Documents in process

The Gun 5.2 is the latest generation of high-gradient, normal-conducting RF guns that operate at 1.3 GHz. It has been designed for high-duty-cycle operation at European XFEL, with improved stability and reliability.The gun has been tested with RF pulses of up to 610 $\mu$s, and no significant deformation due to pulse heating has been observed. [...]

The first measurement of coherent $Υ$(1S) meson photoproduction off heavy nuclei is performed using ultraperipheral lead-lead collisions collected by the CMS experiment at a nucleon-nucleon center-of-mass energy of 5.02 TeV. The nuclear gluonic structure is probed at a nucleon momentum fraction of order $x$$\sim$ 10$^{-3}$, determined by the kinematics of the process. [...]

First order phase transitions are well motivated and extensively studied sources of gravitational waves (GWs) from the early Universe. The vacuum energy released during such transitions is assumed to be transferred primarily either to the expanding bubble walls, whose collisions source GWs, or to the surrounding plasma, producing sound waves and turbulence, which source GWs. [...]

Truncations of effective field theory expansions are technically necessary but inherently intertwined with the redundancies of general field redefinitions. This can be viewed as a juxtaposition of power-counting and theoretical uncertainties, which seek to estimate neglected higher-dimensional interactions through approaches based on community consensus. [...]

This study investigates the combined effects of salinity and microplastic contamination on the evaporation process and salt crystallization in porous media through complementary column- and pore-scale experiments. Laboratory soil columns were packed with either pure sand or sand mixed with 5% (w/w) poly(vinyl chloride) (PVC) microplastics and subsequently saturated with freshwater or saline (NaCl) solution. [...]

Crown ether–amino acid hybrids represent a promising class of amphiphilic molecules combining ionrecognition with self-assembly capabilities. Despite extensive studies on their binding properties, theinfluence of inorganic salt complexation on their liquid crystalline behaviour remains underexplored.Here we synthesized amphiphilic [18]-crown-6 derivatives of L-dihydroxyphenylalanine and tetrahydroisoquinolineanalogues, systematically investigating the effects of alkyl chain length and salt type onmesophase formation. [...]

The present work focuses on the microstructure evolution of an aluminium 6082 alloy during the homogenization treatment. In-situ high-energy X-ray diffraction (HEXRD) measurements enable the time-resolved study of the evolution of primary phases like β-Mg2Si and silicon and the nucleation of new precipitates, such as α-Al15(Fe,Mn)3Si2 dispersoids and metastable B′-Al4Mg8Si7. [...]

Context. To date, three nuclear transients have been associated with high-energy neutrino events. [...]

Quantum chromodynamics admits a CP violating contribution to the action, the θ term, which is expected to give rise to a nonvanishing electric dipole moment of the neutron. Despite intensive search, no CP violations have been found in the strong interaction. [...]