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Tuesday, July 21, 2020 | History

2 edition of Characterization and magnetic augmentation of a low voltage electromagnetic railgun found in the catalog.

Characterization and magnetic augmentation of a low voltage electromagnetic railgun

by John P. Hartke

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  • 16 Currently reading

Published by Naval Postgraduate School, Available from National Technical Information Service in Monterey, Calif, Springfield, Va .
Written in English


About the Edition

In the near future armored vehicles will be fielded with reactive armor which can not be defeated by today"s chemically propelled munitions. Today"s munitions are limited to muzzle velocities less than the speed of sound in the chemical propellant which is about 1.8 km/s. Electromagnetic launch technologies have the ability to launch projectiles at velocities in excess of 2 km/s and may be able to defeat the reactive armor. Not only can electromagnetic launch technologies be used as an anti-tank weapon but it can also be used as anti-missile defense. To investigate electromagnetic launch technologies and the effects of augmentation a 44 cm railgun was constructed and tested. The railgun was powered by a capacitor bank of fourteen 330 V, 600 micro-F capacitors. The velocity of the projectile, the voltage across the capacitors and the current through the rails were measured. The augmentation of the gun with a permanent magnetic field increased the velocity of the projectile by 85% while air injection augmentation had no effect.

Edition Notes

StatementJohn P. Hartke
ContributionsNaval Postgraduate School (U.S.)
The Physical Object
Paginationix, 42 p. ;
Number of Pages42
ID Numbers
Open LibraryOL25294292M

  This is a magnetic track that shoots a magnetic projectile using the force of magnetism. A rail gun for beginners. Also see the follow up video "How To Build A Magnetic . A railgun is a device, typically designed as a weapon, that uses electromagnetic force to launch high velocity projectiles. The projectile normally does not contain explosives, instead relying on the projectile's high speed and kinetic energy to inflict damage. The railgun uses a pair of parallel conductors, along which a sliding armature is accelerated by the electromagnetic effects of a current that flows down one rail.

Abstract: With the advancement of the electromagnetic (EM) launcher and the idea of the launch of smart equipment by railgun, one cannot ignore the EM compatibility issues of the railgun. Large acceleration values, varying strong magnetic and electric fields and the existence of electric arcs specialized EM launchers. Future applications of railguns include the launch of small satellites or. Exploring Electromagnetic Acceleration of Rail Guns Tyler Rhoades Physics Department, The College of Wooster (Dated: Decem ) A simple rail gun was constructed from a pair of aluminum rods and a cm diameter aluminum ball as the armature. An array of Neodynium magnets was placed under the rails to create a.

Launch to Space With an Electromagnetic Railgun Ian R. McNab, Senior Member, IEEE Abstract— Many advances in electromagnetic (EM) railgun and power supply technology have been made in recent years. Laboratory experiments with railguns have demonstrated muzzle velocities of 2–3 km/s and muzzle energies 8 MJ. The extension. Permanent magnet rail gun (PMRG) Introduction A railgun is a special kind of linear homopolar electric motor used to accellerate projectiles to high speeds, by lorenz forces generated between two parallel static rails and a moving, conductive projectile between them, after the rails are powered with a powerful DC current pulse.


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Characterization and magnetic augmentation of a low voltage electromagnetic railgun by John P. Hartke Download PDF EPUB FB2

To investigate electromagnetic launch technologies and the effects of augmentation a 44 cm railgun was constructed and tested. The railgun was powered by a capacitor bank of fourteen V, Author: John Hartke.

The railgun was powered by a capacitor bank of fourteen V, micro-F capacitors. The velocity of the projectile, the voltage across the capacitors and the current through the rails were measured. The augmentation of the gun with a permanent magnetic field increased the velocity of the projectile by 85% while air injection augmentation had no by: 3.

Not only can electromagnetic launch technologies be used as an anti-tank weapon but it can also be used as anti-missile defense. To investigate electromagnetic launch technologies and the effects of augmentation a 44 cm railgun was constructed and tested.

The railgun was powered by a capacitor bank of fourteen V, micro-F : CHARACTERIZATION AND MAGNETIC AUGMENTATION OF A LOW VOLTAGE ELECTROMAGNETIC RAILGUN John P. Hartke 1/ Captain, United States Army B.S., United States Military Academy, Submitted in partial fulfillment of the requirements for the degree of MASTER OF SCIENCE IN PHYSICS from the NAVAL POSTGRADUATE SCHOOL December ABSTRACT In.

Enter the password to open this PDF file: Cancel OK. File name:. [3] John, P. Hartke, Characterization and Magnetic Augmentation of a Low Voltage electromagnetic Rail gun, Naval Postgraduate School Monterey California, [4] Nicu, M., Vasile, T., A Mathematical Model of the Projectile Motion in the Electromagnetic Rail gun, The.

Through the armature magnetic field measurement of different position, conduing to analyze and understand changes of armature magnetic field in electromagn Electromagnetic railgun armature magnetic field measurement and analysis based on B-Dot probe signal - IEEE Conference Publication.

To investigate electromagnetic launch technologies and the effects of augmentation a 44 cm railgun was constructed and tested. The railgun was powered by a capacitor bank of fourteen V, Publisher Summary. The measurement of magnetic fields is needed at all points in the experimental characterization of magnetic materials.

A classical way to reveal and measure a magnetic field is by means of a closed-loop winding, where an electromotive force is detected, according to the Faraday–Maxwell law of electromagnetic induction, proportional to the time derivative of the linked flux.

recorded muzzle voltage. long as possible during the launching process. One way to reduce the heat load magnetic field augmentation, it is possible to compensate a some known magnetic field augmentation techniques and describe an augmentation with a rather strong magnetic. Introduction. The electromagnetic railgun (EMG) is composed of rails, armature, insulators and containment.The armature can be sped up to 2 km/s by feeding the exciting current to the breech of railgun.However, ablation occurs frequently on the rails during experiments.

Comparative study of railgun housings made of modern fiber-wound materials, ceramic or insulated steel plates p. 70 Development of a naval railgun p. 76 Analysis of rail surfaces from a multi-shot railgun p. 81 On the noise component in muzzle voltage traces p.

85 An improved, linear homopolar, electro-magnetic launcher: STAR p. Tang L.L., Analysis of Electromagnetic Railgun Projectile Fuze's High Magnetic Field Environment and its shield design and Utilization, Ph.D.

Dissertation, Nanjing University of Science and Technology, [7] Zielinski A., In-bore electric and magnetic field environment, IEEE Transactions on Magnetics 1 (),DOI: /   A magnetic rail gun made of all neodymium magnets.

This science project uses super magnetic force to launch a magnetic object several feet. This version shoots further than the original magnetic. Resistive losses in a Rail Gun are given by: W r = R 0 (integral 0→t)i 2 dt = 2R 0 (mv)/L'.

With mv being the momentum of the projectile, it can be seen that energy loss in a railgun is proportional to projectile momentum (not kinetic energy, as might be expected), and can be minimized by increasing the induction gradient.

The concept of a railgun consists of propelling a conducting object along 2 conducting rails due to a magnetic force and an electric force.

The direction of the propelling force is due to electromagnetic fields called the Lorentz force. A coilgun uses a series of electromagnetic coils to accelerate a ferromagnetic projectile. For the railgun, the projectile is accelerated because of a current running through the projectile.

Due to recent advances in solid-state switches and ultra-capacitors, it is now possible to construct a “railgun” that can operate at voltages below 20 V. Railguns typically operate above a thousand volts, generating huge currents for a few milliseconds to provide thousands of g's of acceleration to a small projectile.

The low voltage railgun described herein operates for much longer. ≡ magnetic flux density (Τ) in usual MKS units. The magnetic field is produced by the configuration of the currents in the railgun. The system is a low-impedance one allowing one to approximately neglect the electric-field forces.

The magnetic forces can be quite large. The Electro-Magnetic Laboratory Rail Gun is a megajoule electro-magnetic laboratory rail gun being evaluated by the US Office of Naval Research. The US Navy is pursuing development of the launcher system through two industry teams — General Atomics and BAE Systems – to reduce risk in the program and to foster innovation in next.

electromagnetic railgun’s (EMRG) power supply, thus reducing its footprint. The EMRG was designed to offer a low cost alternative to orbital debris testing on satellites.

The current technology for testing, light gas guns, require large facilities to operate and are very expensive to employ.alternating electric intensity and magnetic force. An electromagnetic field may be defined in terms of four vector functions E, D, H and B, where: E is the electrical field in V/m.

D is the dielectric displacement in Coulomb/m². H is the magnetic field intensity in A/m.DOI: /EML Corpus ID: Electromagnetic railgun armature magnetic field measurement and analysis based on B-Dot probe signal @article{CaoElectromagneticRA, title={Electromagnetic railgun armature magnetic field measurement and analysis based on B-Dot probe signal}, author={Bin Cao and Xia Ge and Yong Liang Yang and Juxiang Li and Xiaochao Sun .