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Lufthansa will 100 Inlandsflüge pro Woche streichen
Weil sich einige Strecken seit Jahren nicht mehr lohnen, will Lufthansa sie nicht mehr bedienen. Im Sommer 2026 sollen Verbindungen wegfallen.
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Generation of Ultrabrilliant Positron Beam via Superponderomotive Injection in Laser Wakefield Acceleration
Ting Sun, Zhen-Ke Dou, Ya-Qing Huang, Feng Wan, Qian Zhao, Jian-Xing Li
https://arxiv.org/abs/2508.11148

Generation of Ultrabrilliant Positron Beam via Superponderomotive Injection in Laser Wakefield Acceleration
Plasma-based acceleration of positrons attracts extensive interests due to the ultrahigh accelerating gradient and ultrashort duration, while generating wakefield positron beam by the inherent injection is still a great challenge. Here, we put forward a superponderomotive injection method of positrons in the blowout regime of laser wakefield acceleration. In this method, transverse laser fields facilitate the trapping of positrons into the laser-modulated longitudinal wakefield which dominates …

Weniger #Plastikmüll: Die Geschäfte stehen voll mit Waschmitteln, die mega, ultra, super oder strahlend sauber machen. Doch #Bekleidung wird meist nur einmal getragen und ist eher leicht verschmutzt. Wie kann man einfaches

Öko-Waschmittel: Waschpulver aus Natron, Waschsoda und Kernseife
Erfahren Sie, wie Sie umweltfreundliches Waschpulver aus Natron, Waschsoda und Kernseife selbst herstellen können. Entdecken Sie das Rezept für effektive, selbstgemachte Reinigungsmittel.

Usability vs. Cost. https://social.heise.de/@heiseautos/115055162848701309

🇺🇦 #NowPlaying on #BBC6Music's #CraigCharles
Weyes Blood:
🎵 Something To Believe
#WeyesBlood
https://weyesblood.bandcamp.com/track/something-to-believe
https://open.spotify.com/track/30TCAxiC8zVb5NVdUoUuCS

Graph Learning via Logic-Based Weisfeiler-Leman Variants and Tabularization
Reijo Jaakkola, Tomi Janhunen, Antti Kuusisto, Magdalena Ortiz, Matias Selin, Mantas \v{S}imkus
https://arxiv.org/abs/2508.10651

Graph Learning via Logic-Based Weisfeiler-Leman Variants and Tabularization
We present a novel approach for graph classification based on tabularizing graph data via variants of the Weisfeiler-Leman algorithm and then applying methods for tabular data. We investigate a comprehensive class of Weisfeiler-Leman variants obtained by modifying the underlying logical framework and establish a precise theoretical characterization of their expressive power. We then test two selected variants on twelve benchmark datasets that span a range of different domains. The experiments d…

🇺🇦 Auf #radioeins läuft...
Bulgarian Cartrader:
🎵 Revirginize
#NowPlaying #BulgarianCartrader
https://bulgariancartrader.bandcamp.com/track/revirginize
https://open.spotify.com/track/5xtMFX3WCfLQ3VRFWjwSRu

Simulation Study of Energy Chirp Induced Effects in Laser Wakefield Accelerator Driven Free Electron Laser
Shan-You Teng, Wai-Keung Lau, Shih-Hung Chen, Wei-Yuan Chiang
https://arxiv.org/abs/2508.11852

Simulation Study of Energy Chirp Induced Effects in Laser Wakefield Accelerator Driven Free Electron Laser
Beam energy compression via chicane magnets has been proved to be an effective method to reduce the slice energy spread of electron beams generated by laser wakefield accelerators (LWFAs). This technique has been widely adopted by leading research teams in experiments targeting future compact, high-gain free electron lasers (FELs). However, after energy compression, a strong beam energy chirp is introduced into the electron beam, which substantially hinders the microbunching process and impairs…

Scaling Laws in Plasma Channels for Laser Wakefield Accelerators
Tianliang Zhang, Jianyi Liu, Shuang Liu, Ran Li, Fei Li, Jianfei Hua, Wei Lu
https://arxiv.org/abs/2508.11238 ht…

Scaling Laws in Plasma Channels for Laser Wakefield Accelerators
Preformed plasma channels are essential for guiding high-power laser pulses over extended distances in laser wakefield accelerators, enabling the generation of multi-GeV electron beams for applications such as free-electron lasers and particle colliders. Above-threshold ionization heating provides a robust mechanism for creating laser-matched plasma channels across a wide parameter range, owing to its density- and geometry-independent heating effect. Establishing predictive scaling laws between…

Density and Particle Sourcing Optimization in a Helicon Plasma Source Prototype For Wakefield Accelerator Applications
Michael Zepp, Marcel Granetzny, Oliver Schmitz
https://arxiv.org/abs/2508.12929

Density and Particle Sourcing Optimization in a Helicon Plasma Source Prototype For Wakefield Accelerator Applications
Helicon plasmas are being considered as plasma sources for wakefield accelerators, subject to strict density requirements. We present various mechanisms to increase axial density homogeneity in a helicon plasma for implementation in such an accelerator. We consider various background neutral flow configurations for helicons generated with first one antenna and then two identical antennas in a 2 meter long, 52 mm diameter plasma chamber with homogeneous magnetic field. In the case of a single an…