Projectile

About: Projectile is a research topic. Over the lifetime, 13047 publications have been published within this topic receiving 115563 citations.

Target scoring and display system and method

Abstract: An automatic target shooting system for determining projectile location relative to a target, calculating a score based upon the location, and displaying a replica of the target with an indication of the location of the projectile relative to the target and the score. A target support structure defines a target area with criss-crossing X-Y-type coordinate light beams extending thereacross between light emitter devices and light receiving devices which generate output signals indicative of the location of a projectile during passage through the target area. The output signals are utilized by a computer device to identify the location of the projectile relative to the target, and to score the shot in accordance with the location. A replica of the target is displayed on a CRT screen with an indication of the location of the shot thereon and the score for the shot.

Method of making a projectile by metal injection molding

Abstract: The present invention provides a method of making a metal ammunition projectile by metal injection molding comprising the steps of: providing a projectile mold to form a nose extending essentially symmetrically to a shoulder; and an essentially cylindrical bearing surface extending from the shoulder to a base; providing a metal injection molding feedstock comprising a powdered metal and a first binding agent and a second binding agent; injection molding the metal injection molding feedstock into the projectile mold to form a first projectile having a first size; debinding the first projectile to remove the first binding agent; and sintering the first projectile to remove the second binding agent and form a projectile having a second size.

Shaped-charge projectile having an amorphous-matrix composite shaped-charge liner

Abstract: A shaped-charge projectile includes a container in the form of a hollow shell elongated parallel to a projectile axis, with the container having a front end and a back end. A shaped-charge liner is within the container and adjacent to the front end of the container. The shaped-charge liner is a composite material of fibers or particles of a solid reinforcement dispersed in a solid amorphous matrix. An explosive charge is positioned between the shaped-charge liner and the back end of the container. The shaped-charge liner is preferably prepared by infiltration or casting, and assembled with the other elements to make the shaped-charge projectile.

Comprehensive analysis of the stopping power of antiprotons and negative muons in He and gas targets

Abstract: A comprehensive analysis of the stopping power of antiprotons and negative muons in He and gas targets for projectile velocities (equivalent antiproton energies) ranging from about 0.1 to 10 au (0.25 keV to 2.5 MeV) is performed. Recent experimental data are contrasted with theoretical results obtained from different approaches. The electronic stopping power is evaluated within the coupled-state atomic-orbital method and the distorted-wave Born approximation as well as, for low projectile velocities, within a generalized adiabatic-ionization model that takes into account collisional-broadening effects. The departure of the antiproton stopping power from the proton stopping power (`Barkas effect'), observed for intermediate projectile velocities, is discussed. The contribution to the stopping power arising from energy transfer to the translational degrees of freedom of the target system (`nuclear stopping') is evaluated. Our analysis results in a good understanding of the stopping mechanisms of negative heavy particles in gases, in particular in He. Discrepancies between theory and experiment in the case are attributed to effects of the molecular structure of the target.

The separation techniques for secondary beams

Abstract: In-flight separation of unretarded nuclear reaction products has made considerable progress in recent years. Electromagnetic separators for exotic species produced by nuclear fission, heavy ion fusion, target spallation, or projectile fragmentation have been developed to separate isotopes over the whole periodic table of elements with energies up to the GeV/u range. Recently, the possibility to produce exotic nuclear beams with energies far above the Coulomb barrier by projectile fragmentation opened a new field of secondary beam physics, the direct use of isotopically separated beams of unstable nuclei for nuclear reactions. Characteristic examples of in-flight separation will be discussed with emphasis on the new generation of projectile fragment separators, including the future application of cooled and stored secondary beams for the application in nuclear physics.