C. Marrelli
A5089214643- Particle accelerators and beam dynamics
- Particle Accelerators and Free-Electron Lasers
- Gyrotron and Vacuum Electronics Research
- Microwave Engineering and Waveguides
- Neutrino Physics Research
- Superconducting Materials and Applications
- Astrophysics and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Advanced X-ray Imaging Techniques
- Semiconductor materials and devices
- Photocathodes and Microchannel Plates
- Magnetic properties of thin films
- Plasma Diagnostics and Applications
- Radiation Detection and Scintillator Technologies
- Radio Frequency Integrated Circuit Design
- Electromagnetic Simulation and Numerical Methods
- Dark Matter and Cosmic Phenomena
- Laser-Plasma Interactions and Diagnostics
- Atomic and Molecular Physics
European Spallation Source
2015-2024
Lancaster University
2017
European Organization for Nuclear Research
2011-2014
Sapienza University of Rome
2009-2013
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati
2010-2011
In this Letter we report the first experiments aimed at simultaneous demonstration of emittance compensation process and velocity bunching in a high brightness electron source, SPARC photoinjector INFN-LNF. While maximum compression ratio up to factor 14 has been observed, particular case interest 3, yielding slice current 120 A with less than 2 μm emittance, measured. This technique may be crucial achieving beams photoinjectors aiming optimized performance short wavelength single-pass free...
Abstract A design study, named $${\text {ESS}}\nu {\text {SB}}$$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mrow><mml:mtext>ESS</mml:mtext><mml:mi>ν</mml:mi><mml:mtext>SB</mml:mtext></mml:mrow></mml:math> for European Spallation Source neutrino Super Beam, has been carried out during the years 2018–2022 of how 5 MW proton linear accelerator under construction in Lund, Sweden, can be used to produce world’s most intense long-baseline beam. The high beam intensity will allow...
SPARC (acronym of ``Sorgente Pulsata ed Amplificata di Radiazione Coerente'', i.e. Pulsed and Amplified Source Coherent Radiation) is a single pass free-electron laser designed to obtain high gain amplification at radiation wavelength 500 nm. Self-amplified spontaneous emission has been observed driving the amplifier with high-brightness beam linac. We report measurements energy, spectra, exponential gain. Experimental results are compared simulations from several numerical codes.
The increase in efficiency of RF power generation for future large accelerators is considered a high priority issue. vast majority the existing commercial high-power klystrons operates electronic range between 40% and 55%. Only few available on market are capable operating with 65% or above. In this paper, new method to achieve 90% conversion klystron amplifier presented. essential part bunching technique - bunch core oscillations. Computer simulations confirm that production above can be...
In this paper, we study scalar mediator induced nonstandard interactions (SNSIs) in the context of ESSnuSB experiment. particular, capability to put bounds on SNSI parameters and also impact SNSIs measurement leptonic <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:mi>C</a:mi><a:mi>P</a:mi></a:math> phase <c:math xmlns:c="http://www.w3.org/1998/Math/MathML" display="inline"><c:msub><c:mi>δ</c:mi><c:mrow><c:mi>C</c:mi><c:mi>P</c:mi></c:mrow></c:msub></c:math>....
Peak current represents a key demand for new generation electron beam photoinjectors. Many applications, such as free laser, inverse Compton scattering, terahertz radiation generation, have efficiencies strongly dependent on the bunch length and current. A method of longitudinal compression (called velocity bunching) has been proposed some years ago, based phase space rotation in rf field potential. The control can lead to factor excess 10, depending initial emittance. Code simulations shown...
This paper outlines the results obtained from Magic software for CSM_23 (Core Stabilization Method) klystron. klystron implements use of a second and third harmonic to increase efficiency. From PIC simulation an efficiency 78.1% was achieved.
Use of a second harmonic and third cavity within klystron to increase efficiency has been studied using particle-in-cell (PIC) code, MAGIC 2D. The six device drive frequency 1GHz, predicted 88%, 39 dB gain an output power 833 kW. preliminary simulation results have revealed indications bunching with bunch core oscillations. initial analysis the F-Tube PIC study are presented.
Technological advancements are strongly required to fulfill the demands of new accelerator devices with highest accelerating gradients and operation reliability for future colliders. To this purpose an extensive R&D regarding molybdenum coatings on copper is in progress. In contribution we describe chemical composition, deposition quality resistivity properties different obtained via sputtering. The deposited films thick metallic disorder layers values above below molibdenum dioxide...
Neutrino oscillation experiments provide a unique window in exploring several new physics scenarios beyond the standard three flavour. One such scenario is quantum decoherence neutrino which tends to destroy interference pattern of neutrinos reaching far detector from source. In this work, we study context ESSnuSB experiment. We consider energy-independent parameter and derive analytical expressions for P$_{\mu e}$ \mu}$ probabilities vacuum. have computed capability put bounds on parameters...
Upcoming large scale particle accelerators, such as the Future Circular Collider (FCC), Compact Linear (CLIC) and International (ILC) are expected to require RF drive on order of 100 MW. Therefore, efforts improve efficiency specific source is significant interest accelerator community. Klystrons an attractive choice source, with current state art tubes offering efficiencies up 70%. The High Efficiency Klystron Activity (HEIKA) collaboration seeks upon this by considering novel methods...
A high efficiency klystron making use of second and third harmonic cavity bunching method (Core Stabilization Method) has been developed. This tube would be able to produce up 1.5 MW pulsed RF power at 704.42 MHz, it is compatible with the requirements for klystrons medium beta part linac European Spallation Source.
Six UK institutes are engaged in a collaborative R&D programme with CERN aimed at demonstrating key aspects of technology feasibility for the Compact Linear Collider (CLIC). We give an overview and status of: 1) Drive-beam components: quadrupole magnets beam phase feed-forward prototype. 2) Beam instrumentation: stripline cavity position monitors, electro-optical longitudinal bunch profile monitor, laserwire diffraction transition radiation monitors transverse beam-size determination. 3)...