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Charge Dynamics Electron Microscopy Nanoscale Imaging of Femtosecond Plasma Dynamics

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Non-linear MHD modelling of transients in tokamaks: a review of recent advances with the JOREK code

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Transient magneto-hydrodynamic (MHD) events like edge localized modes (ELMs) or disruptions are a concern for magnetic confinement fusion power plants. Research with the MHD code JOREK towards understanding control of such instabilities is reviewed here in ...

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Fluorescence microscopy: A statistics-optics perspective

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Femtosecond-laser direct-write photoconductive patterns on tellurite glass

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We report the formation of arbitrary photoconductive patterns made of tellurium (Te) nanocrystals by exposing a tellurite (TeO2-based) glass to femtosecond laser pulses. During this process, Te/TeO2-glass nanocomposite interfaces with photoconductive prope ...

American Physical Society (APS)2024

High-order geometric integrators for the variational Gaussian wavepacket dynamics and application to vibronic spectra at finite temperature

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Molecular quantum dynamics simulations are essential for understanding many fundamental phenomena in physics and chemistry. They often require solving the time-dependent Schrödinger equation for molecular nuclei, which is challenging even for medium-sized ...

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Ultrafast Electron Microscopy of Nanoscale Charge Dynamics in Semiconductors

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The ultrafast dynamics of charge carriers in solids plays a pivotal role in emerging optoelectronics, photonics, energy harvesting, and quantum technology applications. However, the investigation and direct visualization of such nonequilibrium phenomena re ...

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Optical properties of Makrofol under various alpha fluences

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The optical properties of Makrofol samples are investigated under various fluences of alpha exposure (2 MeV at 5×102, 103, 5×103, 104, 5×104, 105, 5×105 and 106 alphas.cm2 alongside the unirradiated ones (pristine). Several analyses, including UV–visible, ...

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In Situ and Time-Resolved Transmission Electron Microscopy of Nanoscale Processes

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Electron beam-generated plasmas (EBPs) have been used to modify the surface properties. In certain applications, EBPs are transversely confined and their properties are of value to the treatment. In this paper, the characteristics of an electron beam-gener ...

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Modelling of nonneutral plasmas trapped by electric and magnetic fields relevant to gyrotron electron guns

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Gyrotrons are a class of high-power vacuum-electronics microwave sources, which are envisioned to play an important role in the domain of magnetically confined fusion plasmas. Indeed, only gyrotrons are capable of producing continuous electromagnetic waves ...

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Quantum ghost imaging can be an important tool in making optical measurements. One of the most useful aspects of ghost imaging is the unique ability to correlate two sets of independently collected information. We aim to use the principles of ghost imaging ...

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A comprehensive analysis of electron emission from a-Si:H/Al2O3 at low energies

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Recently developed microchannel plates (MCPs) based on amorphous silicon offer potential advantages with respect to glass based ones. In this context, secondary electron emission (SEE) at very low energies below 100 eV has been studied for relevant materia ...

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Optimization of X-mode electron cyclotron current drive in high-electron-temperature plasma in the EAST tokamak

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A discharge with electron temperature up to 14 keV has been achieved in EAST. Analysis of the electron cyclotron current drive (ECCD) efficiency at high electron temperature under EAST parameters is presented using C3PO/LUKE code. Simulation results show t ...

2023