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Topic: Faraday cage

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	Knowledge King - Faraday cage (Site not responding. Last check: 2007-11-07)
		The Faraday cage is an electrical apparatus attributed to the physicist Michael Faraday.
		The Faraday cage is sometimes known as a Faraday shield.
		Faraday cages are often put to a dual purpose: to block electric fields, as explained above, and to block electromagnetic radiation.
	www.knowledgeking.net /encyclopedia/f/fa/faraday_cage.html (551 words)

	Encyclopedia: Faraday cage (Site not responding. Last check: 2007-11-07)
		In electromagnetism, the Faraday cage is an application of Gauss' law, one of Maxwell's equations.
		Faraday was the experimentalist who described the physical concepts formulated in Maxwell's equations.
		Some United States national security buildings are contained in Faraday cages, intended to act as a TEMPEST shield, and possibly also as a mitigation against electromagnetic pulse.
	www.nationmaster.com /encyclopedia/Faraday-cage (1278 words)

	Learn more about Michael Faraday in the online encyclopedia. (Site not responding. Last check: 2007-11-07)
		Faraday's experimental visualization, of lines of flux emanating from charged bodies, was mathematically modelled by James Clerk Maxwell, which has evolved into the generalization known as field theory.
		In the work on static electricity, Faraday demonstrated that the charge only resided on the exterior of a charged conductor, and exterior charge had no influence on anything enclosed within a conductor; this shielding effect is used in what is now known as a Faraday cage.
		Faraday's sponsor and mentor was John 'Mad Jack' Fuller, who created the Fullerian Professorship of Chemistry at the Royal Institution.
	www.onlineencyclopedia.org /m/mi/michael_faraday.html (491 words)

	Michael Faraday: The Invention of Faraday Cage
		Another explanation for the Faraday cage effect can be derived from Gauss's law that states that if there is no charge in a closed surface then the net flow of electric field from the surface must be zero.
		To demonstrate his ideas, Faraday built in 1836 a room (the Faraday cage), coated with metal foil, and allowed high-voltage discharges from an electrostatic generator to strike the outside of the room.
		The Faraday cage can be used to prevent the passage of electromagnetic waves and electric fields, either containing them in or excluding them from its interior space.
	www.juliantrubin.com /bigten/faradaycageexperiments.html (639 words)

	ipedia.com: Faraday cage Article (Site not responding. Last check: 2007-11-07)
		The Faraday cage is an electrical apparatus designed to prevent the passage of electromagnetic waves, either containing them in or excluding them from its interior space.
		It is named for physicist Michael Faraday, who built the first one in 1836.
		Some United States national security buildings are contained in Faraday cages, intended to act as a TEMPEST shield, and possibly also as a mitigation against EMP.
	www.ipedia.com /faraday_cage.html (628 words)

	Faraday cage for a printed circuit card - Patent 5475606
		The Faraday cage surrounds a shielded portion of the third conductor layer so that electrical signals conducted through the shielded portion are isolated from electrical noise.
		The Faraday cage is composed of the two ground planes 11, 12 and the interconnecting vias 13 which effectively isolate the two sets of signal wires 14, 15 from outside interference.
		The Faraday cage is comprised of the two ground planes 36, 38 and the connecting vias 44 placed around the periphery of the planes.
	www.freepatentsonline.com /5475606.html (5044 words)

	Electron Microscopy Laboratory
		The faraday cage is mounted in an isolated SA diaphragm holder (marked #1), together with three standard SA apertures (#2: 50micron; #3: 200micron; #4:800micron).
		The aperture on the Faraday cage is of equal size as the #2 SA aperture (50micron).
		Switch to Faraday cage aperture (#1) and center the Faraday cage with the X and Y movement (Maximum readout of Keithley ammeter).
	saturn.med.nyu.edu /facilities/electronmicroscopy/faraday.html (609 words)

	Faraday Cage Enclosures and Reduction of Microprocessor Emissions
		The hole is designed into the cage, as in most cases adding an extra layer of metal (by virtue of the metal cage) is not acceptable, because it will add thermal resistance and therefore hinder heat flow from the silicon to the heat sink.
		The bottom of the heat sink represents the top surface of the Faraday cage, and the sides of the metal cage represent the four vertical sides of the Faraday cage.
		To cascade the Faraday cage from the top to the sides, the periphery of the hole on the top of the cage must make solid contact with the bottom of the heat sink (a metal surface).
	www.ce-mag.com /archive/01/Spring/Raza.html (2825 words)

	Protect Yourself & Your Boat from Lightning - Faraday's Cage
		The principle of a Faraday's cage is to provide a surrounding, well-grounded, metal structure, in which all of parts are bonded together and carry the same electrical potential.
		In a boat, the "cage" is formed by bonding together, with heavy conductors, the vessel's mast and all other major metal masses.
		It is important that you ensure that your crew fall within the protection of the "cage," something not always feasible when the vessel is not built of steel or aluminum.
	www.boatsafe.com /nauticalknowhow/lightning.htm (678 words)

	Faraday cage -- Facts, Info, and Encyclopedia article (Site not responding. Last check: 2007-11-07)
		The Faraday cage is an (Click link for more info and facts about electrical) electrical apparatus designed to prevent the passage of electromagnetic waves, either containing them in or excluding them from its interior space.
		It is named for physicist (The English physicist nd chemist who discovered electromagnetic induction (1791-1867)) Michael Faraday, who built the first one in 1836.
		If the outside of the cage is an idealized conductor, it will form an (Click link for more info and facts about equipotential surface) equipotential surface, that is to say, its surface will have the same (Click link for more info and facts about electrical potential) electrical potential at every point.
	www.absoluteastronomy.com /encyclopedia/F/Fa/Faraday_cage.htm (566 words)

	Faraday Cages
		With radio's and smaller appliances, a Faraday cage can be built by using two cardboard boxes: one should fit tightly inside the other, and the item to be covered should itself fit reasonably well inside the smaller box.
		My laptop computer, for example, fits easily into a Faraday box made from a box that held reams of paper: the entire lid is removable, allowing easy access to the laptop in its case, but is safely stored when not in use.
		Any electrical appliances not in use should be stored in the Faraday cage, where they will be kept clean, neat, in a known location, and protected against any sudden EMP surge.
	www.endtimesreport.com /faraday_cages.html (1279 words)

	Computer including a Faraday cage on printed circuit board - US Patent 5587920 (Site not responding. Last check: 2007-11-07)
		The computer as recited in claim 2 wherein the board further comprises a fourth conductor layer in the analog section and outside the Faraday cage in which analog signal paths are defined intended for analog signals which are less sensitive than analog signals in the Faraday cage.
		The computer as recited in claim 1 wherein the ground planes in the Faraday cage are interconnected at selected peripheral regions by a plurality of vias which substantially encircle an area of the second section of the board.
		The computer as recited in claim 1 wherein the board further comprises a fourth conductor layer in the second section and outside the Faraday cage in which signal paths are defined for the second type of device intended for signals which are less sensitive than signals which use the signal paths in the Faraday cage.
	www.patentstorm.us /patents/5587920.html (4883 words)

	Rohm and Haas Powder Coatings - Faraday Cage Penetration
		A Faraday Cage is an area on the substrate where there is no electrostatic field from an external source.
		If the forward air velocity is excessive, the powder will rebound from the back of the Faraday cage and either adhere to the sides of the substrate or fall from the part.
		The cylindrical ï¿½bullet typeï¿½ nozzle pictured in the front left corner of the illustration is ideal for overcoming many of the Faraday cage problems that occur in the field.
	www.rohmhaas.com /powdercoatings/tech/application_answers/app_ans_faraday.html (719 words)

	Faraday's Cage in The AnswerBank: Science
		A Faraday cage is an enclosure with no apertures (holes, slits, windows or doors) made of a perfectly conducting material.
		No electric fields are produced within the Faraday cage by the incidence of external fields upon it or by currents flowing on the perfect conductor; that is, the perfectly conducting enclosure is a perfect electromagnetic shield.
		However, extremely good Faraday cages are constructed for electromagnetic experiments; they are commonly called "screen rooms." Early (and still common) screen rooms were made of copper mesh screen with a somewhat tighter mesh than typical aluminum window screen.
	www.theanswerbank.co.uk /Science/Question91332.html (419 words)

	PF Online Feature Article - Breaking Through The Faraday Cage
		For those of you who have not, the Faraday cage is like an invisible electrical screen that prevents charged powder particles from reaching internal corners and recesses.
		Between the bump and the edge of the pan was a strong Faraday cage.
		This does not mean that flat areas or edges near the Faraday cage are coated with too much powder, which is a common occurrence when solving Faraday cage problems.
	www.pfonline.com /articles/099903.html (1023 words)

	Faraday Cage (Site not responding. Last check: 2007-11-07)
		Lightning bolts come off of the coil, jump about 8 feet through the air (depending on how close the cage is to the coil), and blast the side of the cage where we sit.
		The arcs are super-loud and super-bright, but if no breakout terminal is used to direct the arcs toward the cage, bright purple streamers flicker all around you 10 feet to your left to 10 feet to the right, hitting the ground and close objects.
		The cage was moved to about 7 feet from the coil, and we placed a 6' fluorescent light bulb vertically inside the middle, resting it on a piece of plywood.
	www.hvguy.4hv.org /sgtc/faraday.htm (394 words)

	Engineered Systems: Lightning and surge protection: how does the Faraday cage help buildings shrug off a bolt from ...
		During this demonstration, a person was seated inside a metal cage shaped like a sphere, which was then hoisted by a crane high into the air adjacent to the business end of a Van de Graaff generator.
		The same principle, which safeguarded the occupant of this "Faraday Cage," is critical to using grounding and bonding to protect against voltage surges associated with lightning or power system transients.
		The occupant isn't harmed by the high voltage discharge because the entire surface of the cage is elevated uniformly to that voltage.
	www.findarticles.com /p/articles/mi_m0BPR/is_2_22/ai_n11831851 (839 words)

	[No title] (Site not responding. Last check: 2007-11-07)
		A Faraday cage is a metallic enclosure that prevents the entry or escape of an electromagnetic field (EM field).
		Faraday cages are used in electronic labs where stray EM fields must be kept out.
		In addition, a Faraday cage can prevent the escape of the EM fields emitted by a cathode-ray-tube (CRT) computer monitor.
	searchcrm.techtarget.com /termParser/1,290913,sid9_gci942282,00.html (220 words)

	SurfWax: News, Reviews and Articles On Michael Faraday
		Faraday, son of a flsmith, was an unhappy bookbinder's apprentice who yearned to be a scientist.
		Faraday saw his role as reading 'the book of nature written by the finger of God,' determining through experiment, analysis and deduction a huge network of interconnected scientific.
		While we must always heed the advice of Michael Faraday, who warned against the powerful temptation to seek for such evidence and appearances as are in the favor of our desires, and to disregard those which oppose them, we must have the courage to ask unreasonable questions.
	history.surfwax.com /files/Michael_Faraday.html (2331 words)

	ZPi \| Faraday Tents
		Their main website's domain is faradaycages.com -- sure to be found by anyone in the market for a Faraday cage, and in fact shows up on top as a sponsored link on a Google search -- and they conspicuously claim in the masthead to be from the Netherlands.
		Clearly they are trying to undermine paranoidal use of AFDB and related technology with Faraday cage disinformation.
		Before going on to make a name for himself with dynamos and benzene, Faraday was an "assistant" to Humphry Davy, the man who exposed the arcane psychotronic secret of Aluminum to the general public in 1807.
	www.zapatopi.net /blog?post=200503234210.Faraday_Tents (310 words)

	Faraday cage (Site not responding. Last check: 2007-11-07)
		A truly unique room called a Faraday Cage so named in honor of Michael Faraday who in 1831 discovered the principle of magnetic induction, and in 1836 described the Faraday Cage in his diary.
		Faraday lived from 1791 to 1867 and is often considered to be the greatest experimentalist in the field of electricity and magnetism.
		Germans but he was not adept enough at mathematics to challenge their position.
	www.emcdesign.com /Faraday/faraday.html (469 words)

	HEKA Faraday Cage (Site not responding. Last check: 2007-11-07)
		A Faraday cage shields by suppressing the magnetic and electric parts of the electromagnetic waves due to high surface conductance and high permeability.
		Both a stand-alone cage for use with an anti-vibration table and a bench-top model are available.
		The stand-alone Faraday cage consists of two parts: the stand (lower part) and the cage (upper part), which are mounted together in the laboratory.
	www.heka.com /physio/equipment/faraday.html (237 words)

	Single Electron Transistor Encasement Inside a nano-Faraday Cage (Site not responding. Last check: 2007-11-07)
		Caged transistors are less sensitive than uncaged transistors to electrostatic discharge damage and can be left in harsh environmental conditions without appreciably modifying their properties.
		Faraday cage encasement is therefore likely to permit extensive post-fabrication processing.
		Tunneling resistances in the caged transistors are roughly an order of magnitude lower than their uncaged counterparts, indicating either that the cage compresses the tunneling oxide by \sim 10 % or else that the tunneling barriers in conventional Al/AlO_x/Al single electron transistors are primarily formed after breaking vacuum.
	flux.aps.org /meetings/YR00/MAR00/abs/S1070009.html (168 words)

	Angled Faraday Cage (Site not responding. Last check: 2007-11-07)
		The Angled Faraday Cage was the first design actually built.
		The angled Faraday Cage is composed of 13 parts with most requiring both a left and right side.
		The design of the Faraday Cages was broken down into the four types of chambers: 4X6X14, 4X6X8.5, 3X8X14, and 3X8X8.5.
	www.hepl.harvard.edu /~ATLAS_BMC/faraday_cage/angled/angled_fc.html (232 words)

	How does a Faraday Cage work? or, Why can a satellite dish have holes in it?
		Therefore, it is possible to make a Faraday Cage or a satellite dish with 'holes' without materially affecting performance, provided that the holes are less than about a wavelength across.
		In the case of a satellite dish, it is the maintenance of the reflection characteristics of the dish, even though it may consist of a mesh with substantial holes (to the eye, which, not accidentally, utilizes wavelengths very much shorter than radio waves), that matters.
		In the case of a Faraday Cage, it is the maintenance of adequate attenuation of radio waves, due to the difficulty of penetrating the holes, that matters.
	www.physlink.com /Education/AskExperts/ae176.cfm (426 words)

	Design Updates (Site not responding. Last check: 2007-11-07)
		A meeting was held on Dec 1st in an attempt to address some of the electrical issues involving the Faraday Cage design.
		The height and length of the faraday cage on the HV end can be increased as requested by Agostino.
		The sockets for the flexi-ciruit to connect could be moved to a location well away from the end of the PC board near the faraday cage.
	www.hepl.harvard.edu /~ATLAS_BMC/faraday_cage/box_box/design_updates.html (437 words)

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