A compact strip-line pulsed power generator for isentropic compression experiments

Ao, T.; Chantrenne, S.; Baer, M.R.; Hall, C.A.

doi:10.1063/1.2827509

Cited by 71 publications

(32 citation statements)

References 46 publications

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“…The techinques to realize magnetically driven quasi-isentropic compression are based on all kinds of pulsed power generators, such as ZR, Veloce [29] , Saturn [30] facilities. As shown in , where J is the current per unit width.…”

Section: Magnetically Driven Quasi-isentropic Compressionmentioning

confidence: 99%

Magnetohydrodynamics of Metallic Foil Electrical Explosion and Magnetically Driven Quasi-Isentropic Compression

Wang¹,

Zhao²,

Bin³

et al. 2011

Hydrodynamics - Advanced Topics

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Hydrodynamics -Advanced Topics 348 compression was firstly presented by J.R. Asay at Sandia National Laboratory [10] . In last decade, this planar loading technique had being developed fastly and accepted by many researchers in the world, such as France [11] , United Kingdom [12] ,and China [13] . As J.R. Asay said, it will be a new experimental technique widely used in shock dynamics, astrophysics, high energy density physics, material science and so on. The process of magnetically driven quasi-isentropic compression is typical magnetodynamics [14] , which refers to dynamic compression, magnetic field diffusion, heat conduction and so on. As described above, the electrical explosion of metallic foil and magnetically driven quasiisentropic compression is typically magnetohydrodynamic problem. Although it develops fastly and maybe many difficulties and problems exist in our work, we present our important and summary understanding and results to everyone in experiments and simulations of electrical explosion of metallic foil and magnetically driven quasi-isentropic compression in last decade. In the following discussions, more attentions are paid to the physical process, the experimental techniques and simulation of electrical explosion of metallic foil and magnetically driven quasi-isentropic compression.

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Section: Magnetically Driven Quasi-isentropic Compressionmentioning

confidence: 99%

Magnetohydrodynamics of Metallic Foil Electrical Explosion and Magnetically Driven Quasi-Isentropic Compression

Wang¹,

Zhao²,

Bin³

et al. 2011

Hydrodynamics - Advanced Topics

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“…Typically, they are low inductance designs that transfer current to strip-line loads to maximize magnetic pressure. As of this writing, machines such as GEPI and Veloce produce currents of 3-4 MA over a near linear rise time of approximately 500 ns [5,6]. In the case of Veloce, this provides a capability of performing shockless compression up to a peak pressure of ∼20 Gpa.…”

Section: Introductionmentioning

confidence: 99%

Pulsed power accelerator for material physics experiments

Reisman

Stoltzfus

Stygar

et al. 2015

Phys. Rev. ST Accel. Beams

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We have developed the design of Thor: a pulsed power accelerator that delivers a precisely shaped current pulse with a peak value as high as 7 MA to a strip-line load. The peak magnetic pressure achieved within a 1-cm-wide load is as high as 100 GPa. Thor is powered by as many as 288 decoupled and transittime isolated bricks. Each brick consists of a single switch and two capacitors connected electrically in series. The bricks can be individually triggered to achieve a high degree of current pulse tailoring. Because the accelerator is impedance matched throughout, capacitor energy is delivered to the strip-line load with an efficiency as high as 50%. We used an iterative finite element method (FEM), circuit, and magnetohydrodynamic simulations to develop an optimized accelerator design. When powered by 96 bricks, Thor delivers as much as 4.1 MA to a load, and achieves peak magnetic pressures as high as 65 GPa. When powered by 288 bricks, Thor delivers as much as 6.9 MA to a load, and achieves magnetic pressures as high as 170 GPa. We have developed an algebraic calculational procedure that uses the single brick basis function to determine the brick-triggering sequence necessary to generate a highly tailored current pulse time history for shockless loading of samples. Thor will drive a wide variety of magnetically driven shockless ramp compression, shockless flyer plate, shock-ramp, equation of state, material strength, phase transition, and other advanced material physics experiments.

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“…4 Many other examples can be found in a number of worldwide facilities that employ large high-current capacitor banks coupled to a load via strip-lines, with an extreme example being SHIVA STAR. 5 In many of these applications, an important issue is benchmarking the codes used in the complex numerical modelling of the system, which can predict the current distribution inside the transmission line conductors.…”

Section: Introductionmentioning

confidence: 99%

MIDOT: A novel probe for monitoring high-current flat transmission lines

Omar

Novac

Graneau

et al. 2016

Review of Scientific Instruments

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A novel inductive probe, termed MIDOT, was developed for monitoring high-current flat transmission lines. While being inexpensive the probe does not require calibration, is resistant to both shock waves and temperature variations, and it is easy to manufacture and mount. It generates strong output signals that are relatively easy to interpret and has a detection region limited to a pre-defined part of the transmission line. The theoretical background related to the MIDOT probes, together with their practical implementation in both preliminary experimentation and high-current tests, is also presented in the paper. The novel probe can be used to benchmark existing 2D numerical codes used in calculating the current distribution inside the conductors of a transmission line but can also easily detect an early movement of a transmission line component. The probe can also find other applications, such as locating the position of a pulsed current flowing through a thin wire.

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A compact strip-line pulsed power generator for isentropic compression experiments

Cited by 71 publications

References 46 publications

Magnetohydrodynamics of Metallic Foil Electrical Explosion and Magnetically Driven Quasi-Isentropic Compression

Magnetohydrodynamics of Metallic Foil Electrical Explosion and Magnetically Driven Quasi-Isentropic Compression

Pulsed power accelerator for material physics experiments

MIDOT: A novel probe for monitoring high-current flat transmission lines

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