The advent of multi-hz rep-rated hpm sources for effects testing places severe demands on hpm diagnostic systems, especially in field use. increased emphasis on high shot rates and the difficulty of quickly setting up and debugging the necessary diagnostic instrumentation results in field… More

Next generation hpm susceptibility tests will involve significantly larger test objects and anechoic chambers than those presently used. while acceptable test fidelity requires accurate simulation of battlefield-like irradiation conditions, its achievement, particularly uniform plane-wave… More

Design of high gain (>10 db) antennas suitable for radiating multi-gw, fast-risetime (

Development of high power microwave (HPM) sources for Air Force applications requires cathodes with long usable lifetimes, negligible anode-cathode (A-K) gap closure, reproducible functioning under high repetition pulsing, uniform current density, and negligible plasma/current production from nearby… More

Commercial and military uses of RF/microwave anechoic chambers to conduct electromagnetic measurements of one type or another has increased considerably in recent years. unfortunately anechoic chambers can be very expensive to build ($0.5M for small chambers, to many $M for large chambers), and… More

Due to the lack of hardware architecture standard for satellite front ends and the multitude of satellite telemetry formats, telemetry front ends can be expensive to develop and maintain-custom hardware and software solutions (unique for each satellite or station application) are often the only way… More

Virginia Power Technologies (VPT) purposes a high-efficiency, low voltage, spacecraft power converter using Gallium Arsenide (GaAs) synchronous rectifiers. High efficiency at low output voltages cannot be achieved with Schottky rectifiers because of their fixed voltage drop. Use of synchronous… More

The need exists to generate high-quality electromagnetic planewave enviroments over large assets or extended volumes for testing avionics suites installed on full-size aircraft. Previously, these conditions were realized only be using farfield ranges or large compact range configurations. We… More

Ideal anechoic chambers provide reflection free electromagnetically

The need exists to generate high fidelity electromagnetic planewave environments over large assets for the purpose of testing avionics systems on full-size aircraft in anechoic chambers. In the Phase I effort, we conducted simulations of a PlanewaveGenerator (PWG) architecture that used a genetic… More

The need exists to generate high fidelity electromagnetic planewave environments over large assets for the purpose of testing avionics systems on full-size aircraft in anechoic chambers. In the Phase I effort, we conducted simulations of a PlanewaveGenerator (PWG) architecture that used a genetic… More

A need has long existed for a capability to calculate, simulate and predict the electromagnetic field of an anechoic chamber. This capability is realized in Voss Scientific's BAC-SIM (Benefield Anechoic Chamber Simulation Software), but the ultimate goalof perfect simulation has proved challenging.… More

As HPM sources evolve towards actual use, there exists a critical need to determine system susceptibilities to HPM prior to deployment. We propose to design and implement a lightweight, modular, ruggedized narrowband test system appropriate to bothoutdoor field and indoor chamber testing. A total… More

For two decades the US AFRL, and predecessors, have vigorously pursued development of High Power Microwave (HPM) generators. Less effort has been expended to develop compatible high power-capable antennas, though the recent DE-ATAC study identifiedantennas as a top priority in HPM DE research. We… More

Both US critical infrastructure and military electronic systems may be vulnerable to threats posed by HPM weapons. To assess the level of vulnerability, as an aid in electromagnetic hardening, and as a surrogate for foreign devices, a tunable, configurable, maintainable, and mobile HPM source is… More

We propose to develop a new narrowband antenna type, termed the "Split-Waveguide Antenna (SWA)," which meets AFRL requirements for high peak power operation with multiple waveguide feeds in a compact, lightweight geometry appropriate to munition-class size and shape factor constraints. The SWA… More

Traditionally, T&E engineers specify instrumentation attributes through Instrumentation Support Systems (ISS), which in turn load these attributes into the instruments using custom software instrument drivers. Though this process works, it demands time consuming and costly development of… More

We propose to develop a physically robust and portable Directed Energy (DE) system that uses high voltage and high current to neutralize and disable Improvised Explosive Devices (IED) with near certainty. The EWC concept to be investigated will engage IEDs at ranges to 100 m by using a novel and… More

To support the Air Force need for a high power microwave (HPM) / high energy laser (HEL) simulation environment, we propose to develop a framework that is based on our existing HPM modeling framework, Mockingbird. Framework development will continue along Mockingbird's original design path, to… More

This proposal addresses the production of fusion-based electrical power, using a new compact high-ß plasma confinement and heating scheme developed at Princeton Plasma Physics Laboratory (PPPL). The realization of actual electrical power from the odd-parity Rotating Magnetic Field/Field-Reversed… More

Military applications for the use of directed electromagnetic energy, which include high power microwave (HPM), seek to disrupt electronic systems by exploiting non-linearity in semiconductors. While current mode second breakdown is a thermal non-linearity often exploited, it has been demonstrated… More

Voss Scientific proposes an innovative methodology to determine the susceptibility of electronic systems to electromagnetic interference. Termed the Automated Susceptibility Test Architecture (ASTA), this novel adaptive approach will result in decreased test times and potentially discover unique… More

There is a strong need to develop inexpensive and efficient pretreatment processes which can be used by the biofuel industry to make it economically viable. The process of converting to useful liquid fuel lignocellulosic biomass, which is available in abundant quantity, is hindered by the… More

ABSTRACT: We propose to develop and validate a strongly-coupled non-equilibrium plasma simulation model. Strongly coupled plasmas occur in a wide range of physical situations impacting a wide range of research and development areas connected to Air Force technology. The simulation model proposed… More

ABSTRACT: Military applications for the use of directed electromagnetic energy seek to disrupt electronic systems by exploiting non-linearity in semiconductors. While current mode second breakdown is a thermal non-linearity often exploited, it has been demonstrated that for a broad class of… More

As a stepping stone to the design and development of a 1-kHz repetition-rate, high peak and high average power OPCPA (Optical Parametric Chirped Pulse Amplifier) in Phase II, we propose to design, optimize, and test novel methods for significantly enhancing OPA conversion efficiency in a system… More

ABSTRACT: Voss Scientific proposes to develop an Automated Susceptibility Test Assembly (ASTA) which will be capable of efficiently determining preferred electromagnetic (EM) source waveforms for inducing effects in target electronic systems. This novel adaptive approach will potentially discover… More