Topic
Projectile
About: Projectile is a research topic. Over the lifetime, 13047 publications have been published within this topic receiving 115563 citations.
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02 Dec 1998-Nuclear Instruments & Methods in Physics Research Section B-beam Interactions With Materials and Atoms
TL;DR: In this article, the stopping power curves of light and heavy ions in C and Si have been constructed over the energy interval of E/M ∼ 0.01 −100 MeV/amu by combining experimental data at low and high energies.
Abstract: Electronic stopping power curves of light and heavy ions in C and Si have been constructed over the energy interval of E/M ∼0.01–100 MeV/amu by combining experimental data at low and high energies. An excellent fit is obtained by an analytical expression approximating the asymptotic laws at high and low velocities and interpolating the range in between. The coefficients of this polynomial function obey simple monotonic dependencies on the atomic number of the projectile, so that the stopping power of any projectile in C and Si can be predicted over the whole energy interval with a precision of 10% or better. These results will be compared to the data provided by TRIM95.
43 citations
TL;DR: In this article, the authors investigated the effect of cover plate and confinement on failure mechanisms of the target and found that cover plate is more effective to reduce the damage of the support plate compared to the confinement.
43 citations
TL;DR: In this article, the authors examined the question of where in the railgun accelerator circuit is the seat of the recoil force and explained that conventional electromagnetic field theory and the older Ampere electrodynamics disagree on this point.
Abstract: This paper examines the question of where in the railgun accelerator circuit is the seat of the recoil force. It is explained that conventional electromagnetic field theory and the older Ampere electrodynamics disagree on this point. The former places the recoil force in the remote gun breach while the latter claims it resides in the railheads close to the projectile. An experiment is described which tends to confirm the Ampere prediction. The second part of the paper deals with the force distribution along the projectile branch of the accelerator. Finite current‐element analysis has been employed to show that both theories give approximately the same acceleration force distribution and that the total acceleration force furnished by them agrees well with an experimental check. However, according to the Ampere law, the projectile branch of the circuit should also be subject to strut compression and not only to transverse acceleration. This aspect of the Ampere electrodynamics still awaits experimental confirmation.
43 citations
TL;DR: In this paper, the authors investigate the ejection process of molecules from a benzene crystal bombarded with keV large Ar clusters and investigate the effect of projectile size, the kinetic energy and the impact angle on the sputtering efficiency.
Abstract: Molecular dynamics computer simulations are used to investigate the ejection process of molecules from a benzene crystal bombarded with keV large Ar clusters. The effect of projectile size, the kinetic energy and the impact angle on the sputtering efficiency is investigated. The results show that although the sputtering yield depends on all projectile parameters, this dependence can be greatly simplified if the sputtering yield per projectile nucleon is expressed as a function of projectile kinetic energy per nucleon. A different dependence of the total sputtering yield on the impact angle has been observed for small and large projectiles. This effect is attributed to a ‘washing out’ mechanism. For large projectiles most of the organic molecules are ejected by gentle collective action of argon atoms. Proper selection of the projectile parameters allows for achieving conditions where only intact molecules are emitted. Copyright © 2012 John Wiley & Sons, Ltd.
42 citations
Patent•
10 Aug 1973
TL;DR: In this paper, a canard frame and a main housing are used to provide correction on the trajectory of a conventional gun-firing projectile by substituting for the standard fuze thereof, with the main housing being rotatable with respect to the main frame and having deflectable canards.
Abstract: Control is provided to conventional gun-fired projectiles by substituting for the standard fuze thereof a device comprising a canard frame and a main housing, which threads into the fuze well of the projectile, with the canard frame being rotatable with respect to the main housing and having deflectable canards thereon for providing vernier correction on the trajectory to the projectile.
42 citations