A5074432443- Particle accelerators and beam dynamics
- Particle Accelerators and Free-Electron Lasers
- Superconducting Materials and Applications
- Electron and X-Ray Spectroscopy Techniques
- Advanced X-ray Imaging Techniques
- X-ray Spectroscopy and Fluorescence Analysis
- Radiation Detection and Scintillator Technologies
- Particle Detector Development and Performance
- Advanced Optical Sensing Technologies
- Advanced Semiconductor Detectors and Materials
- Advancements in Photolithography Techniques
- Medical Imaging Techniques and Applications
- Advanced X-ray and CT Imaging
- Mechanical and Optical Resonators
- Photonic and Optical Devices
- Electronic and Structural Properties of Oxides
- Photochemistry and Electron Transfer Studies
- Plasma Diagnostics and Applications
- Photocathodes and Microchannel Plates
- CCD and CMOS Imaging Sensors
- Advanced Electron Microscopy Techniques and Applications
- Spacecraft and Cryogenic Technologies
- Advanced Chemical Physics Studies
- Neural Networks and Reservoir Computing
- High voltage insulation and dielectric phenomena
Elettra-Sincrotrone Trieste S.C.p.A.
2013-2024
University of Trieste
2022-2024
Politecnico di Milano
2021-2022
AREA Science Park
2005-2007
We have determined the effective attenuation length of photoelectrons over range kinetic energies from 4 to 6 keV in Co, Cu, Ge, and ${\mathrm{Gd}}_{2}{\mathrm{O}}_{3}$. The intensity substrate (Si) overlayer core level peaks was measured as a function thickness wedge-shaped overlayers. Experimental values vary between 45--50 \AA{} at 60--65 Ge. Smaller (30 50 \AA{}, respectively) are found Our results confirm that, for different classes materials, high energy photoemission spectroscopy has...
The instrument VOLPE (volume photoemission from solids) is an experimental setup dedicated to high energy (PE) experiments. equipped with electrostatic hemispherical spectrometer especially designed analyze electrons (up 10 keV) resolving power. In order attain resolution of a few tens millielectron volts, we and constructed input lens system, stability power supplies, low dark-count detector readout electronics. system has been tested now operational on the ID16 beamline at European...
We present high-resolution valence band and core level spectra of silver for photoelectron kinetic energies up to 8 keV. At these we estimate a surface contribution less than 3%. Taking advantage the favourable sp/d relative cross-sections, comparison with calculated density states is presented. observe an increasing photoemission intensity when approaching Fermi level, which assign free-electron-like character in 5p-band, whereas principal s-like located at bottom d-band. The difference...
We present an high-resolution 3D (X,Y,t) imager for time-resolved experiments based on time-to-space conversion. The system uses Cross Delay-Line detectors (CDL) particle identification and a fully-configurable digital processor Field Programmable Gate Arrays (FPGAs) the image reconstruction. instrument reaches spatial resolution of 45 μm FWHM (i.e.,18 r.m.s.) temporal precision 15 ps r.m.s.. detection rate achieved is 10 Mcps, with dead-time below 7 ns, leading to global throughput up 6...
Elettra 2.0 will be a fourth generation storage ring light source replacing the existing synchrotron. This article illustrates design strategies, physical investigations and technical choices to meet multiple sometimes conflicting requirements. These include make fully transversely coherent up 0.5 keV-photon energy, diversify type of experiments through very broad range photon energies, from infrared hard x-rays, maximize number beamlines in excess 2-times machine periodicity, able produce...
Abstract The powerful resource of parallelizing simple devices for realizing and enhancing complex operations comes with the drawback multiple connections addressing controlling individual elements. Here we report on a technological platform where several mechanical resonators can be individually probed electrically actuated by using dispersive multiplexing within single electrical channel. We demonstrate room temperature control device vibrational motion spatially-resolved readouts. As...
The complexity of a particle accelerator implies the remote control very large numbers devices, with many different typologies, either distributed along or concentrated in locations, often far away from each other. Local and global systems handle devices through dedicated communication channels interfaces. Each controlled device is practically "smart node" performing specific task. In addition, often, those tasks are managed real-time mode. performances required to interface has an influence...
In search of the cause behind similarities often seen in fragmentation PANHs, vacuum ultraviolet (VUV) photodissociation two pairs isomers quinoline–isoquinoline and 2-naphthylamine-3-methyl-quinoline are studied using velocity map imaging technique. The internal energy dependence all primary channels is obtained for four target molecules. decay dynamics molecules by comparing their various experimental signatures. dominant channel first pair found to be hydrogen cyanide (HCN) neutral loss,...
A detailed comparison of the surface sensitivity x-ray photoemission spectroscopy for hard and soft x rays is presented discussed. Electron scattering parameters their energy dependence are given Si two spectra analyzed: a $\mathrm{Mg}\phantom{\rule{0.2em}{0ex}}K\ensuremath{\alpha}$ $(h\ensuremath{\nu}=1253.6\phantom{\rule{0.3em}{0ex}}\mathrm{eV})$ excited spectrum $\mathrm{Si}\phantom{\rule{0.2em}{0ex}}2p$ $2s$ lines $(h\ensuremath{\nu}=5925\phantom{\rule{0.3em}{0ex}}\mathrm{eV})$...
We report on a suite of modeling approaches for the optimization Avalanche Photodiodes X-rays detection. Gain and excess noise are computed efficiently using non-local/history dependent model that has been validated against full-band Monte Carlo simulations. The (stochastic) response detector to photon pulses is an improved Random-Path-Length algorithm. As case studies, we consider diodes consisting AlGaAs/GaAs multi-layers with separated absorption multiplication regions. A superlattice...
Abstract A state of the art commercial detector, a PCO Edge 4.2 bi based on back illuminated sCMOS sensor developed for applications in visible light/ultra violet regime has been adapted ultra-high vacuum operations and characterized using soft X-ray energy range from 30 eV to 1000 eV. The imager features 2048 × pixel with size 6.5 μm allows full frame acquisitions at 48 Hz dynamic 88 dB noise level 1.9 e − . Spatial resolution quantum efficiency have elucidated aforementioned beam line...
Innovative, low-loss, and compact optical systems are essential to meet the experimental requirements of emerging novel radiation sources. The microchannel plate (MCP), a metamaterial-based device, shows promising potential for shaping, condensing, focusing soft x-ray at synchrotron (SR) facilities. This study highlights impact MCP devices on SR beam condensing capability their sensitivity degree coherence by investigating profile transmitted beams through single double devices. Transmitted...
The Elettra Storage Ring is operating for external Users since 1994. High stability, low ripple, DC power supplies are needed energizing the magnets used to keep electron beam on defined path with required characteristics. remote control of still based VME standard and serial MIL 1553 network. A study upgrading local system, adopting modern technologies software tools presented in article, along inherent difficulties due large number units impact operation accelerator.
Among the wide range of applications that power supplies are able to cover, Particle Accelerator based Light Sources one most demanding. In specific case Elettra Storage Ring, a Synchrotron Radiation Facility operating since 1993, magnet with other critical devices determining quality photon beams and overall accelerator uptime. Because that, they have provide stable, reliable, precise remotely controlled operation. From strictly functional perspective, each supply can be seen as part,...
Time resolved experiments are among the most powerful tools in physic for exploring photoelectron spectroscopy phenomena over time scales from milliseconds to picoseconds Moreover, acquisition systems with versatility and real-time computing needed. Cross Delay-Lines detectors (CDL) extremely suitable these applications, since arrival measurement is exploited perform position detection, allowing provide both information together. Typical architectures based on Aplication Specific Integrated...
Time-resolved spectroscopic and electron–ion coincidence techniques are essential to study dynamic processes in materials or chemical compounds. For this type of analysis, it is necessary have detectors capable providing, addition image-related information, the time arrival for each individual detected particle (“x, y, time”). The electronics handling such sensors must meet requirements achievable only with time-to-digital converters (TDC) a resolution on order tens picoseconds use...
Atomic-scale imaging using scanning probe microscopy is a pivotal method for investigating the morphology and physico-chemical properties of nanostructured surfaces. Time resolution represents significant limitation this technique, as typical image acquisition times are on order several seconds or even few minutes, while dynamic processes—such surface restructuring particle sintering, to be observed upon external stimuli such changes in gas atmosphere electrochemical potential—often occur...