Maximal charge injection of a uniform separated electron pulse train in a drift space

Liu, Y. L.; Zhang, P.; Chen, S. H.; Ang, L. K.

doi:10.1103/physrevstab.18.123402

Cited by 4 publications

(4 citation statements)

References 29 publications

(48 reference statements)

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“…Non-neutral plasma systems arise in a variety of physical contexts ranging from astrophysics [1][2][3]; accelerator technologies [4][5][6][7]; ion and neutron production [8][9][10][11][12][13]; sources for electron and ion microscopy [14,15]; to high power vacuum electronics [16][17][18]. Understanding of the dynamics of spreading of such systems is critical to the design of next generation technologies, and simple analytic models are particularly helpful for instrument design.…”

Section: Introductionmentioning

confidence: 99%

Dynamical bunching and density peaks in expanding Coulomb clouds

Zerbe

Xiang

Ruan

et al. 2018

Phys. Rev. Accel. Beams

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Expansion dynamics of single-species, non-neutral clouds, such as electron bunches used in ultrafast electron microscopy, show novel behavior due to high acceleration of particles in the cloud interior. This often leads to electron bunching and dynamical formation of a density shock in the outer regions of the bunch. We develop analytic fluid models to capture these effects, and the analytic predictions are validated by PIC and N-particle simulations. In the space-charge dominated regime, two and three dimensional systems with Gaussian initial densities show bunching and a strong shock response, while one dimensional systems do not; moreover these effects can be tuned using the initial particle density profile and velocity chirp.

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Section: Introductionmentioning

confidence: 99%

Dynamical bunching and density peaks in expanding Coulomb clouds

Zerbe

Xiang

Ruan

et al. 2018

Phys. Rev. Accel. Beams

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“…The model was also extended to study multi pulse electron beam propagation in a drift space. 147 The model may be useful in the design of Smith-Purcell radiation, [148][149][150][151] multiple pulse electron beams for time resolved electron microscopy, 152 free electron lasers, 153 or other applications with charge pulse trains over a wide range of parameters.…”

Section: Time Dependent Space Charge Limited Transportmentioning

confidence: 99%

100 years of the physics of diodes

Zhang

Valfells

Ang

et al. 2017

Applied Physics Reviews

186

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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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“…2013; Griswold, Fisch & Wurtele 2012; Rokhlenko 2015; Liu et al. 2015 a , b ; Griswold & Fisch 2016); and (viii) comparison of theory and modelling with experiments (Spindt et al. 1976; Das & Jagadeesh 1981; Teague 1986; Cahay et al.…”

Section: Quantum Tunnelling Currentmentioning

confidence: 99%

“…2015; Rokhlenko 2015; Liu et al. 2015 a , b ; Griswold & Fisch 2016), all under ultrafast conditions. It is important to link ultrafast strong-field laser physics in atoms and gaseous media to that in nanoclusters, solid-state surfaces and nanostructures (Corkum et al.…”

Section: Ultrafast Electron Emissionmentioning

confidence: 99%

Ultrafast and nanoscale diodes

Zhang

Lau

2016

J. Plasma Phys.

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Charge carrier transport across interfaces of dissimilar materials (including vacuum) is the essence of all electronic devices. Ultrafast charge transport across a nanometre length scale is of fundamental importance in the miniaturization of vacuum and plasma electronics. With the combination of recent advances in electronics, photonics and nanotechnology, these miniature devices may integrate with solid-state platforms, achieving superior performance. This paper reviews recent modelling efforts on quantum tunnelling, ultrafast electron emission and transport, and electrical contact resistance. Unsolved problems and challenges in these areas are addressed.

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Maximal charge injection of a uniform separated electron pulse train in a drift space

Cited by 4 publications

References 29 publications

Dynamical bunching and density peaks in expanding Coulomb clouds

Dynamical bunching and density peaks in expanding Coulomb clouds

100 years of the physics of diodes

Ultrafast and nanoscale diodes

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