Posts in category EMP-Tech

Numerical Simulation of the HEMP Envi...

Numerical Simulation of the HEMP Environment

This paper develops the program MCHII, numerically simulating the physical process of Compton electron currents scattered by the interaction of γ rays with ambient air molecules radiating the early time electromagnetic pulse (E1) during the high altitude nuclear explosion. The paper discusses the waveform characteristics of the electromagnetic pulse E1 as it propagates toward the […]

Developments in Early-Time (E1) High-...

Developments in Early-Time (E1) High-Altitude Electromagnetic Pulse (HEMP) Test Methods

This paper describes developments in high-altitude electromagnetic pulse (HEMP) test methods. More specifically, we describe the most commonly used HEMP test methods and associated measurement systems used to assess systems and equipment to the early-time (E1) effects ofHEMP. Short case studies of the application of these test methods are included. Finally, computational electromagnetics (CEM) is […]

A Review of HEMP Activities in Europe...

A Review of HEMP Activities in Europe (1970–1995)

This paper presents a review of the high altitude EMP (HEMP) activities in European countries between 1970 and 1995. HEMP simulators built in different countries are presented together with measurements performed under them and calculation methods developed in order to simulate the currents or voltages induced by an HEMP in power or telecommunication lines or […]

Expedient Building Shielding Measurem...

Expedient Building Shielding Measurement Method for HEMP Assessments

HEMP has long been a concern for the military, but can also be a concern for civilian or commercial facilities. The shielding effectiveness of a building can be an important part of the facility’s HEMPhardness, and as such may need to be determined for an HEMP assessment. Here, a simple and easy shielding effectiveness approach […]

An Overview of the HEMP Research in C...

An Overview of the HEMP Research in China

This paper reviews developments in high-altitude electromagnetic pulse (HEMP) research in China in recent decades. The main contents are obtained from a literature survey of technical papers published in the past years, which include HEMP simulators and test systems, coupling analysis methods and results, experimental research on the susceptibility of electronic equipment, time-domain measurement, and […]

Worldwide High-Altitude Nuclear Elect...

Worldwide High-Altitude Nuclear Electromagnetic Pulse Simulators

The five decades since the discovery that the electromagnetic pulse created by a nuclear detonation at high altitude (HEMP) threatens the survivability of strategic military and civilian electronic systems saw development and construction worldwide of many large test facilities for simulating that threat. This paper describes simulators in three categories: guided wave, dipole, and hybrid. […]

Tolerance Values and the Confidence L...

Tolerance Values and the Confidence Level for High-Altitude Electromagnetic Pulse (HEMP) Field Tests

This paper discusses tolerance values and confidence levels for high-altitude electromagnetic pulse (HEMP) field tests. An HEMP simulator provides the HEMP environment with various degrees of completeness. Deviations from the ideal waveform occur due to the simulator structure and concept. In this paper, we review tolerance values for pulse parameter specified in civil and military […]

High-Altitude Electromagnetic Pulse (...

High-Altitude Electromagnetic Pulse (HEMP) Risetime Evolution of Technology and Standards Exclusively for E1 Environment

There are many different definitions of the risetime of a transient waveform. In the context of high-altitude electromagnetic pulse (HEMP) standards, the 10-90% risetime of an idealized double exponential waveform has been defined and used for many decades. However, such a risetime definition is not strictly applicable to the transient voltage out of a pulse […]

Back to Results 2030-2011 – I...

Back to Results 2030-2011  –  IEEE Guide for Smart Grid Interoperability of Energy Technology and Information Technology Operation with the Electric Power System (EPS), End-Use Applications, and Loads

IEEE Std 2030 provides alternative approaches and best practices for achieving smart grid interoperability. It is the first all-encompassing IEEE standard on smart grid interoperability providing a roadmap directed at establishing the framework in developing an IEEE national and international body of standards based on cross-cutting technical disciplines in power applications and information exchange and […]

Development of the Time Dependence of...

Development of the Time Dependence of the Nuclear (E1) HEMP Electric Field

The early time (E1) nuclear high altitude electromagnetic pulse electric field calculated with the code CHAP is compared with the field given by an integral solution of Maxwell’s equations, also known as the Jefimenko equation, to aid our current understanding on the factors that affect the time dependence of the electromagnetic pulse (EMP). For a […]