<i>Narrow Angle Electron Guns and Cathode Ray Tubes.</i>

Moss, Hilary; Simpson, J. A.

doi:10.1063/1.3035803

Cited by 21 publications

(6 citation statements)

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“…For example, the size of the electron beam defines the smallest possible area over which the control system has authority. Moss [27] provides electron gun design tools in the form of nomographs that can be used to estimate the minimum spot sizes in a given system given the energy, current requirements, and relative system dimensions. It is important to realize, however, that the electron beam spot size may not define the resolution of the control system in cases where there is mechanical coupling between various locations in a structure, which is a characteristic of shell structures with significant curvatures.…”

Section: Discussionmentioning

confidence: 99%

Noncontact Electron Gun Actuation of a Piezoelectric Polymer Thin Film Bimorph Structure

Martin

Main

2002

Journal of Intelligent Material Systems and Structures

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Noncontact electron gun actuation of a bimorphmirror structure composed of two polyvinylidene fluoride layers is demonstrated. The electric field is applied to the piezoelectric structure by controlling the potential of a nickel-copper electrode on one side of the bimorph mirror and subjecting the opposite, bare side of the bimorph to an electron flux. The electrode also serves as the reflecting surface of the thin film mirror structure. Significant characteristics of this actuation approach are demonstrated, including the ability to address discrete areas of the continuous mirror without affecting the global mirror shape and the persistence of the shape changes after the electron beam is turned off.

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Section: Discussionmentioning

confidence: 99%

Noncontact Electron Gun Actuation of a Piezoelectric Polymer Thin Film Bimorph Structure

Martin

Main

2002

Journal of Intelligent Material Systems and Structures

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“…There is a significant amount of information available in the cathode ray tube literature about how electron gun currents, ranges, and achievable spot diameters scale across system size and electron energy. Moss [11] presents a variety of useful nomographs that make feasibility assessments fairly straightforward.…”

Section: Methodsmentioning

confidence: 99%

Strain and Current Responses During Electron Flux Excitation of Piezoelectric Ceramics

Hadinata

Main

2002

Journal of Intelligent Material Systems and Structures

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The electric field induced strain in piezoelectric materials subjected to an electron flux is examined in this paper. An analysis using quantum mechanics indicates that stable and controllable strains with very low current draw should be achievable over a range of positive and negative control potentials. The model also predicts instability in the internal electric field at larger negative potentials.The model was evaluated by observing the strain output of PZT5h plates subjected to an electron flux on one face and voltage inputs from a single electrode on the opposite face. The strain response and current flow were measured as a function of electrode potential and electron energy. All of the significant predictions of the model were verified by the experimental results. Further experiments were performed to examine the time response of the strain induced in the plate. It was found that the location and potential of the electron collector dramatically influences the dynamic response of the system.

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“…[7][8][9][10][11][12][13] Because of its simplicity and accuracy, this capacitance or transit time model is of great utility to study a short pulse diode, 12 and more recently the quantum regime. 89 In fact, though only with ad hoc justification, it has long been noticed by electron gun and (cathode ray tube) CRT designers that the SCL beam creation is ruled only by the vacuum electric field on the cathode (without beam) E c and is based on the very simple scaling law [90][91][92][93][94][95][96][97][98]…”

Section: General Scaling With Cathode Vacuum Electric Fieldmentioning

confidence: 99%

100 years of the physics of diodes

Zhang

Valfells

Ang

et al. 2017

Applied Physics Reviews

190

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The Child-Langmuir Law (CL), discovered a century ago, gives the maximum current that can be transported across a planar diode in the steady state. As a quintessential example of the impact of space charge shielding near a charged surface, it is central to the studies of high current diodes, such as high power microwave sources, vacuum microelectronics, electron and ion sources, and high current drivers used in high energy density physics experiments. CL remains a touchstone of fundamental sheath physics, including contemporary studies of nanoscale quantum diodes and nano gap based plasmonic devices. Its solid state analog is the Mott-Gurney law, governing the maximum charge injection in solids, such as organic materials and other dielectrics, which is important to energy devices, such as solar cells and light emitting diodes. This paper reviews the important advances in the physics of diodes since the discovery of CL, including virtual cathode formation and extension of CL to multiple dimensions, to the quantum regime, and to ultrafast processes. We review the influence of magnetic fields, multiple species in bipolar flow, electromagnetic and time dependent effects in both short pulse and high frequency THz limits, and single electron regimes. Transitions from various emission mechanisms (thermionic-, field-, and photoemission) to the space charge limited state (CL) will be addressed, especially highlighting the important simulation and experimental developments in selected contemporary areas of study. We stress the fundamental physical links between the physics of beams to limiting currents in other areas, such as low temperature plasmas, laser plasmas, and space propulsion.

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Narrow Angle Electron Guns and Cathode Ray Tubes.

Cited by 21 publications

References 0 publications

Noncontact Electron Gun Actuation of a Piezoelectric Polymer Thin Film Bimorph Structure

Noncontact Electron Gun Actuation of a Piezoelectric Polymer Thin Film Bimorph Structure

Strain and Current Responses During Electron Flux Excitation of Piezoelectric Ceramics

100 years of the physics of diodes

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