A5055917790- Particle Accelerators and Free-Electron Lasers
- Particle accelerators and beam dynamics
- Particle Detector Development and Performance
- Superconducting Materials and Applications
- Gyrotron and Vacuum Electronics Research
- Laser-Plasma Interactions and Diagnostics
- Atomic and Molecular Physics
- Plasma Diagnostics and Applications
- Particle physics theoretical and experimental studies
- Medical Imaging Techniques and Applications
- Radiation Therapy and Dosimetry
- Nuclear Physics and Applications
- Pulsed Power Technology Applications
- Advanced X-ray Imaging Techniques
- Dark Matter and Cosmic Phenomena
- Electron and X-Ray Spectroscopy Techniques
- Atomic and Subatomic Physics Research
- Seismic Waves and Analysis
- Urban Planning and Valuation
- Cold Atom Physics and Bose-Einstein Condensates
- Advanced Frequency and Time Standards
- Environmental Monitoring and Data Management
- Sepsis Diagnosis and Treatment
- Electric Vehicles and Infrastructure
- Congenital Heart Disease Studies
European Organization for Nuclear Research
2014-2024
LINKS Foundation
2022
Cockcroft Institute
2020
University of Liverpool
2020
Case Western Reserve University
2016
Cornell University
2016
University of Oxford
2014
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...
PAX (antiProtonic Atom X-ray spectroscopy) is a new experiment with the aim to test strong-field quantum electrodynamics (QED) effects by performing high-precision x-ray spectroscopy of antiprotonic atoms. By utilizing advanced microcalorimeter detection techniques and low-energy antiproton beam provided ELENA ring at CERN, gaseous targets will be used for creation atoms, measurement transitions between circular Rydberg states conducted up two orders magnitude improved accuracy over previous...
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 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...
This contribution describes the experimental program already undergoing and to be completed on High Luminosity LHC (HL-LHC) IT String, an important intermediate milestone of HL-LHC project at CERN. First, it magnet circuits String. Afterwards, different systems installed perform are detailed. The proposed tests defined for validation cryogenic system, full remote alignment powering protection schemes all magnets working in unison. strategy will allow a verification integrated system before...
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 CERN Linear Electron Accelerator for Research (CLEAR) has now finished its second year of operation, providing a testbed new accelerator technologies and versatile radiation source. Hosting varied experimental program, this beamline provides flexible test facility users both internal external to CERN, as well being an excellent physics training ground. energy can be between 60 220 MeV, bunch length 1 4 ps, charge in the range 10 pC 2 nC, number bunches 200, at repetition rate 0.8 Hz....
We report on the radiation studies performed at CLEAR facility of CERN in sub-THz range, exploiting picosecond ultrarelativistic electron bunches for production coherent radiation. The radiation, produced by different mechanisms (in particular transition radiation), has been fully characterized using techniques and detectors. main aim that to setup a new beam-based source mm-waves external users, individuating performances limitations. Moreover used longitudinal diagnostics, providing...
Type-II superconductors, like the ${\mathrm{Nb}}_{3}\mathrm{Sn}$ used in new HL--LHC quadrupole triplet and 11 T dipoles or FCC dipoles, are known to show an unstable behavior during magnetic-field ramps. This paper presents analysis of possible effects on beam dynamics this magnets, with a focus emittance blow-up.
The new CERN Linear Electron Accelerator for Research (CLEAR) facility at started its operation in fall 2017. CLEAR results from the conversion of CALIFES beam line former CLIC Test Facility (CTF3) into a testbed general accelerator R&D and component studies existing possible future applications. can provide stable reliable electron 60 to 220 MeV single or multi bunch configuration 1.5 GHz. experimental program includes high gradient acceleration methods, e.g. X-band plasma technology,...
From mid-2012, the Two Beam Test Stand (TBTS) in CTF3 Experimental Facility is hosting 2 high gradient accelerating structures powered by a single power extraction and transfer structure scheme very close to CLIC basic cell. We report here about results obtained with this configuration as: energy gain spread relation RF phases power, octupolar transverse beam effects compared modelling predictions, breakdown rate locations within structures. These are first be fitted Wake Field Monitors...
This retrospective cohort study included one hundred fifty-seven medium and large-size dogs with the aim of evaluating effect signalment echocardiographic features on complications, outcomes left ventricular modifications before after patent ductus arteriosus (PDA) closure. The patients were divided in two groups based heart remodeling closure: Group A that had a reduction end-systolic volume index (ESVI) closure compared to ESVI measured before; B without Body weight, minimal ductal...
Electric vehicles are seen as a sustainable alternative in the current fight against increasing pollution worldwide. However, they still seeing limited spread among drivers and one of challenges is to deepen knowledge about users' perceptions this innovative means transport. The paper presents work done framework by creating two Discrete Choice Experiments. first investigates aspects related car ownership characteristics performances, whereas second focuses on features charging...
Introduction Arterial blood gas analysis is the gold standard for assessment of oxygenation, ventilation, and metabolic status in dogs; however, its execution difficult painful. Therefore, venous used replacement status, but it not clear whether can be to assess respiratory function, too. This study aimed at: 1) comparing jugular saphenous pH partial pressure carbon dioxide (pCO 2 ) with correspondent arterial pCO (paCO healthy dogs during general anesthesia; 2) clarifying arterial-venous...