GEPI: a compact pulsed power driver for isentropic compression experiments and for non shocked high velocity flyer plates

Avrillaud, G.; Courtois, L.; Guerre, J.; Héreil, Pierre‐Louis; Lassalle, F.; Bayol, F.; L’Eplattenier, P.; Kovalchuck, B.; Kumpjak, E.V.; Zoi, N.V.; Kim, A.

doi:10.1109/ppc.2003.1277959

Cited by 9 publications

(6 citation statements)

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“…Smaller capacitor banks have been designed specifically for smaller-scale ICE experiments, e.g., [6,9], and these may reach pressures of the order of 50 GPa in approximately 500 ns, but even these machines are relatively expensive to manufacture. The explosive techniques can be used to produce ICE data at comparable or greater pressures than those on the Z-machine [11].…”

Section: Comparison Of Techniquesmentioning

confidence: 99%

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A simple machine for isentropic compression experiments (ICE)

Tasker¹,

Mielke²,

Rodriguez³

et al. 2012

AIP Conference Proceedings

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Abstract.A single-turn magnet pulsed power system, at the Los Alamos National Laboratory (LANL) National High Magnetic Field Laboratory (NHMFL), was originally designed to measure actinide samples in extremes of high magnetic field (to 300 Tesla) [1,2]. A simple modification to the system has converted it to a fast turnaround, inexpensive, magnetic system for Isentropic Compression Experiments (ICE). For the design and predictions of performance of the NHMFL-ICE experiment a circuit code simulation was chosen to model all aspects of the experiment, electrical and physical. This paper describes the potential performance of the system, recent experiments, and plans for a portable system. The 2.2 µs rise time of the system allows sample thicknesses up to ~5 mm. With the present design the maximum stresses are ~50GPa (0.5 Mbar) at the maximum bank voltage of 60 kV.

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Section: Comparison Of Techniquesmentioning

confidence: 99%

“…ICE experiments are performed by depositing mega-ampere currents of ca. 1 µs rise time from fast capacitor banks [4][5][6][7][8][9] or by using high explosive techniques [3,10].…”

Section: Introductionmentioning

confidence: 99%

A simple machine for isentropic compression experiments (ICE)

Tasker¹,

Mielke²,

Rodriguez³

et al. 2012

AIP Conference Proceedings

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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: 97%

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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“…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.…”

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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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GEPI: a compact pulsed power driver for isentropic compression experiments and for non shocked high velocity flyer plates

Cited by 9 publications

References 1 publication

A simple machine for isentropic compression experiments (ICE)

A simple machine for isentropic compression experiments (ICE)

Pulsed power accelerator for material physics experiments

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

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