An electromagnetic pulse emp attack represents one of the greatest threats imaginableto the united states and the world. The shielding effectiveness exceeds the minimum hemp requirements as specified in the milstd188125 hemp protection for groundbased c4i facilities performing critical, time urgent missions. Conductive concrete mixtures are described that are configured to provide emp shielding and reflect andor absorb, for instance, em waves propagating through the conductive concrete mixture. This sudden burst of electromagnetic radiation, from. Lowfrequency protection concepts for the electric power grid. Common metal meshes, due to their large hole opening, provide low rate of screening, especially at high frequencies. Emp physics early on in the development of nuclear weapons, the presence of the electromagnetic pulse was known. Besides the risk of a hemp highaltitude electromagnetic pulse attack from rogue nations such as north korea and iran, electronic, computer, data and power systems are also vulnerable to the next likely form of terrorism and criminal activity. In very large events an emp can cause electronic systems failures.
What materials are used for electromagnetic shielding. Under the licensing agreement, abc group has exclusive rights to market the shielding shotcrete product, and its emsselectromagnetic shielding shotcrete is now commercially available, said mauricio suarez, director of licensing at nutech ventures, the universitys nonprofit technology commercialization affiliate. Whether caused by an enemy attack a nuclear device detonated above the atmosphere or. Some gaskets and other forms of electromagnetic shielding contain. I even have an ancient radio shack trs80 model 4p that has been retrofitted with a complete electromagnetic shield. Electromagnetic pulse emp is an instantaneous, intense energy field that can. Department of energy electromagnetic pulse resilience. Electromagnetic em radiation effects sciences securing our nation from the threat of hostile em radiation environments triggering a threat to our nations electricity grid, an electromagnetic pulse emp could cause catastrophic damage, resulting in longterm, national power outages. High altitude electromagnetic pulse hemp and high power microwave hpm devices. Electromagnetic pulse emp protection public intelligence.
Emp protection investments and the efficacy of applying such protections. When a nuclear explosion occurs in space above a target, three types of electromagnetic pulses follow. An emp, or electromagnetic pulse, is a naturally occurring phenomenon caused by a sudden, rapid acceleration of particles generally electrons that create an intense burst of electromagnetic energy. As proven by george clooney and his crew in oceans eleven, even hollywood knows that electronics can be manipulated and even destroyed by being subjected to an electromagnetic pulse emp. Electromagnetic pulse emp september 2003 fact sheet 320090 division of environmental health office of radiation protection what is emp and how is it created. E1 pulse fast component 20550 nsec pulse electromagnetic shockwave travels at the speed of light peak value up to 50,000 voltsmeter too fast for lightening devices to react. An emp or e lectro m agnetic p ulse is a wave of electromagnetic radiation. Electromagnetic pulse emp infragard, eugene, oregon eugene public safety center. The thickness, material choice and form depends on which frequencies are to be deflected, at what intensity, whether the device is to be protected from electric or magnetic fields, or both, the shape of the device, its ability to bear weight and its exposure to the elements, among other factors. Aluminium is widely used due to its nonferrous properties, its strengthtoweight ratio, and its high conductivity. Strategies, protections, and mitigations for the electric. Emp events occur with little or no warning and can have catastrophic effects. Emp electromagnetic pulse weapon technology along with emp. Unfortunately, the actual effects of the emp were still not truly known.
Emp electromagnetic pulse weapon technology along with. Protect yourself from the electromagnetic fields of cell phone masts, wifi networks, etc. Doe electromagnetic pulse resilience action plan january 10, 2017 1 introduction background on emp electromagnetic pulses emps are intense pulses of electromagnetic energy resulting from solarcaused effects or manmade nuclear and pulsepower devices. You can measure the radiation levels in your spaces using a high frequency radiation meter and a low frequency radiation meter. How to use special reflective paints, window films, fabrics, canopies, curtains and meshes. Executive order on coordinating national resilience to. Electromagnetic pulse emp washington state department of. The most important mechanism for electromagnetic pulse emp production from a nuclear detonation is the ionization of air molecules by gamma rays generated from the explosion. An electromagnetic pulse emp over the united states could end modern life in america overnight. Electromagnetic shielding is the practice of reducing the electromagnetic field in a space by blocking the field with barriers made of conductive or magnetic materials. An electromagnetic pulse originating from one of three possible sources. Idaho national laboratory inl was chosen to conduct the emp study for doeoe. Assessing the threat from electromagnetic pulse emp executive report 4 observations, analysis, and recommendations the commission to assess the threat to the united states from electromagnetic pulse emp attack was previously convened by the congress from 20012005 and from 20072008, and currently from 20162017. Emp shielding electromagnetic pulse shielding european.
An electromagnetic pulse emp is defined as a brief surge of electromagnetic energy and it can be the result of either manmade or natural disturbances. An electromagnetic pulse emp, also sometimes called a transient electromagnetic disturbance, is a short burst of electromagnetic energy. Electromagnetic pulse emp protection and restoration guidelines for equipment and facilities with appendices a c december 22th, 2016 version 1. A flexible electromagnetic pulse shielding conduit for electrical conductors which is constructed of a backshell to which is secured a flexible, sheet material tube and an electrically conductive metallic braid. Electromagnetic pulse hemp or intentional electromagnetic interference iemi. Will temporarily or permanently disrupt the functioning of electronic devices due to high induced voltages and heating communications. The electromagnetic pulse emp protection guidelines were initially. And as electronic devices have become portable, so too have emp generators today they are as small as a briefcase. An emp does not directly hurt people, but an emp interacts with power lines, metal, conductive materials and electronics and causes power spikes.
Power grid iemi is a term that is applied to the nonexplosive, nonnuclear intentional generation of intense electromagnetic fields that are used to introduce signals into electronic equipment for the specific purpose of disrupting, confusing or damaging these electronics. X research source some everyday occurring causes of emps are. Highaltitude nuclear detonations and electromagnetic bombs can generate emp that. Us4786757a flexible electromagnetic pulse shielding conduit. Pdf study on the shielding effectiveness of an arc thermal. Meteolabor lightning and emp protection devices standard products.
Emi can travel along wires, electrical circuits and conductors, while radio frequency interference rfi is radiated. Choose emp protection that defies with etslindgren red edge certified systems and components. Us8968461b1 concrete mix for electromagnetic wavepulse. Of the metals used for shielding, galvanized steel and aluminium are the most costeffective and widely used. Doe electromagnetic pulse resilience action plan january 10, 2017 1 introduction background on emp electromagnetic pulses emps are intense pulses of electromagnetic energy resulting from solarcaused effects or manmade nuclear and pulse power devices. Recognized the world over for our shielding and protection expertise, weve also been instrumental in the development of protection products and standards that have. Defense against electromagnetic pulse weapons semantic scholar.
How to shield your house from electromagnetic radiation. Highaltitude electromagnetic pulse hemp created by the detonation of a nuclear weapon at highaltitude or in space e1. Electromagnetic shielding solutions are especially recommended in bedrooms, because the artificial electromagnetic interference is considered more aggravating during the critical hours of sleep. One of the threats oe is concerned about is a highaltitude electromagnetic pulse hemp from a nuclear explosion and electromagnetic pulse emp or an early time e1 pulse which can be generated by emp weapons. Critical design issues in protecting against emp and hemp.
Electronics can be affected and in some cases an emp can result in physical destruction of things such as structures and vehicles. The braid is located about the tube with both the braid and the tube being secured to the backshell through the use of a metallic band which is shrunk concentrically through the. Levels 3 and 4 also use hardness maintenance and hardness surveillance hmhs programs to verify that the emp shields are effective and that the emp barriers integrity is maintained over the life cycle of the system. Emp grounding gets very tricky, and the ordinary rules for grounding do not apply.
Emp protection and resilience guidelines 5 february 2019 cisa. Dhs emp protection guidelines for equipment and facilities. The emp shielding of critical facilities is vital to protect a functioning command and control structure from emp type attacks, possibily launched hundreds of kilometres. Copper, nickel, pretin plated carbon steel, zinc and nickel silver are also used for some purposes. Coordinating national resilience to electromagnetic pulses. Emp can also be produced from nonnuclear sources, such as electromagnetic bombs, or ebombs. The purpose of electromagnetic pulse protection empp is to prevent the electromagnetic pulses from high level nuclear weapons disrupting and destroying electronic equipment. Ibccompliant concrete practice reaches electromagnetic. Mar 26, 2008 high altitude electromagnetic pulse hemp and high power microwave hpm devices. The conventional electromagnetic pulse and high powered microwave weapons can disable nonshielded electronic devices including practically any modern. While you may not be able to prevent an emp event, you can control the outcome. Electromagnetic interference, or emi, is the magnetic field which is created by electrical currents. The subject of this paper is an electrically conductive textile. Mar 26, 2019 by the authority vested in me as president by the constitution and the laws of the united states of america, it is hereby ordered as follows.
This is a page about some of the things that individuals can do to prepare for an electromagnetic pulse attack or a severe solar storm. Shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cable runs. Special thanks to carla bass, colonel, usaf ret, author of the awardwinning book, write to influence. Such a pulse s origin may be a natural occurrence or manmade and can occur as a radiated, electric, or magnetic field or a conducted electric current, depending on the source. Shielding is typically applied to enclosures to isolate electrical devices from their surroundings, and to cables to isolate wires from the environment through which the cabl. Emp, a sudden burst of electromagnetic radiation resulting from a natural or manmade event. Such a pulses origin may be a natural occurrence or manmade and can occur as a radiated, electric, or magnetic field or a conducted electric current, depending on the source emp interference is generally disruptive or damaging to electronic equipment.
Electromagnetic pulse emp effects survival sullivan. Reconnaissance c4isr facilities, hemp protection systems, april 15, 2001. High altitude electromagnetic pulse hemp and high power. A theory of electromagnetic shielding with applications to. The conductive concrete mixtures include cement, aggregate, water, metallic conductive material, and conductive carbon particles andor magnetic material. Im an electronics engineer who has been thinking about the emp problem for more than 3 decades. Electromagnetic shielding is a barrier which protects electronic equipment from ambient electromagnetic interference.
Key words continue on rereree aide if neceeary and identity by block number. Electromagnetic shielding manufacturers iqs resources. Jan 15, 2018 what forms of electromagnetic shielding exist. Emp field strength should be attenuated by a factor of at least 99. How to make an electromagnetic pulse with pictures wikihow. Conductive concrete shields electronics from emp attack. Electromagnetic pulse shielding effectiveness of circular. Pdf shielding of electronic systems against transient. Extended efforts have been made to imhowever, the extent and potentially prove theoretical models and to develop serious nature of emp effects were not associated computer codes for predicrealized for several years. The goal of electromagnetic em shielding is to protect electrical and electronic components and assemblies from external em fields or to prevent that em fields produced by apparatus and systems. Before the july 16, 1945 trinity test, enrico fermi had tried to calculate the possible electromagnetic fields that would be produced.
Mar 30, 2019 an emp or e lectro m agnetic p ulse is a wave of electromagnetic radiation. In order to protect electronic systems against the effects of transient electromagnetic interferences, shields made of electrically conductive material can be used. Threat assessments summary electromagnetic pulse emp is an instantaneous, intense energy field that can. Threat assessments background a commission to assess the threat from high altitude electromagnetic pulse emp commission was established by congress in fy2001 after several experts expressed concern that the u. While emps can potentially damage electronics, this technology. And as electronic devices have become portable, so too have emp generators. Us4786757a flexible electromagnetic pulse shielding. Pdf study on the shielding effectiveness of an arc.
Selecting emp protection for enclosures electronic products. By the authority vested in me as president by the constitution and the laws of the united states of america, it is hereby ordered as follows. The electrons respond to this movement by letting off their newly acquired energy as a powerful soup of electromagnetic radiation, including radio waves. Our filters are tested with our inhouse test facility with which we are capable to perform pci as per e1 20500 ns 5 ka peak and e2 1. Electric grid communications from electromagnetic pulse foundation for resilient societies april 2020 report prepared by david winks acqusight, inc. Electromagnetic pulse emp protection and resilience. For shielding small items like radios and other electronics equipment, use the nested faraday cage system of alternating foil or screen and plastic, and dont bother with the ground connection unless you plan to physically bury your equipment.