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A readout system based on the Timepix4 ASIC, is being developed for photon science. The TEMPUS detector can be operated in two distinct modes: a photon counting mode, which allows for conventional full-frame readout at rates up to 40 kfps; and an event-driven time-stamping mode, which allows excellent time resolution in the nanosecond regime in measurements with moderate X-ray flux.In this paper, we introduce the initial prototype, a single-chip system, and present the first results obtained at PETRA III and ESRF..

The tunneling potential formalism makes it easy to construct exact solutions to the vacuumdecay problem in potentials with multiple fields. While some exact solutions for single-fielddecays were known, we present the first nontrivial analytic examples with two and three scalarfields, and show how the method can be generalized to include gravitational corrections. [...]

MALTA2 is a depleted monolithic active pixel sensor (DMAPS) developed in the Tower 180 nm CMOS imaging process. Monolithic CMOS sensors offer advantages over current hybrid imaging sensors both in terms of increased tracking performance due to lower material budget but also in terms of ease of integration and construction costs due to the monolithic design. [...]

Non-structural protein 10 (nsp10) and non-structural protein 16 (nsp16) are part of the RNA synthesis complex, which is crucial for the replication of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Nsp16 exhibits 2’-O-methyltransferase activity during viral messenger RNA capping and is active in a heterodimeric complex with enzymatically inactive nsp10. [...]

Intense x-ray free-electron laser pulses can induce multiple sequences of one-photon ionization and accompanying decay processes in atoms, producing highly charged atomic ions. Considering individual quantum states during these processes provides more precise information about the x-ray multiphoton ionization dynamics than the common configuration-based approach [...]

Plasma turbulence is a ubiquitous dynamical process that transfers energy across many spatial and temporal scalesand affects energetic particle transport. Recent advances in the understanding of compressiblemagnetohydrodynamic (MHD) turbulence demonstrate the important role of damping in shaping energydistributions on small scales, yet its observational evidence is still lacking [...]