The reconnection gun

Cowan, M.; Cnare, E.C.; Duggin, B.W.; Kaye, R.J.; Tucker, Timothy J.

doi:10.1109/tmag.1986.1064637

Cited by 55 publications

(15 citation statements)

References 1 publication

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“…When the circuit current and the inductance gradient are given, the motion of the projectile can be calculated with (1) and (2). Considering the relation between the force and the acceleration, and the relation between the acceleration and the displacement, we can rewrite (2) as follows:…”

Section: Simulation Modelmentioning

confidence: 99%

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Simulation and Optimization of the Multi-Stage Reconnection Electromagnetic Launch

Zhao

Zou

et al. 2008

2008 14th Symposium on Electromagnetic Launch Technology

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The reconnection electromagnetic launcher utilizes the interaction between the projectile eddy current and the coil magnetic field to accelerate the projectile. A reconnection launch experimental system using the box-shaped helical coils and the flat-plate projectile has been fabricated. Capacitor banks are used as the power supplies. The inductance gradient curve-fitting is performed on the basis of the measured data from the launch apparatus. Based on the circuit equation and the motion equation of the reconnection electromagnetic launch, the numerical simulation model of the projectile motion is established. The simulations show that the launch efficiency decreases when the projectile velocity increases in the multi-stage launch if every stage is kept with the same parameters. To solve the problem, an optimization for the multi-stage launch is presented. The oscillating cycle of the circuit current in each stage is determined according to the projectile velocity, from which the capacitance of the capacitor bank is determined further. Combined with the use of triggered vacuum switches (TVS) as closing switches and owing to the special arc extinguishing performance of the TVS, the projectile velocity can be increased and the launch efficiency can be improved greatly.

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Section: Simulation Modelmentioning

confidence: 99%

“…Reconnection launchers include different types, such as the box-shaped coil or the cylindrical coil, the flat-plate projectile or the tubular projectile, the single-stage launcher or the multistage launcher [1] - [2].…”

Section: Introductionmentioning

confidence: 99%

Simulation and Optimization of the Multi-Stage Reconnection Electromagnetic Launch

Zhao

Zou

et al. 2008

2008 14th Symposium on Electromagnetic Launch Technology

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“…Or, instead of coaxial solenoids, the launcher could consist of a "pancake" coil primary and a similar shorted armature, or solid plate, as in Figure 2. The original Sandia launcher, called a "reconnection gun" [5], was of this second design. It accelerated a solid aluminum plate by passing it through a sequence of flat coils located on either side of a thin guideway.…”

Section: Figure 1 a Dual-solenoid Coilgun The Powered Coil (Red) Inmentioning

confidence: 99%

The Physics of SERAPHIM

Marder¹

2001

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“…In a recent paper [1] a revisited version of the reconnection launcher [2] has been presented under the name of Multipole Field Electromagnetic Launcher [1]. This launcher is an induction device and as a consequence is free from the drawbacks related to the sliding contacts that affect the rail ones.…”

Section: Introductionmentioning

confidence: 99%

Analytical model of a travelling wave multipole field electromagnetic launcher

Musolino

Rizzo

Tripodi

2012

2012 16th International Symposium on Electromagnetic Launch Technology

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The problem of the evaluation of eddy currents induced in a conductive cylinder is here reconsidered under the light of possible application in the electromagnetic launch context. In particular we derive an analytical solution when the system is excited by a sinusoidal current flowing on a saddle coil moving in the axial direction. Subsequently we consider an arrangement of such coils distributed in the axial and azimuth direction. When properly fed they produce a travelling wave of flux distribution which is able to exert a thrust force on the conductive cylinder. Since the governing vector field equation is not separable in the cylindrical coordinate, an approach based on the second order vector potential (SOVP) formulation has been here adopted. Scalar field equations are obtained whose solutions are expressed in terms of Bessels function.

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The reconnection gun

Cited by 55 publications

References 1 publication

Simulation and Optimization of the Multi-Stage Reconnection Electromagnetic Launch

Simulation and Optimization of the Multi-Stage Reconnection Electromagnetic Launch

The Physics of SERAPHIM

Analytical model of a travelling wave multipole field electromagnetic launcher

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