A5101888879- Particle Accelerators and Free-Electron Lasers
- Particle accelerators and beam dynamics
- Nuclear Physics and Applications
- Particle Detector Development and Performance
- Advanced X-ray Imaging Techniques
- Gyrotron and Vacuum Electronics Research
- Radiation Detection and Scintillator Technologies
- Laser-Plasma Interactions and Diagnostics
- Spectroscopy and Laser Applications
- Atomic and Molecular Physics
- Laser Design and Applications
- Superconducting Materials and Applications
- Consumer Market Behavior and Pricing
- Terahertz technology and applications
- Medical Imaging Techniques and Applications
- Acoustic Wave Resonator Technologies
- Market Dynamics and Volatility
- Calibration and Measurement Techniques
- Superconducting and THz Device Technology
- Photocathodes and Microchannel Plates
- Advanced X-ray and CT Imaging
- Advanced MEMS and NEMS Technologies
- Monetary Policy and Economic Impact
- Advanced Sensor Technologies Research
- Media Influence and Politics
Università degli Studi della Tuscia
2022-2024
Bank of Italy
2024
Sapienza University of Rome
2011-2023
Ospedale Santa Maria
2020
Istituto Nazionale di Fisica Nucleare, Sezione di Roma I
2013-2017
Institute for Chemical and Physical Processes
2013
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati
2006-2007
Istituto Nazionale di Fisica Nucleare
2006-2007
Jet Propulsion Laboratory
2007
Optical Sciences (United States)
1979-1980
Ultra-short electron beams, produced through the velocity bunching compression technique, are used to drive SPARC linear accelerator based source, which relies on emission of coherent transition radiation in terahertz range. This paper reports main features this radiation, as with spectral coverage up 5 THz and pulse duration down 200 fs, an energy per order several micro-joule, beam longitudinal diagnostics.
The linac driven coherent THz radiation source at the SPARC-LAB test facility is able to deliver broadband pulses with femtosecond shaping. In addition, high peak power, narrow spectral bandwidth can be also generated, taking advantage of advanced electron beam manipulation techniques, generate an adjustable train bunches a sub-picosecond length and spacing. paper reports on manipulation, characterization, transport in bending line transporting down station, where different transition...
Numerical simulation of high-power gas lasers requires the integration a variety numerical techniques; simultaneous solutions must be obtained to large set ordinary differential equations, and several nonlinear partial equations. A family codes employing similar methods has been devised demonstrated remarkable success in predicting laser performance over broad range parameters. We describe here appropriate techniques for dealing with kinetic steady-state Boltzmann equation, physical optics....
We discuss a two-color SASE free-electron laser (FEL) amplifier where the time and energy separation of two separated radiation pulses are controlled by manipulation electron beam phase space. Two beamlets with adjustable spacing generated in an RF photo-injector illuminating cathode comb-like pulse followed compression linear accelerator. review technique to generate bunches properties suitable for driving FEL radiation. Experimental measurements at SPARC-LAB facility illustrate flexibility...
Two-color plasma, induced by two lasers of different colors, can radiate ultra-broadband and intense terahertz (THz) pulses, which is desirable in many technological scientific applications. It was found that the polarization emitted THz depends on phase difference between fundamental laser wave its second harmonic. Recent investigation suggests chirp-induced change pulse overlap plays an important role yield from two-color plasma. However, effect chirp remains unexplored. Hereby, we...
Formation and quenching processes of the XeCl (B) state have been investigated. Mixtures Ne/Xe/HCl irradiated by an electron beam 0.6 μsec duration. The results indicate that formation efficiency (C) states are 143%and 31%, respectively. If these closely coupled, ultimate (B→X) laser is 174%. Two-body neon major loss process. At a pumping current 7 A/cm2, mixing B C negligible; however, may be present, at most 20% effect.
This work addresses a well-defined question: the lack of theoretical framework to assist National Statistical Institutes (NSIs) in determining adequacy their data collection for Consumer Price Index – whether it is too sparse, frequent, or just right. We propose designed achieve balance between reducing uncertainty price measurement and minimizing expenses associated with acquisition, processing, storage. cost-benefit analysis particularly relevant emergence big alternative sources,...
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The development of Information and Communications Technology digital economies has contributed to changes in the consumption goods services various areas life, affecting growing expectations users relation price statistics. Therefore, it is important provide information on differences consumer prices across space over time a timely manner. Web-scraped data, which process collecting large amounts data from web, offer potential improve greatly quality efficiency indices. In this paper, we...
An intracavity laser technique has been used to study the absorption of electron-beam pumped Ne/Kr/F <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf> gas mixtures (196 and 300 K) in "blue wing" Kr F emission continuum. The experiments were conducted at 358 nm using <tex xmlns:xlink="http://www.w3.org/1999/xlink">\upsilon' = 0 \rightarrow \upsilon" 1</tex> transition N ( xmlns:xlink="http://www.w3.org/1999/xlink">C B</tex> ) laser....
Observation of ultrawide bandwidth, up to 15% full-width, high-gain operation a self-amplified spontaneous emission free-election laser (SASE FEL) is reported. This type lasing obtained with strongly chirped beam (deltaE/E approximately 1.7%) emitted from the accelerator. Because nonlinear pulse compression during transport, short, high current bunch strong mismatch errors injected into undulator, giving FEL gain. Start-to-end simulations reproduce key features measurements and provide...
Ne/Xe/NF3 mixtures were irradiated by a cold-cathode e-beam, and the fluorescence yields of B C states XeF measured as function neon pressure from 200 to 5300 Torr. At low pressures, yield state corresponds one photon emitted for each ion formed. As is increased decreases, but ratio emission approaches unity. If formed through channel which independent state, then ultimate efficiency laser severely limited. However, analysis data with kinetics model indicates that enhanced results two-body...
We discuss a new method for the production of trains FEL radiation pulses based on emission driven by comb-like electron beam. In addition, we present recent experimental results two color as generated at SPARC_LAB facility: train short (<200 fs) bunches, almost overlapped in time, with energy distribution, has been injected undulator, giving rise to characteristic frequencies multi-peaked time structure. This scheme shows also versatility SPARC photo-injector generate and manipulate such...
In order to characterize and optimize the beam emittance compensation scheme [L. Serafini J. B. Rosenzweig, Phys. Rev. E 55, 7565 (1997)] of Sorgente Pulsata Autoamplificata di Radiazione Coerente project [D. Alesini et al., Nucl. Instrum. Methods Res. A 507, 345 (2003)] high brightness preinjector a system accurately measure rms evolution downstream rf gun has been developed. Since in space charge dominated quadrupole-scan method is not applicable, movable measurement device built based on...
The effects of assumptions about bunch properties on the accuracy measurement method length based radio frequency deflectors (RFDs) in electron linear accelerators (LINACs) are investigated. In particular, when at RFD has a non-negligible energy chirp (i.e. correlation between longitudinal positions and energies particle), is affected by deterministic intrinsic error, which directly related to phase offset. A case study this effect LINAC gamma beam source Extreme Light Infrastructure-Nuclear...
In this manuscript we review the challenges of Compton backscattering sources in advancing photon beam performances 1 – 20 <i>MeV<i/> energy range, underlining design criteria bringing to maximum spectral luminosity and briefly describing main achievements conceiving developing new devices (multi-bunch RF cavities Laser recirculators) for case ELI-NP Gamma Beam System (ELI-NP-GBS).
A Gamma Beam System (GBS), designed by the EuroGammaS collaboration, will be implemented for ELI-NP facility in Magurele, Romania. The deliver an intense gamma beam, obtained collimatio of emerging radiation from inverse Compton interaction. beam energy range span 0.2 up to 19.5 MeV with unprecedented performances terms brilliance, photon flux and bandwidth. For characterisation during commissioning normal operation, a full detection system has been measure spectrum, intensity, space time...
In high-brightness electron linear accelerators (LINACs), the particle bunch length is measured by a radio frequency deflector (RFD). The deflected vertically toward screen and its can be obtained using vertical spot size measurements after proper calibration, e.g., measuring centroid while varying deflecting voltage phase. energy parameters of (the chirp spread) correlation between positions, divergences, energies contribute to dimension at position RFD so far were considered as source...