72 citations · 288 across the 11 of their papers we have counts for
11 papers
Simulation of short pulse photoemission in a micro-diode with implications for optimal beam brightness
Hákon Örn Árnason, Kristinn Torfason, Andrei Manolescu +1
Molecular dynamics simulations, with full Coulomb interaction are used to model short-pulse photoemission from a finite area in a microdiode. We demonstrate three emission regimes,…
Molecular Dynamics Simulations of Mutual Space-Charge Effect between Planar Field Emitters
Hakon Valur Haraldsson, Kristinn Torfason, Andrei Manolescu +1
Molecular dynamics simulations, with full Coulomb interaction and self-consistent field emission, are used to examine mutual space-charge interactions between beams originating fro…
Dynamics of a Field Emitted Beam from a Microscopic Inhomogeneous Cathode
Kristinn Torfason, Anna Sitek, Andrei Manolescu +1
We investigate by molecular dynamics simulations [arXiv:1412.4537 [physics.plasm-ph], arXiv:1608.06789 [physics.plasm-ph]] a beam of electrons released via field emission from a pl…
Space-Charge Limited Current from a Finite Emitter in Nano- and Microdiodes
Johannes Bergur Gunnarsson, Kristinn Torfason, Andrei Manolescu +1
We simulate numerically the classical charge dynamics in a microscopic, planar, vacuum diode with a finite emitter area and a finite number of electrons in the gap. We assume elect…
Space-charge effects in the field-assisted thermionic emission from nonuniform cathodes
Anna Sitek, Kristinn Torfason, Andrei Manolescu +1
We use computational simulations to study the electron emission and propagation in planar vacuum diodes. We show how space-charge affects thermionic emission from cathodes with two…
Molecular Dynamics Simulations of Field Emission From a Prolate Spheroidal Tip
Kristinn Torfason, Agust Valfells, Andrei Manolescu
High resolution molecular dynamics simulations with full Coulomb interactions of electrons are used to investigate field emission from a prolate spheroidal tip. The space charge li…
Terahertz pulsed photogenerated current in microdiodes at room temperature
Marjan Ilkov, Kristinn Torfason, Andrei Manolescu +1
Space-charge modulation of the current in a vacuum diode under photoemission leads to the formation of beamlets with time periodicity corresponding to THz frequencies. We investiga…
Molecular Dynamics Simulations of Field Emission From a Planar Nanodiode
Kristinn Torfason, Agust Valfells, Andrei Manolescu
High resolution molecular dynamics simulations with full Coulomb interactions of electrons are used to investigate field emission in planar nanodiodes. The effects of space charge…
Synchronization in arrays of vacuum microdiodes
Marjan Ilkov, Kristinn Torfason, Andrei Manolescu +1
Simulations have shown that space-charge effects can lead to regular modulation of photoemitted beams in vacuum diodes with gap sizes on the order of 1 micron and accelerating volt…
Tunability of the THz space-charge modulation in a vacuum microdiode
P. Jonsson, M. Ilkov, A. Manolescu +2
Under certain conditions, space-charge limited emission in vacuum microdiodes manifests as clearly defined bunches of charge with a regular size and interval. The frequency corresp…
Space-charge modulation in vacuum microdiodes at THz frequencies
Andreas Pedersen, Andrei Manolescu, Agust Valfells
We investigate the dynamics of a space-charge limited, photoinjected, electron beam in a microscopic vacuum diode. Due to the small nature of the system it is possible to conduct h…