Publications associées à Divergence de faisceau

Microsecond melting and revitrification of cryo samples with a correlative light-electron microscopy approach

Marcel Drabbels, Gabriele Bongiovanni, Oliver Florian Harder

We have recently introduced a novel approach to time-resolved cryo-electron microscopy (cryo-EM) that affords microsecond time resolution. It involves melting a cryo sample with a laser beam to allow dynamics of the embedded particles to occur. Once the la ...

2022

Structured light engineering using a photonic nanojet

Toralf Scharf, Maryam Yousefi, Daniel Necesal

In this Letter, we present the photonic nanojet as a phenomenon in a structured light generator system that is implemented to modify the source focal spot size and emission angle. The optical system comprises a microlens array that is illuminated by a focu ...

OPTICAL SOC AMER2021

Rapid melting and revitrification as an approach to microsecond time-resolved cryo-electron microscopy

Marcel Drabbels, Ulrich Lorenz, Pavel Olshin, Jonathan Mark Voss, Oliver Florian Harder

Proteins typically undergo dynamics on the microsecond to millisecond timescale, which is much faster than the time resolution of cryo-electron microscopy. Here, we propose a novel approach for microsecond time-resolved cryo-electron microscopy that involv ...

2021

Adversarial Laser Beam: Effective Physical-World Attack to DNNs in a Blink

Shaokai Ye, Yuan He

Though it is well known that the performance of deep neural networks (DNNs) degrades under certain light conditions, there exists no study on the threats of light beams emitted from some physical source as adversarial attacker on DNNs in a real-world scena ...

IEEE COMPUTER SOC2021

Design and Thermal-Structural Analyses of Ancillary Components for the Optical Steering Mirror (M4) for the ITER ECH Upper Launcher

Timothy Goodman, René Chavan, Matteo Vagnoni

Each of the four ITER Electron Cyclotron Heating Upper Launcher (ECHUL) features eight transmission lines (TLs) that are used to inject 170-GHz microwave power into the plasma at a level of up to 1.31 MW (at the TL diamond window) per line. The millimeter ...

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC2020

Beam duct for the 1 MW neutral beam injector on TCV

Basil Duval, Stefano Coda, Yves Martin, Alexander Karpushov, Matthieu Toussaint, Frédéric Dolizy, Roberto Maurizio

The 1MW power of the neutral beam injector (NBI) enters the plasma of the Tokamak a Configuration Variable (TCV) through a duct. The original beam propagation model predicted a maximal heat flux on the internal faces of the duct below 350 kW/m(2), leading ...

2020

Update of ion-optical system of neutral beam of Tokamak a Configuration Variable

Alexander Karpushov

An injector of fast deuterium atoms for plasma heating was designed and installed at the Tokamak a Configuration Variable (TCV). The neutral beam can deliver 1 MW power to the plasma in 2 s pulses. An ion beam of the injector is formed by a triode multisli ...

AMER INST PHYSICS2020

A miniaturized selective laser melting device for operando X-ray diffraction studies

Helena Van Swygenhoven, Steven Van Petegem, Nicola Casati, Samy Hocine

We report on the development of a miniaturized device for operando X-ray diffraction during laser 3D printing. The printing chamber has a size of only 130 x 135 x 34 mm(3) and is optimized to be installed at synchrotron beamlines. We describe the design co ...

ELSEVIER2020

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Divergence de faisceau

Microsecond melting and revitrification of cryo samples with a correlative light-electron microscopy approach

Structured light engineering using a photonic nanojet

Laser treatment systems and methods for in-situ laser shock peening (lsp) treatment of parts during production thereof by a selective laser sintering or melting (sls/slm) process, and additive manufacturing systems and methods implementing the same

Rapid melting and revitrification as an approach to microsecond time-resolved cryo-electron microscopy

Adversarial Laser Beam: Effective Physical-World Attack to DNNs in a Blink

Design and Thermal-Structural Analyses of Ancillary Components for the Optical Steering Mirror (M4) for the ITER ECH Upper Launcher

Beam duct for the 1 MW neutral beam injector on TCV

Update of ion-optical system of neutral beam of Tokamak a Configuration Variable

Elastic properties of self-organized nanogratings produced by femtosecond laser exposure of fused silica

A miniaturized selective laser melting device for operando X-ray diffraction studies

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Chattez avec Graph Search

Structured light engineering using a photonic nanojet

Adversarial Laser Beam: Effective Physical-World Attack to DNNs in a Blink

Design and Thermal-Structural Analyses of Ancillary Components for the Optical Steering Mirror (M4) for the ITER ECH Upper Launcher

Microsecond melting and revitrification of cryo samples with a correlative light-electron microscopy approach

Laser treatment systems and methods for in-situ laser shock peening (lsp) treatment of parts during production thereof by a selective laser sintering or melting (sls/slm) process, and additive manufacturing systems and methods implementing the same

Rapid melting and revitrification as an approach to microsecond time-resolved cryo-electron microscopy

A miniaturized selective laser melting device for operando X-ray diffraction studies

Update of ion-optical system of neutral beam of Tokamak a Configuration Variable

Elastic properties of self-organized nanogratings produced by femtosecond laser exposure of fused silica

Beam duct for the 1 MW neutral beam injector on TCV