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This chapter contains sections titled:
Introduction
Process Description
Challenges with 24/7 Production
Cleaning Cycle Benefit, Extent and Recovery
Ceramic Foam Filter Life
Sustainment and Product Improvement
Further Development and Actions
Conclusions
Acknowledgements
This chapter contains sections titled:
Introduction
Theoretical Investigation
MetalVision Basics
MetalVision: Imaging or Sonar?
MetalVision: Attenuation
LiMCA®: Basics
Electrical Inclusion Detection
Other Non‐Continuous Measurements
Practical Validation of the MetalVision System
Further Experience with the MV20/20 System
Conclusions
Acknowledgements
We have used the classical Hall Effect to electrically characterize indium tin oxide (ITO) films grown by two different techniques on silica substrates. ITO films have the unique property that they can be both electrically conducting (and to be used for a gate electrode for example) as well as optically transparent (at least in the visible part of the spectrum). In the near infrared (NIR) the transmission...
We propose a graphene transfer method based on chemical vapor deposited (CVD) graphene grown on copper foils. This transfer method utilizes a combination of a silicone elastomer (PDMS) and different intermediate polymer layers depending on the process requirements. We use polystyrene and polystyrene/photoresist intermediary layers for dry and wet graphene release. PMMA intermediary layer is applied...
The ionosphere is a dynamic medium which can interact with electromagnetic waves and cause delay and refraction/diffraction effects. Ionospheric structures occur with different scale in different locations. Therefore, the correct imaging of the location and scale of those structures is of particular importance. Computerized ionospheric tomography uses observations from ground-based receivers to reconstruct...
Employing high frequency approximations, Rawlins [1] developed some simple formulae for the scattering of an E-polarised plane wave by an infinite rectangular cylindrical structure, on which an impedance boundary condition is enforced. An integral equation approach for which a rapidly convergent quadrature scheme is described. In order to validate Rawlins' solutions, the computed scattered far-field...
During the past 15 years the University of Bath has been developing an ionospheric tomography algorithm known as the Multi-Instrument Data Analysis System (MIDAS). The aim of this document is to describe the approach which will extend MIDAS algorithms into a full physics forecasting system. This approach employs the utilization of data ingestion techniques known as Data Assimilation (DA). The presented...
Graphene has extraordinary electronic and optoelectronic properties such as high carrier mobility, large charge-carrier concentrations, tunability via electrostatic doping, wavelength-independent absorption, and relatively low dissipation rates [1]. The combination of its electro-optical properties with its manufacturability and CMOS integrability makes graphene an extremely promising candidate for...
Indirect microwave holographic techniques offer a simple, low cost technique for a range of microwave measurements including the determination of antenna characteristics and the ability to provide good quality images of passive objects. This work provides a brief outline of the basic theory of indirect microwave holography and how it can be used for the reconstruction of scattered complex fields at...
Pressure sensors based on suspended graphene membranes have shown extraordinary sensitivity for uniaxial strains, which originates from graphene's unique electrical and mechanical properties and thinness [1]. This work compares through both theory and experiment the effect of cavity shape and size on the sensitivity of piezoresistive pressure sensors based on suspended graphene membranes. Further,...
A numerical study of the scattering of an E-polar-ised plane wave by an infinite cylindrical structure, on which an impedance boundary condition is enforced, is described. It employs an integral equation formulation for which a rapidly convergent quadrature scheme is developed. The computed scattered far-field patterns are compared with the results of Rawlins [1] for rectangular structures obtained...
Failure Mode and Effects Analysis is a common analytical method utilized in product development, manufacturing, quality control, and maintenance to better understand potential failure modes and the effects that design changes or process changes would have on those failure modes. Valdes [1] has proposed an adaptation of FMEA suitable for analyzing hazards and the effects of various hazard mitigation...
Intense pulsed active detection (IPAD, [1]; also see presentations at this conference by B.V. Weber, et al., D.P Murphy et al., S.B. Swanekamp et al. and J.C. Zier, et al.) has been proposed as a means of detecting contraband fissile material from a distance. In this approach, an intense bremsstrahlung pulse is used to induce photo fission, the products of which are detected. In this work, we report...
RITS-6 is an inductive voltage adder based accelerator used for radiographic diode research and development. A recent experiment was conducted to demonstrate that a negative polarity induction voltage adder could operate in positive polarity, at reduced voltage, with minimal reconfiguration and maintenance. Circuit simulations, 2-D electrostatic field calculations, and particle-in-cell simulations...
Intense pulsed active detection (IPAD) has been proposed as a means of detecting contraband fissile material using an intense bremsstrahlung pulse to induce photofission. (S.B. Swanekamp, et al., IEEE Trans. Nucl. Sci. 58, 2011, pp. 2047–2056; also see presentations at this conference by B.V. Weber, et al., S.B. Swanekamp, et al., and J.C. Zier, et al.) A number of pulsed power technologies were evaluated...
RITS-6 is an inductive voltage adder (IVA) based accelerator used for radiographic diode research and development1. Experiments have been conducted with various radiographic diodes with diode voltages of 5–11 MV. A recent experiment was conducted to demonstrate that a negative polarity IVA could operate in positive polarity, at reduced voltage, with minimal reconfiguration and maintenance. Circuit...
Intense pulsed active detection (IPAD, S.B. Swanekamp, et al., IEEE Trans. Nucl. Sci. 58, 2011, pp. 2047–2056; also see presentations at this conference by B.V. Weber, et al., S.B. Swanekamp, et al., and J.C. Zier, et al.) has been proposed as a means of detecting contraband fissile material. In this approach, an intense bremsstrahlung pulse is used to induce photofission, the products of which are...
Despite exceptional intrinsic properties of graphene, field effect transistors with graphene channels (GFETs) are limited by the absence of an electronic band gap. The resulting low ION-IOFF ratio and low output resistance makes GFETs unsuitable for logic applications [1] and limits radio frequency (RF) applications [2]. We will present a graphene-based electronic device in which the 0 eV band gap...
An Induction Voltage Adder (IVA) is described that comprises six induction cells like those of RITS [1] and six pulse-forming-lines (pfls) like those of Hydrus [2]. The pfls are negatively-charged through a coaxial oil line fed from one end by a 15-stage Marx with 2.6 μF 100 kV capacitors. The IVA feeds a negative pulse to an electron diode through a 5m long output vacuum coax. Simulations for an...
The use of indirect holographic techniques for antenna testing has been shown to offer a simple, low cost scalar technique for the reconstruction of complex antenna aperture fields. This work extends the use of indirect holography to the imaging of objects. This work provides a brief outline of the basic theory of indirect microwave holography and how it can be used for the reconstruction of scattered...
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