Enhanced hypervelocity launcher - capabilities to 16 km/s

Chhabildas, L.C.; Kmetyk, L.N.; Reinhart, William D.; Hall, C.A.

doi:10.1016/0734-743x(95)99845-i

Cited by 82 publications

(30 citation statements)

References 9 publications

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“…This is accomplished by using graded-density impactors [6][7]151. When this graded-density material is used to impact a flier-plate in a modified two-stage light gas gun, as enhanced by using the experimental configuration described in Figure 1 (b) to allow the launching of titanium and aluminum plates to velocities approaching 16 km/s [16,19]. The experimental design shown in Figure lfb) acts as a dynamic acceleration reservoir which further enhances the flier plate velocity [16].…”

Section: Basic Operationmentioning

confidence: 99%

“…When this graded-density material is used to impact a flier-plate in a modified two-stage light gas gun, as enhanced by using the experimental configuration described in Figure 1 (b) to allow the launching of titanium and aluminum plates to velocities approaching 16 km/s [16,19]. The experimental design shown in Figure lfb) acts as a dynamic acceleration reservoir which further enhances the flier plate velocity [16]. This is the highest mass-velocity capability attained with laboratory launchers to date, and therefore should open up investigations into new regimes of impact physics using various diagnostic tools [ 1-21.…”

Section: Basic Operationmentioning

confidence: 99%

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Time-resolved particle velocity measurements at impact velocities of 10 km/s

Furnish

Chhabildas

Reinhart

1999

International Journal of Impact Engineering

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SUN 3 0 1998Albuquerque, NM 871 85-1 18 1 Hypervelocity launch capabilities (9 -16 M s ) with macroscopic plates have become available in recent years. It is now feasible to conduct instrumented plane-wave tests using this capability. Successfully conducting such tests requires a planar launch and impact at hypervelocities, appropriate triggering' for recording systems, and time-resolved measurements of motion or stress at a particular point or set of points within the target or projectile during impact. We have conducted the first time-resolved wave-profile experiments using velocity interferometric techniques at impact velocities of 10 Ms. These measurements show that aluminum continues to exhibit normal release behavior to 16 1 GPa shock pressure, with complete loss of strength of the shocked state. These experiments have allowed a determination of shock-wave window transparency in conditions produced by a hypervelocity impact. In particular, lithiup fluoride appears to lose transparency at a shock stress of 200 GPa; this appears to be the upper limit for conventional wave profile measurements using velocity interferometric M

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Section: Basic Operationmentioning

confidence: 99%

Section: Basic Operationmentioning

confidence: 99%

Time-resolved particle velocity measurements at impact velocities of 10 km/s

Furnish

Chhabildas

Reinhart

1999

International Journal of Impact Engineering

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“…Samlia has recently developed a cryogenic target capability for studying the deuterium EOS, both on the hypcrvclocity launcher [ 13] and on the Z accelerator. If data can be obtained with an experimental precision of about 1% at these facilities, then the EOS curve for deuterium will be further constrained.…”

Section: Application Experiments In the Strong Coupling Regimementioning

confidence: 99%

The role of strong coupling in z-pinch-driven approaches to high yield inertial confinement fusion

et al. 2000

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Abstract. Peakx-ray powers as high as 280k40 TW have been generated from the implosion of tungsten wire arrays on the Z Accelerator at Sandia National Laboratories. The high x-ray powers radiated by these z-pinches provide an attractive new driver option for high yield inertial confinement fusion (ICF). The high x-ray powers appear to be a result of using a large number of wires in the array which decreases the perturbation seed to the magnetic RayleighTaylor (MRT) instability and diminishes other 3-D effects. Simulations tQ confirm this hypothesis require a 3-D MHD code capability, and associated databases, to follow the evolution of the wires from cold solid through melt, vaporization, ionization, and finally to dense imploded plasma. Strong coupling plays a role in this process, the importance of which depends on the wire material and the current time history of the pulsed power driver. Strong coupling regimes are involved in the plasmas in the convolute and transmission line of the powerflow system. Strong coupling can also play a role in the physics of the z-pinch-driven high yield ICF target. Finally, strong coupling can occur in certain z-pinch-driven application experiments.

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“…Staging methods have been reported whereby a pusher of high shock impedance impacts a stack of target plates in which the impedance decreases from plate to plate in the desired direction of motion (1,2), and velocities up to 14 km/s have been obtained in this manner. Chhabildas and his colleagues at Sandia National Laboratory have reversed this strategy with a graded density pusher, and they have demonstrated velocities up to 15.8 km/s with a 6 mm-diameter × 0.56 mm thick titanium projectile (3). A difficulty with this method is that the loading pulse is applied in a very short period of time and to achieve such a high velocity in this period requires a very high pressure, up to 100 GPa or even more.…”

Section: Introductionmentioning

confidence: 99%

Optimization studies of a three-stage light gas gun

Glenn¹

1998

AIP Conference Proceedings

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L a w r e n c e L i v e r m o r e N a t i o n a l L a b o r a t o r y UCRL-JC-127855Optimization Studies of a Three-Stage Light Gas Gun Lewis A. Glenn June 1997This is a preprint of a paper intended for publication in a journal or proceedings. Since changes may be made before publication, this preprint is made available with the understanding that it will not be cited or reproduced without the permission of the author. PREPRINTThis paper was prepared for submittal to the DISCLAIMER This document was prepared as an account of work sponsored by an agency of the United States Government. Neither the United States Government nor the University of California nor any of their employees, makes any warranty, express or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. Reference herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or favoring by the United States Government or the University of California. The views and opinions of authors expressed herein do not necessarily state or reflect those of the United States Government or the University of California, and shall not be used for advertising or product endorsement purposes. OPTIMIZATION STUDIES OF A THREE-STAGE LIGHT GAS GUN Lewis A. GlennLawrence Livermore National Laboratory, Livermore, California 94550 ABSTRACTA new gasdynamic launcher is described, in which intact projectiles weighing at least 1 gram can be accelerated to mass velocities of 15-20 km/s. The system employs a conventional 2--stage light gas gun, with the barrel modified and filled with helium to act as a pump tube for a third stage. The key feature of the launcher is that the peak pressure in the third stage can be maintained below 2.5 GPa, thus assuring high efficiency and the integrity of the projectile.

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Enhanced hypervelocity launcher - capabilities to 16 km/s

Cited by 82 publications

References 9 publications

Time-resolved particle velocity measurements at impact velocities of 10 km/s

Time-resolved particle velocity measurements at impact velocities of 10 km/s

The role of strong coupling in z-pinch-driven approaches to high yield inertial confinement fusion

Optimization studies of a three-stage light gas gun

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