Roy Jorgenson
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View article: Method and apparatus for electrical cable testing by pulse-arrested spark discharge
Method and apparatus for electrical cable testing by pulse-arrested spark discharge Open
A method for electrical cable testing by Pulse-Arrested Spark Discharge (PASD) uses the cable response to a short-duration high-voltage incident pulse to determine the location of an electrical breakdown that occurs at a defect site in the…
View article: Three-Dimensional Electromagnetic High Frequency Concave Cavity Scars
Three-Dimensional Electromagnetic High Frequency Concave Cavity Scars Open
This report examines the localization of high frequency electromagnetic fields in general three-dimensional cavities along periodic paths between opposing sides of the cavity. The focus is on the case where the mirrors at the ends of the o…
View article: TATB Sensitivity to Shocks from Electrical Arcs
TATB Sensitivity to Shocks from Electrical Arcs Open
Use of insensitive high explosives (IHEs) has significantly improved ammunition safety because of their remarkable insensitivity to violent cook‐off, shock and impact. Triamino‐trinitrobenzene (TATB) is the IHE used in many modern munition…
View article: Kinetic Unstructured Finite Element PIC-DSMC Simulation of Ultra-Fast Pin-to-Plane Discharge in Air.
Kinetic Unstructured Finite Element PIC-DSMC Simulation of Ultra-Fast Pin-to-Plane Discharge in Air. Open
International audience
View article: Massively parallel frequency domain electromagnetic simulation codes
Massively parallel frequency domain electromagnetic simulation codes Open
This paper provides an overview of the electromagnetic frequency domain simulation capabilities of the Electromagnetic Theory department at Sandia National Laboratories via a description of two of its codes. EIGER is a Method of Moments co…
View article: Quality factor assessment of finite-size all-dielectric metasurfaces at the magnetic dipole resonance
Quality factor assessment of finite-size all-dielectric metasurfaces at the magnetic dipole resonance Open
Recently there has been a large interest in achieving metasurface resonances with large quality factors. In this article, we examine metasurfaces that comprised a finite number of magnetic dipoles oriented parallel or orthogonal to the pla…
View article: Antenna Loading Impact on the Coupling Response of a Slotted Cylindrical Cavity
Antenna Loading Impact on the Coupling Response of a Slotted Cylindrical Cavity Open
This report details the effect of antenna loading on the interior near - field response of a resonating cylindrical cavity characterized by a leaky aperture. We find a large field variation within the cavity when a long antenna is introduc…
View article: Radiation-MHD simulations for the development of a spark discharge channel.
Radiation-MHD simulations for the development of a spark discharge channel. Open
The growth of a cylindrical s park discharge channel in water and Lexan is studied using a series of one - dimensional simulations with the finite - element radiation - magnetohydrodynamics code ALEGRA. Computed solutions are analyzed in o…
View article: Simulations of realistic multifunctional nanoantenna enabled detectors
Simulations of realistic multifunctional nanoantenna enabled detectors Open
The goal of this paper is to investigate full-wave simulations of realistic implementations of multifunctional nanoantenna enabled detectors (NEDs). We realize a 2×2 pixelated array structure that supports two wavelengths of operation. Aft…
View article: Realistic Full Wave Modeling of Focal Plane Array Pixels
Realistic Full Wave Modeling of Focal Plane Array Pixels Open
Here, we investigate full-wave simulations of realistic implementations of multifunctional nanoantenna enabled detectors (NEDs). We focus on a 2x2 pixelated array structure that supports two wavelengths of operation. We design each resonat…
View article: Formulation And Implementation of A 1.75D Streamer Model
Formulation And Implementation of A 1.75D Streamer Model Open
Streamers are a type of ionization wave occurring during the early time phase of a gas discharge. They are typically launched when the evolving space charge of an electron avalanche reaches a certain critical level, beyond which the field …
View article: A bound on electromagnetic penetration through a slot aperture with backing cavity
A bound on electromagnetic penetration through a slot aperture with backing cavity Open
This report examines bounds on the penetrant power through ports of entry into a conductive cavity. We first replace the cavity by a load and consider the maximum power transfer properties of an antenna or an aperture. We consider how limi…
View article: HIGH-VOLTAGE ATMOSPHERIC BREAKDOWN ACROSS INTERVENING RUTILE DIELECTRICS.
HIGH-VOLTAGE ATMOSPHERIC BREAKDOWN ACROSS INTERVENING RUTILE DIELECTRICS. Open
This report documents work conducted in FY13 on electrical discharge experiments performed to develop predictive computational models of the fundamental processes of surface breakdown in the vicinity of high-permittivity material interface…
View article: Diffusion Through Single And Double Layer Shields And Induced Voltages From Low Frequency Electromagnetic Environments
Diffusion Through Single And Double Layer Shields And Induced Voltages From Low Frequency Electromagnetic Environments Open
The diffusion through shells consisting of either a single conducting or double conducting layers are examined. Exterior drives resulting from Electromagnetic Radiation (EMR), Electromagnetic Pulse (EMP), nearby (indirect) lightning, and D…
View article: High-Frequency Electromagnetic Scarring in Three-Dimensional Axisymmetric Convex Cavities
High-Frequency Electromagnetic Scarring in Three-Dimensional Axisymmetric Convex Cavities Open
This study examines the localization of high-frequency electromagnetic fields in three-dimensional axisymmetric cavities along periodic paths between opposing sides of the cavity. When these orbits lead to unstable localized modes, they ar…
View article: Spark Breakdown Threshold in Non-Uniform Fields
Spark Breakdown Threshold in Non-Uniform Fields Open
We develop a criterion for spark breakdown in non-uniform field geometries with positive polarity and small electrode separations so that breakdown evolves without the formation of a leader. We arrive at the spark-breakdown criterion by fr…