52 documents found, page 1 of 6

Experimental observation of the motion of ions in a resonantly driven plasma wa...

We show experimentally that an effect of motion of ions, observed in a plasma-based accelerator, depends inversely on the plasma ion mass. The effect appears within a single wakefield event and manifests itself as a bunch tail, occurring only when sufficient motion of ions suppresses wakefields. Wakefields are driven resonantly by multiple bunches, and simulation results indicate that the ponderomotive force ca...

Thermal Performance of Multifunctional Facade Solution Containing Phase Change ...

This work focuses on the development and analysis of a new multifunctional facade panel incorporating PCM in foam layers. The thermal performance was analysed recurring to a hotbox heat flux meter method to determine the thermal transmittance (U-value) and the main findings are presented. The experimental setup was based on the steady-state approach, using climatic chambers, assuring a stable thermal environmen...

Outline of the incorporation of phase change materials in radiant systems

This article presents an outline about the incorporation of phase change materials (PCM) in radiant systems, their incorporation techniques, challenges, advantages, and disadvantages. The PCM incorporation into building solutions has been studied over the last 40 years to improve the energy efficiency and to solve the fast-growing problem of energy consumption in housing. The use and incorporation of PCM in bui...

Numerical modelling of radiant systems and phase change materials in building a...

As a result of increasing environmental and economic concerns, the demand for more efficient energetic systems has augmented, leading to a greater focus on investigating new solutions. The latest developments in the integration of radiant systems in buildings have shown promising results, being a feasible and more efficient technology. In this regard, an analysis of the current state of the radiant system's dev...

CS48 the interwining of reading and being in preschool education-project the gr...

Simulation and experimental study of proton bunch self-modulation in plasma wit...

We present numerical simulations and experimental results of the self-modulation of a long proton bunch in a plasma with linear density gradients along the beam path. Simulation results agree with the experimental results reported [F. Braunmller, T. Nechaeva et al. (AWAKE Collaboration), Phys. Rev. Lett. 125, 264801 (2020)PRLTAO0031-900710.1103/PhysRevLett.125.264801]: with negative gradients, the charge of the...

Transition between instability and seeded self-modulation of a relativistic par...

We use a relativistic ionization front to provide various initial transverse wakefield amplitudes for the self-modulation of a long proton bunch in plasma. We show experimentally that, with sufficient initial amplitude [≥(4.1±0.4) MV/m], the phase of the modulation along the bunch is reproducible from event to event, with 3%-7% (of 2?) rms variations all along the bunch. The phase is not reproducible for lower ...

Analysis of proton bunch parameters in the AWAKE experiment

A precise characterization of the incoming proton bunch parameters is required to accurately simulate the self-modulation process in the Advanced Wakefield Experiment (AWAKE). This paper presents an analysis of the parameters of the incoming proton bunches used in the later stages of the AWAKE Run 1 data-taking period. The transverse structure of the bunch is observed at multiple positions along the beamline us...

A aromaterapia como intervenção de enfermagem na pessoa com ansiedade: uma revi...

Competência motora e sócio-emocional e estratégias de exploração do espaço de r...

Este, artigo expõe um estudo-piloto, sustentado pela abordagem ecológica gibsoniana, que defende que as características físicas dos espaços exteriores oferecem diferentes affordances, mas que a exploração das mesmas depende não só das propriedades que o espaço apresenta, mas também das características da criança. Segundo estudos recentes, o recreio pré-escolar promove diferentes comportamentos lúdicos impactant...