Search results
Results from the WOW.Com Content Network
An electromagnetic pulse is a short surge of electromagnetic energy. Its short duration means that it will be spread over a range of frequencies. Pulses are typically characterized by: The mode of energy transfer (radiated, electric, magnetic or conducted). The range or spectrum of frequencies present. Pulse waveform: shape, duration and amplitude.
An explosively pumped flux compression generator (EPFCG) is a device used to generate a high-power electromagnetic pulse by compressing magnetic flux using high explosives. EPFCGs are physically destroyed during operation, making them single-use. They require a starting current pulse to operate, usually supplied by capacitors.
Commercially made radiation meters are typically based on electronic circuitry or require a battery-powered charging apparatus, allowing susceptibility to battery shortages and to electromagnetic pulse. The Kearny fallout meter was designed to utilize static electricity, produced by (for example) a hard plastic rubbed on dry paper. [2]
The term "electromagnetic pulse" generally excludes optical (infrared, visible, ultraviolet) and ionizing (such as X-ray and gamma radiation) ranges. In military terminology, a nuclear warhead detonated tens to hundreds of miles above the Earth's surface is known as a high-altitude electromagnetic pulse (HEMP) device.
Nevertheless, the electromagnetic pulse when the machine is discharged causes impressive lightning, referred to as a "flashover", which can be seen around many of the metallic objects in the machine. Z machine cross section Z machine diagram
These MeV-energy Compton electrons then accelerate and spiral along the Earth's magnetic field lines. The resulting transient electric fields and currents generate electromagnetic emissions in the radio frequency range of 15 MHz to 250 MHz. This high-altitude EMP occurs between 30 and 50 kilometers (19 and 31 miles) above the Earth's surface.
The publication describes requirements, levels and test methods to achieve immunity compliance of an electronic product. The purpose is to create a reproducible ground for product compliance and the standard defines: ranges, levels, test equipment, setups, procedures, calibrations, generator waveforms and general uncertainties.
Print/export Download as PDF ... protection and protection from electromagnetic pulse." ... an NPT, occurred on September 28, 2016 as part of National Preparedness Month.