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From the Rose-DuBois Ansatz of Hot Spot Fields to the Instanton Solution: a Pedestrian Presentation
Philippe Mounaix
https://arxiv.org/abs/2505.22097 https…

From the Rose-DuBois Ansatz of Hot Spot Fields to the Instanton Solution: a Pedestrian Presentation
This paper gives a pedestrian presentation of some technical results recently published in mathematical physics with non-trivial implications for laser-plasma interaction. The aim is to get across the main results without going into the details of the calculations, nor offering a specialist's user guide, but by focusing conceptually on how these results modify the commonly-held description -- in terms of laser hot spot fields -- of backscattering instabilities with a spatially smoothed laser be…

The Multi-Wavelength Context of Delayed Radio Emission in TDEs: Evidence for Accretion-Driven Outflows
Kate D. Alexander, Raffaella Margutti, Sebastian Gomez, Michael Stroh, Ryan Chornock, Tanmoy Laskar, Y. Cendes, Edo Berger, Tarraneh Eftekhari, Noah Franz, Aprajita Hajela, B. D. Metzger, Giacomo Terreran, Michael Bietenholz, Collin Christy, Fabio de Colle, S. Komossa, Matt Nicholl, Enrico Ramirez-Ruiz, Richard Saxton, Genevieve Schroeder, Peter Williams, William Wu

The Multi-Wavelength Context of Delayed Radio Emission in TDEs: Evidence for Accretion-Driven Outflows
Recent observations presented in Cendes et al. (2024a) show that optically selected tidal disruption events (TDEs) commonly produce delayed radio emission that can peak years post-disruption. Here, we explore the multi-wavelength properties of a sample of radio-observed optically selected TDEs to shed light on the physical process(es) responsible for the late-rising radio emission. We combine new late-time X-ray observations with archival optical, UV, X-ray, and radio data to conclude that a di…

Synchronising DER inverters to weak grid using Kalman filter and LQR current controller
Phuoc Sang Nguyen, Ghavameddin Nourbakhsh, Gerard Ledwich
https://arxiv.org/abs/2507.01300 …

Synchronising DER inverters to weak grid using Kalman filter and LQR current controller
Grid-following (GFL) inverters are commonly used for integrating renewable energy sources into power grids. However, the dynamic performance of GFL models can be significantly impacted by the Phase-Locked Loop (PLL) in a weak grid, leading to instability due to inaccuracies in grid source phase angle estimation. The proposed method in this manuscript replaces the PLL with an Advanced Angle Estimation based Kalman Filter including a Linear Quadratic Regulator (LQR) controller of the GFL. This me…

Unveiling Zn incorporation in CuInS$_2$ quantum dots: X-ray and optical analysis of doping effects, structural modifications and surface passivation
Andr\'es Burgos-Caminal, Brener R. C. Vale, Andr\'e F. V. Fonseca, Juan F. Hidalgo, Elisa P. P. Collet, L\'azaro Garc\'ia, V\'ictor Vega-Mayoral, Sa\"ul Garcia-Orrit, Iciar Arnay, Juan Cabanillas-Gonz\'alez, Laura Simonelli, Ana Fl\'avia Nogueira, Marco Ant\^onio Schiavon, Thomas J. Penfold, Lazaro A. Padil…

Unveiling Zn incorporation in CuInS$_2$ quantum dots: X-ray and optical analysis of doping effects, structural modifications and surface passivation
Quantum dots (QDs) exhibit unique properties arising from their reduced size and quantum confinement effects, including exceptionally bright and tunable photoluminescence. Among these, CuInS$_{2}$ QDs have gained significant attention owing to their remarkable broadband emission, making them highly desirable for various optoelectronic applications requiring efficient luminescent nanomaterials. However, maximizing radiative recombination in CuInS$_{2}$ QDs often necessitates minimizing intragap …

This https://arxiv.org/abs/2502.10897 has been replaced.
initial toot: https://mastoxiv.page/@arXiv_…

Network of velocity-coherent filaments formed by supersonic turbulence in a very-high-velocity HI cloud
The warm neutral medium (WNM) was thought to be subsonically/transonically turbulent, and it lacks a network of intertwined filaments that are commonly seen in both molecular clouds and cold neutral medium (CNM). Here, we report HI~21 cm line observations of a very-high-velocity (-330 km s$^{-1}$ $

Iion-motion simulations of a plasma-wakefield experiment at FLASHForward
D. Kalvik, P. Drobniak, F. Pe\~na, C. A. Lindstr{\o}m, J. Beinortaite, L. Boulton, P. Caminal, J. Garland, G. Loisch, J. B. Svensson, M. Th\'evenet, S. Wesch, J. Wood, J. Osterhoff R. D'Arcy, S. Diederichs
https://arxiv.org/abs/2505.24299

Iion-motion simulations of a plasma-wakefield experiment at FLASHForward
In plasma-based acceleration, an ultra-relativistic particle bunch$\unicode{x2014}$or an intense laser beam$\unicode{x2014}$is used to expel electrons from its propagation path, forming a wake that is devoid of electrons. The ions, being significantly more massive, are often assumed to be stationary. However, both theory and simulations suggest that any sufficiently dense electron bunch can trigger ion motion, and its effect must be taken into account. We simulate beam-driven plasma wakefields …