Possible application of transient electromagnetic pulses to high brightness e-guns

1992 ◽  
Author(s):  
N. A. Kurnit ◽  
P. K. Benicwicz ◽  
A. J. Taylor
Keyword(s):  
Electromagnetic Pulses ◽  
High Brightness ◽  
Transient Electromagnetic

scholarly journals Propagation characteristics of arrayed transient electromagnetic pulses

2011 ◽  
Vol 56 (18) ◽  
pp. 1957-1964 ◽  
Author(s):  
HaiJuan Cui ◽  
HongChun Yang ◽  
ChengLi Ruan ◽  
MingHe Wu
Keyword(s):  
Propagation Characteristics ◽  
Electromagnetic Pulses ◽  
Transient Electromagnetic

scholarly journals Susceptibility of personal computer systems to electromagnetic pulses with double exponential character

2005 ◽  
Vol 2 ◽  
pp. 63-69 ◽  
Author(s):  
M. Camp ◽  
H. Garbe
Keyword(s):  
Personal Computer ◽  
Pulse Shape ◽  
Computer Systems ◽  
Electromagnetic Pulses ◽  
Transient Electromagnetic ◽  
Double Exponential ◽  
Exponential Character ◽  
Fast Transient ◽  
Exponential Pulse ◽  
Computer Generation

Abstract. In this paper the susceptibility of personal computer systems to fast transient electromagnetic pulses with double exponential pulse shapes (EMP, UWB) is determined. The influence of the computer generation, RAM-values, different program states and the pulse shape, as well as the destruction thresholds of single PC-components (CPU, RAM, BIOS, Mainboard) have been investigated.

scholarly journals Supertoroidal light pulses as electromagnetic skyrmions propagating in free space

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Yijie Shen ◽  
Yaonan Hou ◽  
Nikitas Papasimakis ◽  
Nikolay I. Zheludev
Keyword(s):  
Electromagnetic Fields ◽  
Information Transfer ◽  
Degrees Of Freedom ◽  
Extended Family ◽  
Ultrafast Optics ◽  
Single Cycle ◽  
Electromagnetic Excitation ◽  
Electromagnetic Pulses ◽  
Light Pulses ◽  
Transient Electromagnetic

AbstractTopological complex transient electromagnetic fields give access to nontrivial light-matter interactions and provide additional degrees of freedom for information transfer. An important example of such electromagnetic excitations are space-time non-separable single-cycle pulses of toroidal topology, the exact solutions of Maxwell’s equations described by Hellwarth and Nouchi in 1996 and recently observed experimentally. Here we introduce an extended family of electromagnetic excitation, the supertoroidal electromagnetic pulses, in which the Hellwarth-Nouchi pulse is just the simplest member. The supertoroidal pulses exhibit skyrmionic structure of the electromagnetic fields, multiple singularities in the Poynting vector maps and fractal-like distributions of energy backflow. They are of interest for transient light-matter interactions, ultrafast optics, spectroscopy, and toroidal electrodynamics.

scholarly journals Supertoroidal light pulses: Propagating electromagnetic skyrmions in free space

2021 ◽  
Author(s):  
Yijie Shen ◽  
Yaonan Hou ◽  
Nikitas Papasimakis ◽  
Nikolay Zheludev
Keyword(s):  
Electromagnetic Fields ◽  
Information Transfer ◽  
Degrees Of Freedom ◽  
Ultrafast Optics ◽  
Single Cycle ◽  
Electromagnetic Excitation ◽  
Electromagnetic Pulses ◽  
Light Pulses ◽  
New Family ◽  
Transient Electromagnetic

Abstract Topologically complex transient electromagnetic fields give access to nontrivial light-matter interactions and provide additional degrees of freedom for information transfer. An important example of such electromagnetic excitations are space-time non-separable single-cycle pulses of toroidal topology, the exact solutions of Maxwell described by Hellwarth and Nouchi in 1996 and recently observed experimentally. Here we introduce a new family of electromagnetic excitation, the supertoroidal electromagnetic pulses, in which the Hellwarth-Nouchi pulse is just the simplest member. The supertoroidal pulses exhibit skyrmionic structure of the electromagnetic fields, multiple singularities in the Poynting vector maps and fractal-like distributions of energy backflow. They are of interest for transient light-matter interactions, ultrafast optics, spectroscopy, and toroidal electrodynamics.

scholarly journals Imaging Internal Defects with Synthetic and Experimental Data

2019 ◽  
Vol 2019 ◽  
pp. 1-13
Author(s):  
Hongwei Zhou ◽  
Guanghui Hu ◽  
Ling Ma
Keyword(s):  
Experimental Data ◽  
Electromagnetic Scattering ◽  
Scattering Problem ◽  
Quantitative Agreement ◽  
Internal Defects ◽  
Electromagnetic Pulses ◽  
Kirchhoff Migration ◽  
Transient Electromagnetic ◽  
Multiple Input ◽  
Migration Method

This work concerns an inverse time-dependent electromagnetic scattering problem of imaging internal defects in a homogeneous isotropic medium. The position and cross section of the defects are detected by transient electromagnetic pulses in the case of TE polarization. We apply the Kirchhoff migration scheme to locate the position of small objects from both synthetic and experimental data. The multiple-input-multiple-out scheme is used to recover extended scatterers from the data generated by the software GprMax. Numerical experiments show that the Kirchhoff migration method is not only efficient but also robust with respect to polluted data at high noise levels. Experimental results show good quantitative agreement with numerical simulations.

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