A5029726109- Particle Accelerators and Free-Electron Lasers
- Particle accelerators and beam dynamics
- Gyrotron and Vacuum Electronics Research
- Particle Detector Development and Performance
- Superconducting Materials and Applications
- Radiation Therapy and Dosimetry
- Radiation Detection and Scintillator Technologies
- Advanced X-ray Imaging Techniques
- Advanced Radiotherapy Techniques
- Radiation Effects in Electronics
- Laser-Plasma Interactions and Diagnostics
- Photocathodes and Microchannel Plates
- Particle physics theoretical and experimental studies
- Atomic and Subatomic Physics Research
- Graphite, nuclear technology, radiation studies
- Pulsed Power Technology Applications
- Nuclear Physics and Applications
- Crystallography and Radiation Phenomena
- Integrated Circuits and Semiconductor Failure Analysis
- Plasma Diagnostics and Applications
- Dark Matter and Cosmic Phenomena
- Neutrino Physics Research
- Magnetic confinement fusion research
- Oil and Gas Production Techniques
- Seismic Waves and Analysis
European Organization for Nuclear Research
2014-2024
University of Victoria
2024
National Agency for New Technologies, Energy and Sustainable Economic Development
2018
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati
2011
Departamento de Ciência e Tecnologia
2006
Istituto Nazionale di Fisica Nucleare, Sezione di Milano
1989-2002
Istituto Nazionale di Fisica Nucleare, Laboratori Acceleratori e Superconduttività Applicata
1992
The R2E project at CERN has tested a few commercial SRAMs and custom-designed SRAM, whose data are complementary to various scientific publications. experimental include low- high-energy protons, heavy ions, thermal, intermediate- neutrons, electrons pions.
The Large Hadron electron Collider (LHeC) is designed to move the field of deep inelastic scattering (DIS) energy and intensity frontier particle physics. Exploiting recovery technology, it collides a novel, intense beam with proton or ion from High Luminosity--Large (HL-LHC). accelerator interaction region are for concurrent electron-proton proton-proton operation. This report represents an update Conceptual Design Report (CDR) LHeC, published in 2012. It comprises new results on parton...
A possible design of a multi-TeV e+e- linear collider is presented. The based on the CLIC (Compact Linear Collider) two-beam technology proposed and developed at CERN. Though study has shown that this applicable to with centre-of-mass energies from 500 GeV or less up 5 TeV, present report focuses nominal energy 3 Te V. First, short overview given physics could possibly be done such collider. Then, description main-beam complex covers injection system, 30 GHz main linac, beam delivery system....
Very High Energy Electron (VHEE) beams are a promising alternative to conventional radiotherapy due their highly penetrating nature and applicability as modality for FLASH (ultra-high dose-rate) radiotherapy. The dose distributions VHEE need be optimised; one option is through the use of quadrupole magnets focus beam, reducing healthy tissue allowing targeted delivery at or dose-rates. This paper presents an in depth exploration focusing achievable current CLEAR (CERN Linear Accelerator...
Active plasma lensing is a compact technology for strong focusing of charged particle beams, which has gained considerable interest use in novel accelerator schemes. While providing $\mathrm{kT}/\mathrm{m}$ gradients, active lenses can have aberrations caused by radially nonuniform temperature profile, leading to degradation the beam quality. We present first direct measurement this aberration, consistent with theory, and show that it be fully suppressed changing from light gas species...
On the wake of results obtained so far at SPARC_LAB test-facility Laboratori Nazionali di Frascati (Italy), we are currently investigating possibility to design and build a new multi-disciplinary user-facility, equipped with soft X-ray Free Electron Laser (FEL) driven by ∼1 GeV high brightness linac based on plasma accelerator modules. This study is performed in synergy EuPRAXIA study. In this paper report about recent progresses going facility.
Abstract Very high energy electron (VHEE) beams have been proposed as an alternative radiotherapy modality to megavoltage photons; they penetrate deeply without significant scattering in inhomogeneous tissue because of their relativistic inertia. However, the depth dose distribution a single, collimated VHEE beam is quasi-uniform, which can lead healthy being overexposed. This be largely overcome by focusing small spot. Here, we present experiments demonstrate means concentrating into...
Abstract This paper presents the first plasmid DNA irradiations carried out with Very High Energy Electrons (VHEE) over 100–200 MeV at CLEAR user facility CERN to determine Relative Biological Effectiveness (RBE) of VHEE. damage yields were measured in dry and aqueous environments that ~ 99% total breaks caused by indirect effects, consistent other published measurements for protons photons. Double-Strand Break (DSB) yield was used as biological endpoint RBE calculation, values found be...
Very high energy electron (VHEE) beams with energies greater than 100 MeV may be promising candidates for FLASH radiotherapy due to their favourable dose distributions and accessibility of ultrahigh dose-rates (UHDR). Combining VHEE the normal tissue-sparing effect UHDR could improve patient outcomes. The standard dosimeters used conventional radiotherapy, including ionization chambers film, have limited application deficits in rate independence temporal resolution. Plastic scintillator...
Spatially-fractionated radiotherapy (SFRT) delivered with a very-high-energy electron (VHEE) beam and mini-GRID collimator was investigated to achieve synergistic normal tissue-sparing through spatial fractionation the FLASH effect.
The Compact Linear Collider (CLIC) is a TeV-scale high-luminosity linear $e^+e^-$ collider under development by international collaborations hosted CERN. This document provides an overview of the design, technology, and implementation aspects CLIC accelerator. For optimal exploitation its physics potential, foreseen to be built operated in stages, at centre-of-mass energies 380 GeV, 1.5 TeV 3 TeV, for site length ranging between 11 km 50 km. uses Two-Beam acceleration scheme, which...
Abstract Objective . Very high energy electrons (VHEE) in the range of 50–250 MeV are interest for treating deep-seated tumours with FLASH radiotherapy (RT). This approach offers favourable dose distributions and ability to deliver ultra-high rates (UHDR) efficiently. To make VHEE-based treatment clinically viable, a novel beam monitoring technology is explored as an alternative transmission ionisation monitor chambers, which have non-linear responses at UHDR. study introduces fibre optic...
Abstract Ultra-high dose rate (UHDR) irradiation has been shown to have a sparing effect on healthy tissue, an known as ‘FLASH’. This studied across several radiation modalities, including photons, protons and clinical energy electrons, however, very little data is available for the of FLASH with Very High Energy Electrons (VHEE). pBR322 plasmid DNA was used biological model measure damage in response Electron (VHEE) at conventional (0.08 Gy/s), intermediate (96 Gy/s) ultra-high rates (UHDR,...
The conversion of the CALIFES beamline CTF3 into “CERN Linear Electron Accelerator for Research” (CLEAR) facility was approved in December 2016. primary focus CLEAR is general accelerator R&D and component studies existing possible future applications. This includes high gradient acceleration methods, e.g. CLIC plasma technology, prototyping validation components, HL-LHC upgrade. also provides irradiation test capabilities characterisation electronic components medical A description with...
The aim of this work is the dosimetric characterization a plane parallel ionization chamber under defined beam setups at CERN Linear Electron Accelerator for Research (CLEAR). A laser driven electron with energy 200 MeV two different field sizes approximately 3.5 mm FWHM and 7 were used pulse structures. Thereby dose-per-pulse range varied between 0.2 12 Gy per pulse. This represents conventional dose rate conditions up to ultra-high (UHDR) conditions. experiment was based on water phantom...
The High Luminosity Large Hadron Collider (HL–LHC) will require unprecedented orbit stability at the low-beta experiments, ATLAS and CMS. Because effect of seismic noise might become a relevant source luminosity loss, several studies have been conducted to characterise actual ground motion in LHC tunnel. In preparation for official groundbreaking civil engineering work high upgrade, that started on 15 June 2018 parallel beam operation, sensors were installed permanently monitor close these...
We present the observation and detailed investigation of coherent Cherenkov diffraction radiation (CChDR) in terms spectral-angular characteristics. Electromagnetic simulations have been performed to optimize design a prismatic dielectric radiator performance detection system with aim providing longitudinal beam diagnostics. Successful experimental validations organized on CLEAR CLARA facilities based at CERN Daresbury laboratory respectively. With ps sub-ps long electron bunches, emitted...
Measurements of the beam emittance during bunch compression in CLIC Test Facility (CTF-II) are described. The measurements were made with different charges and energy correlations versus compressor settings which varied from no through point full to overcompression. Significant increases observed maximum occurring near (maximal) compression. Finally, evaluation possible dilution mechanisms indicates that coherent synchrotron radiation was most likely cause.
We present an analytic expression of the harmonic bunching produced by dispersive section a free-electron laser (FEL) optical klystron operating in high-gain exponential regime. This model allows evaluation constraints and limits, possible optimizations advantages such device with respect to conventional FEL configuration, i.e., shortening overall length reduction induced energy spread, provided that initial spread is smaller than one required for normal operator. The analytical expressions...
We present experimental evidence of electron-induced upsets in a reference European Space Agency (ESA) single event upset (SEU) monitor, induced by 200-MeV electron beam at the Very energetic Electronic facility for Planetary Exploration harsh Radiation environments CERN. Comparison cross sections and simulated is shown differences are analyzed. Possible secondary contributions to rate neutrons, flash effects, cumulative dose effects discussed, showing that electronuclear reactions expected...
Electron bunches of high charge (up to 10 nC) are compressed in length the Compact Linear Collider Test Facility magnetic chicane less than 0.4 mm rms. The short radiate coherently field, and horizontal longitudinal phase space density distributions affected. This paper reports results beam emittance momentum measurements. Horizontal vertical emittances spectra were measured for different bunch compression factors charges. In particular, nC bunches, mean decreased by about 5% while rms...
Discharge capillary-based active plasma lenses are a promising new technology for strongly focusing charged particle beams, especially when combined with novel high gradient acceleration methods. Still, many questions remain concerning such lenses, including their transverse field uniformity, limitations due to wakefields and whether they can be in multi-lens lattices way cancel chromaticity. These will addressed lens experiment at the CLEAR User Facility CERN. All subsystems have been...
The proposed Compact Linear Collider (CLIC) is a multi-TeV electron-positron collider for particle physics based on an innovative two-beam acceleration concept. A high-intensity drive beam powers the main of high-frequency (30 GHz) linac with gradient 150 MV/m, by means transfer structure sections. aim CLIC Test Facility (CTF3) to make exhaustive tests parameters and prove technical feasibility. One points particular interest demonstration bunch train compression combination in Delay Loop...