 5.5-m-diameter 15-MV vacuum insulator stack; (vi) six magnetically insulated vacuum transmission lines (MITLs); and (vii) a triple-post-hole vacuum convolute that adds the output currents of the six MITLs, and delivers the combined current to a z-pinch load. The accelerator delivers an effective peak current of 52 MA to a 10-mm-length z pinch that implodes in 95 ns, and 57 MA to a pinch that implodes in 120 ns. The LTD-driven accelerator includes monolithic radial transformers and a MITL system similar to those described above, but does not include intermediate-store transmission lines, multimegavolt gas switches, or a laser trigger system. Instead, this accelerator is driven by 210 LTD modules that include a total of 1 10 6 capacitors and 5 10 5 200-kV electrically triggered gas switches. The LTD accelerator stores 182 MJ and produces a peak electrical power of 1000 TW. The accelerator delivers an effective peak current of 68 MA to a pinch that implodes in 95 ns, and 75 MA to a pinch that implodes in 120 ns. Conceptually straightforward upgrades to these designs would deliver even higher pinch currents and faster implosions.

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Nanosecond-range multi-pulses synchronization based on magnetic switch and saturable pulse transformer

Liu

Fan

2012

Review of Scientific Instruments

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Magnetic switch has been widely used in the field of pulsed power system for its advantages of solid state, high repetition rate, and long lifetime. In this paper, the synchronization of ns-range multi-pulses based on magnetic switch is studied and two kinds of technical methods are proposed. One of which is based on magnetic switches on a communal magnetic core. It was proved that the synchronization accuracy of 3 pulses is about 2 ns. Another proposed method is ns-range multi-pulse synchronization based on saturable pulse transformer and the experimental result showed that the synchronization accuracy of 2 pulses could achieve 2.5 ns. In contrast to other multi-pulse synchronization methods controlled by high-voltage pulse trigger or laser trigger, the synchronization based on magnetic switch and saturable pulse transformer has the advantages of high synchronization accuracy, long lifetime, and exemption from external trigger signals.

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The Decade High Power Generator

Cited by 14 publications

References 0 publications

Streamers in water and other dielectric liquids

Streamers in water and other dielectric liquids

Architecture of petawatt-classz-pinch accelerators

Nanosecond-range multi-pulses synchronization based on magnetic switch and saturable pulse transformer

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