Time dependent imaging of cylindrical shocks at the Pegasus facility

King, N.S.P.; Sorenson, D. S.; Obst, A. W.; Gray, N. B.; Holmes, V.H.; Jaramillo, S. A.; Yates, George J.; Picklesimer, A.; Platts, D.; Stokes, John; Hockaday, Mary Yvonne P.; Coulter, W.L.; Oona, H.; Findley, C.; Adams, P. J.; Guzik, Joyce A.; Lund, C.M.; Bowers, R.L.; Malone, Brendan; Watts, Phillip W.; Flurer, R. L.; Frogget, Brent C.; Westley, D. T.; Peterson, Kyle; Pritchett, R.L.; Malson, D.; Crain, D.J.; Jones, Phil; Ley, M.; Hedges, Samuel

doi:10.1109/ppc.1995.599746

Cited by 2 publications

(1 citation statement)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Results from an optical framing camera, 14 which had a 370 s resolution, were used to assess the structure of the electrode-liner contact during the implosion. The data showed clear evidence of liner material having been laid down along the glide planes behind the liner as it imploded in good agreement with the 2D calculations.…”

Section: Comparison With Experimental Datamentioning

confidence: 99%

Design and modeling of precision solid liner experiments on Pegasus

Bowers

Brownell

Lee

et al. 1998

Journal of Applied Physics

View full text Add to dashboard Cite

Pulsed power driven solid liners may be used for a variety of physics experiments involving materials at high stresses. These include shock formation and propagation, material strain-rate effects, material melt, instability growth, and ejecta from shocked surfaces. We describe the design and performance of a cylindrical solid liner that can attain velocities in the several mm/s regime, and that can be used to drive high-stress experiments. An approximate theoretical analysis of solid liner implosions is used to establish the basic parameters ͑mass, materials, and initial radius͒ of the driver. We then present one-dimensional and two-dimensional simulations of magnetically driven, liner implosions which include resistive heating and elastic-plastic behavior. The two-dimensional models are used to study the effects of electrode glide planes on the liner's performance, to examine sources of perturbations of the liner, and to assess possible effects of instability growth during the implosion. Finally, simulations are compared with experimental data to show that the solid liner performed as predicted computationally. Experimental data indicate that the liner imploded from an initial radius of 2.4 cm to a target radius of 1.5 cm, and that it was concentric and cylindrical to better than the experimental resolution ͑60 m͒ at the target. The results demonstrate that a precision solid liner can be produced for high-stress, pulsed power applications experiments.

show abstract

Section: Comparison With Experimental Datamentioning

confidence: 99%

Design and modeling of precision solid liner experiments on Pegasus

Bowers

Brownell

Lee

et al. 1998

Journal of Applied Physics

View full text Add to dashboard Cite

show abstract

Liner target interaction experiments on Pegasus II

Hockaday

Chrien²,

Bartsch³

et al.

Digest of Technical Papers. Tenth IEEE International Pulsed Power Conference

View full text Add to dashboard Cite

program uses capacitively driven low voltage, inductive-storage pulse power to implode cylindrical targets for hydrodynamics experiments. Once a precision driver liner was characterized an experimental series characterizing the aluminum target dynamics was performed. The target was developed for shock-induced quasi-particle ejecta experiments including holography. The concept for the Liner shock experiment is that the driver liner is used to impact the target liner which then accelerates toward a collimator with a slit in it. A shock wave is set up in the target liner and as the shock emerges from the back side of the target liner, ejecta are generated. By taking a laser hologram the particle distribution of the ejecta are hoped to be determined. The goal for the second experimental series was to characterize the target dynamics and not to measure and generate the ejecta. Only the results from the third shot, Pegasus 11-26 fired April 26th, 1994, from the series will be discussed in detail. The second experimental series successfully characterized the target dynamics necessary to move forward towards our planned quasi-ejecta experiments.

show abstract

Time dependent imaging of cylindrical shocks at the Pegasus facility

Cited by 2 publications

References 0 publications

Design and modeling of precision solid liner experiments on Pegasus

Design and modeling of precision solid liner experiments on Pegasus

Liner target interaction experiments on Pegasus II

Contact Info

Product

Resources

About