Simple 2d model for helical fluxcompression generators. Primed with an initial electrical starting current, a high velocity explosive is used to mechanically compress the magnetic field, which in turn transfers energy. The high energy density of the high explosives makes flux compression generators attractive as compact. Practical considerations in helical fluxcompression. Pdf optimized output voltage of flux compression generators. The fcg unit provides a large current gain from the initial seeded current introduced through the windings of the generator.
The small electric flux generator is a block added by industrialcraft 2 classic. For an fcg to be applicable to an hpm device, the high current output must be converted to a high voltage source via the iess. Magnetic flux compression generators offer the largest pulsed power output per unit size or weight when compared with other more conventional systems. Reduce file size while optimizing for maximal pdf quality. Helical fluxcompression generators provide the most useful power source for many high energy and highcurrent singleshot applications, for proof of principle experiments or when a capacitor bank is too bulky to be transported for use on a remote site smith et al.
Devices that can achieve this objective include a large lowinductance capacitor bank discharged into a singleloop antenna, a microwave generator, and an explosively pumped flux compression generator. Sensitivity analysis and stray capacitance of helical flux. Conclusions 362 appendix 362 abstract sixty years after the. Practical considerations in helical fluxcompression generator design the total magnetic energy in the load w is related to the total chemical energy in the explosive charge q by w. And the governmentsponsored research has usually been concerned with very large generators with explosive charges that require elaborate facilities and safety arrangements.
While a fcg can be made small, typically the seed energy that the fcg amplifies comes from a capacitator bank much larger and heavier than the fcg. An explosively pumped flux compression generator epfcg is a device used to generate a highpower electromagnetic pulse by compressing magnetic flux using high explosive the us army has programs that require very compact explosive drive power supplies. An epfcg package that could be easily carried by a person can produce. Sep 17, 2018 a peak field of 1200 t was generated by the electromagnetic flux compression emfc technique with a newly developed megagauss generator system. Decomposition of a helical generator circuit into a single zcircuit and n 0current circuits. A copy of the license is included in the section entitled gnu free documentation license. Williams abstract an introduction to the concept of a propellantdriven magnetic flux compression generator is presented, together with the theory of its operation. Optimized output voltage of flux compression generators by modified detonation method. It is coaxial, and comprises a 15 cmdiameter armature and a 30cm stator, each aluminum. Basic ac electrical generators 1 introduction faradays law. A peak field of 1200 t was generated by the electromagnetic flux compression emfc technique with a newly developed megagauss generator system. None of these abbreviated descriptions is perfect, but for the time being we appear to be stuck with them. Radio frequencies explosive magnetic flux compression generator.
Experimental methods with flux compression generators. Small electric flux generator official feed the beast wiki. Nonnuclear emp weapons how ebombs work howstuffworks. A helical magnetic flux compression generator with a. Modeling of a small helical magnetic flux compression generator, accepted for publication in transactions on plasma science, special issue on pulsed power, 10 2008 iii. Magnetic flux compression generators ieee journals. In the seventh ieee pulsed power conference in monterey, ca 1989, fowler and others published the performance characteristics for the recently developed mkix explosivedriven magnetic flux compression generator fcg.
A batterypowered flux compression generator system nasaads. The magnetic flux compression generator mfcg offers the largest pulsed power output per unit size or weight when compared with other conventional systems 1 2. Jan 23, 2014 my favourite series, talking about my favourite film. A type of impulse generator in which megajoules of energy can be generated within microseconds by abruptly reducing the volume of a closed conducting cage. Magnetic flux compression reactor for spacecraft propulsion. Mathematical simulation of helical flux compression generator. The length may be varied to suit the demands of each experiment. This conceptual bomb design comes from this report written by carlo kopp, a defense analyst.
Studies on a helical magnetic flux compression generator. Related content megagauss magnetic fields f herlacha copperlined magnet coil with maximum field of 700 t for electromagnetic flux compression. Find out information about flux compression generator. The principles of operation of the propellant flux. Today, most electric machines operate with radial flux rf. If seed energy was supplied by a compact device, fcgs could be used as portable power supplies. Experiments with and modelling of explosively driven. A helical magnetic flux compression generator with a conical. Figure 1 provides a comparison of the rf and af technologies 1. The basic performance of a simple helical flux compression generator, driven by 200 g of high explosives, has been studied with currentvoltage measurements and optical diagnostics. The reactive load transmits the emp in response to an electric current pulse. The flux conservation in a real generator is always less than one. Flux compression generators fcg, magnetic flux compression generators mfcg, and, particularly in the soviet, and now russian, literature, magnetocumulative generators mcg. The electrical energy from flux compression can recharge a capacitor bank or other energy storage without using a high voltage power supply.
This paper presents a simple but complete 2d model for helical flux compression generators that overcomes many of the limitations present in existing zerodimensional models. Had to laugh at this when it came on tele, after my wife telling me to stop talking about back to the future. My favourite series, talking about my favourite film. The fcg includes an environmental case, a reactive load, a dielectric core, a superconducting stator, an electric energy source, a load switch, and a transition device. By utilizing an electroexplosive fuse, a large didt into a coupled load is possible. Box 270710, san diego, california 92198, usa 2sandia national laboratories, albuquerque, nm 87185, usa a wirearray flux compression cartridge installed on sandia. Emphasis has been put on the characterization of physical effects that limit the generator output with respect to, for instance, maximum achievable output current. A flux compression generator fcg is provided for producing an electromagnetic pulse emp. Magnetic flux compression generators article pdf available in proceedings of the ieee 927. It is used to convert energy units eu to redstone flux rf. A fast and compact pinch electromagnetic flux compression generator to cite this article. The first work on these generators was conducted by the vniief centre for nuclear research in sarov at the beginning of the 1950 s, and then, independently, by lanl in the usa. Permission is granted to copy, distribute andor modify this document under the terms of the gnu free documentation license, version 1. Tikhomirov, twodimensional model of intrinsic magnetic flux losses in helical flux compression generators, september, 2012, eprint arxiv.
As will be noted in the following sections, there are several. Just draganddrop your pdf file in the box above, wait for the compression to complete and download your file. An epfcg only ever generates a single pulse as the device is physically destroyed during operation. Pulse power applications of flux compression generators c. They have found widespread use as pulsed power sources for hydrodynamics programs and high magnetic field research at national laboratories or in commercial applications, including exploration for. Magnetic flux compression experiments using plasma armatures. These generators are capable of producing voltages of hundreds kilovolt and currents of tens to hundreds mega ammeter. Combined flux compression and plasma opening switch on the. Radio frequencies explosive magnetic flux compression. Per default, industrialcraft 2 classic will convert 1 eu to 4 rf. Generators, motors, transformers, and solenoids each use the principle of electromagnetism.
Lappeenranta university of technology isbn 9522140295, isbn 9522140309 pdf, issn 14564491. Conferences in the field of flux compression are also dominated by contributions from government us and foreign laboratories. Il explosives magnetic flux compression generators the general principles of explosives magnetic flux compression devices have been reasonably well documented. This kind of devices converts the chemically stored energy in a high explosive into electromagnetic energy in the form of a powerful current pulse. An explosively pumped flux compression generator epfcg is a device used to generate a highpower electromagnetic pulse by compressing magnetic flux using high explosive.
Find out information about fluxcompression generator. This thesis presents work performed on explosively driven magnetic flux compression generators. Optimizing the ranchero coaxial flux compression generator. Electrical behavior of a simple helical flux compression generator for code benchmarking. An epfcg package that could be easily carried by a person can produce pulses in the millions of amperes and tens of terawatts. This sort of ebomb has a fairly simple, potentially inexpensive design, illustrated below.
The generator circuit is effectively decomposed into separate z and. Record indoor magnetic field of 1200 t generated by. Fluxcompression generator article about fluxcompression. Il explosives magnetic flux compression generators the general principles of explosives magnetic fluxcompression devices have been reasonably well documented. Experiments with and modelling of explosively driven magnetic. Magnax says the key to the high power density is its motors yokeless af design with two rotors at each side of the. Schematic of flux compression reactor electrical circuit illustration of magnetic diffusion processes in the stator and armature.
Modification of armature tube used for conical expansion. Explosively pumped flux compression generator wikipedia. Magnatized target fusion in advanced propulsion research. The crowbar ring is linked to the detonator not shown and. Helical flux compression generators hfcg of a 50 mm form factor have been shown to produce output energies on the order of ten times the seeded value and a typical deposited energy of 3 kj into a 3 muh inductor. An explosively pumped flux compression generator epfcg is a device used to generate a highpower electromagnetic pulse by compressing magnetic flux using high explosive an epfcg only ever generates a single pulse as the device is physically destroyed during operation. Optical diagnostic on helical flux compression generators. Ranchero 43s generator lanldeveloped, cylindrical coaxial magnetic flux compression generator highcurrent generating 100 ma highexplosive efficient 10s lbs seed current from a single capacitor bank easily scalable and reconfigurable. Helical flux compression generators 381 z current circuit figure 1. Our previous work with a nonoptimized fuse has produced100 kv into a 15 load, which leads into a regime relevant for high power. The stator a is the chamber that contains the electromagnetically derived field and it is built around b, the armature where the. The design concept has been widely available to the public for.
A common type of mfcg in use is a helical generator, hfcg, because it can provide very high current gain in a compact form. Nyholm, numerical simulations of flux compression generator systems, proceedings of the 20th iet. The article focused on flux compression generator bombs fcgs, which date back to the 1950s. Combined flux compression and plasma opening switch on. For a given bomb size, this is accomplished by using the most powerful flux compression generator and vircator in a hpm bomb which will fit the. Magnetic fields closely up to the turnaround peak were recorded by a reflectiontype faraday rotation magneticfield opticalfiber probe. May 18, 2006 a flux compression generator nonexplosive test bed for explosive opening switches abstract.
Your files will be permanently deleted from our server after one hour. No one has access to your files and privacy is 100% guaranteed. Ebomb frequently asked questions air power australia. Magnax offers a new concept, thougha machine that operates with axial flux af. The magnetic nozzle can operate as a magnetic flux compression generator to provide the necessary circulating power for continued operation, yet still maintain a high nozzle efficiency. The helical generator research described here centers on experiments utilizing two distinct generator designs, based on 7. Radio frequencies explosive magnetic flux compression generator rf mfcg as a kind of maneuverable and compacted device for generating and radiating electromagnetic pulse is composed of a helical magnetic flux compression generator and a small.
Axialflux motors and generators shrink size, weight. Design of axialflux permanentmagnet lowspeed machines and performance comparison between radialflux and axialflux machines lappeenranta 2005 153 p. A fast and compact pinch electromagnetic flux compression. The stator a is the chamber that contains the electromagnetically derived field and it is built around b, the armature where the explosives are housed. Explosively driven magnetic flux compression generators mfcg are effective high current, compact, disposable pulsed power supplies 1. Ranchero is an explosively driven magnetic fluxcompression generator that has been developed, over the last four years, as a versatile power source for high energy density physics experiments. They have found widespread use as pulsed power sources for hydrodynamics programs and high magnetic field research at national laboratories or in commercial applications, including exploration for oil and minerals and mine detection. A flux compression generator nonexplosive test bed for. Nonnuclear electromagnetic pulse nnemp is a weapongenerated electromagnetic pulse without use of nuclear technology. An epfcg package that could be easily carried by a person can produce pulses in the millions of amperes.
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