MAIZE: a 1 MA LTD-Driven Z-Pinch at The University of Michigan

Gilgenbach, R. M.; Gómez, M. R.; Zier, J. C.; Tang, Wilkin; French, David M.; Lau, Y. Y.; Mazarakis, M.G.; Cuneo, M. E.; Johnston, Mark D.; Oliver, B.V.; Mehlhorn, T. A.; Kim, A. A.; Sinebryukhov, V.A.

doi:10.1063/1.3079742

Cited by 38 publications

(14 citation statements)

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“…Wire-array Z-pinches are of great interest to the scientific community due to the ease with which they produce high-energy-density plasmas on university scale pulsed power machines [1][2][3][4] and the high efficiency with which they generate >100TW x-ray pulses on the highest power generators. 5 The most prominent application of high power x-ray sources is inertial confinement fusion (ICF).…”

Section: Introductionmentioning

confidence: 99%

Plasma density measurements in tungsten wire-array Z-pinches

et al. 2012

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Measurements of the plasma density profile near the exploding wires in 1 MA tungsten (W) wirearray Z-pinches have been made using calibrated x-ray absorption. As many as 5 x-ray images per pulse were obtained between 65 and 160 ns after the start of the 100 ns rise time current pulse. Measured W ion densities range from above 10 19 =cm 3 close to the wire to $10 17 =cm 3 about 1 mm away from the wire in the plasma stream. After accurate geometrical registration of the individual wires in each successive image in a pulse using the Genetic Algorithm, the temporal evolution of the axial modulation wavelength distribution of the ablation rate from the wires in each array and the global mass-ablation rate as a function of time are presented. V C 2012 American Institute of Physics. [http://dx.

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Section: Introductionmentioning

confidence: 99%

Plasma density measurements in tungsten wire-array Z-pinches

et al. 2012

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“…This difference is a topic of ongoing research, but is believed to be a result of load dynamics given the exceptional reproducibility of the LTD itself. 16 A sample laser shadowgraphy image of an ablated foil at a peak current of 0.6-MA is shown in Fig. 4.…”

Section: Resultsmentioning

confidence: 99%

“…16 This machine was designed and initially constructed at the Institute of High Current Electronics in Tomsk, Russia. The LTD transmitted power to the plasma physics experiment by a radial magnetically insulated transmission line (MITL) that transformed to a stripline at the load region as shown in Figs.…”

Section: Experimental Configurationmentioning

confidence: 99%

Magneto-Rayleigh-Taylor experiments on a MegaAmpere linear transformer driver

et al. 2012

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Experiments have been performed on a nominal 100 ns rise time, MegaAmpere (MA)-class linear transformer driver to explore the magneto-Rayleigh-Taylor (MRT) instability in planar geometry. Plasma loads consisted of ablated 400 nm-thick, 1 cm-wide aluminum foils located between two parallel-plate return-current electrodes. Plasma acceleration was adjusted by offsetting the position of the foil (cathode) between the anode plates. Diagnostics included double-pulse, sub-ns laser shadowgraphy, and machine current B-dot loops. Experimental growth rates for MRT on both sides of the ablated aluminum plasma slab were comparable for centered-foils. The MRT growth rate was fastest (98 ns e-folding time) for the foil-offset case where there was a larger magnetic field to accelerate the plasma. Other cases showed slower growth rates with e-folding times of about $106 ns. An interpretation of the experimental data in terms of an analytic MRT model is attempted.

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“…16. This single-cavity LTD system is the Michigan Accelerator for Inductive Z-pinch Experiments (MAIZE) at the University of Michigan (UM) [29]. The low L and large C is achieved by distributing many small and fast capacitors and switches around the perimeter of the 3-m-diameter machine.…”

Section: Introduction To Linear Transformer Drivers (Ltds)mentioning

confidence: 99%