A5032956670- Particle accelerators and beam dynamics
- Particle Accelerators and Free-Electron Lasers
- Superconducting Materials and Applications
- Radiation Therapy and Dosimetry
- Gyrotron and Vacuum Electronics Research
- Metal Forming Simulation Techniques
- High-Velocity Impact and Material Behavior
- Energy Harvesting in Wireless Networks
- Metallurgy and Material Forming
- Laser-Plasma Interactions and Diagnostics
- Radio Frequency Integrated Circuit Design
- Particle Detector Development and Performance
- Acoustic Wave Resonator Technologies
- Advanced Surface Polishing Techniques
- High-pressure geophysics and materials
- Nuclear Physics and Applications
- Plasma Diagnostics and Applications
- Wireless Power Transfer Systems
- Geotechnical and Geomechanical Engineering
- Advanced Materials and Mechanics
- Fusion materials and technologies
- Electronic Packaging and Soldering Technologies
- Tunneling and Rock Mechanics
- Electromagnetic Simulation and Numerical Methods
- Space Science and Extraterrestrial Life
European Organization for Nuclear Research
2013-2024
University of Naples Federico II
2021
CERN’s 160 MeV H− linear accelerator (Linac4) is a key constituent of the injector chain upgrade Large Hadron Collider that being installed and commissioned. A cesiated surface ion source prototype tested has delivered beam intensity 45 mA within an emittance 0.3 π ⋅ mm mrad. The optimum ratio co-extracted electron- to ion-current below 1 best production efficiency, defined as current 2 MHz RF-power transmitted plasma, reached 1.1 mA/kW. first tests new optics, electron-dump, front end...
Two volume sources equipped with DESY and CERN plasma generators a low voltage electron dump were operated at 45 kV in the Linac4 tunnel on dedicated test stand. These delivered approximately 20 mA ensured commissioning of Radio Frequency Quadrupole accelerator first section Drift Tube Linac. CERN's prototype cesiated surface source this was continuously from November 2013 to April 2014 ion stand is being commissioned tunnel. Before cesiation, conditioned mode provided up 30 H− beam. Short...
TERA Foundation has proposed and designed hadrontherapy facilities based on novel linacs, i.e. high gradient linacs which accelerate either protons or light ions. The overall length of the linac, therefore its cost, is almost inversely proportional to average accelerating gradient. With scope studying limiting factors for operation optimize linac design, TERA, in collaboration with CLIC Structure Development Group, conducted a series experiments. main goals were study behavior evaluate...
Abstract The FCC-ee machines present a huge challenge for the RF systems, which need to be adapted very diverse beam conditions going from moderate energy and high current Z machine low ttbar. This inverse scaling results naturally fixed budget synchrotron radiation, SRF cavities compensate. A global solution was elaborated FCC Conceptual Design Report (Abada in Eur Phys J Spec Top 228):261–623, 2019), is referred here as baseline. Recently, further studies have led new optimized baseline,...
Charged particle therapy, or so-called hadrontherapy, is developing very rapidly. There large pressure on the scientific community to deliver dedicated accelerators, providing best possible treatment modalities at lowest cost. In this context, Italian research Foundation TERA fast-cycling dubbed `cyclinacs'. These are a combination of cyclotron (accelerating ions fixed initial energy) followed by high gradient linac boosting energy up maximum needed for medical therapy. The powered many...
Linac4 cesiated surface H− sources are routinely operated for the commissioning of CERN's and on an ion source test stand. Stable current 40-50 mA achieved but transmission through LEBT 80% was below expectations triggered additional beam simulation characterization. The profile is not Gaussian emittance measurements larger than simulation. status ongoing development work described; 36 20 D− beams were produced with a 5.5 mm aperture source. emittances measured at stand presented. During...
Beam Intercepting Devices (BID) are designed to operate in a harsh radioactive environment and highly loaded from thermo-structural point of view. Moreover, modern particle accelerators, storing unprecedented energy, may be exposed severe accidental events triggered by direct beam impacts. In this context, impulse has been given the development novel materials for advanced thermal management with high shock resistance like metal-diamond metal-graphite composites on top refractory metals such...
CERN is constructing a 750 MHz Radio Frequency Quadrupole (RFQ) which can accelerate proton beam to 5 MeV in length of 2 m. The dynamics strategic parameters have been chosen make this RFQ good candidate for the injector medical facility operating at frequency 3 GHz . Minimising losses above 1 MeV, containing RF power and opening road industrialisation guidelines an unconventional design. In paper, optimisation efforts, structure design expected qualities will be detailed. status...
The HL-LHC project aims at increasing the LHC luminosity by a factor 10 beyond design value. installation of set RF Crab Cavities to increase bunch crossing angle is one key upgrades program. Two concepts, Double Quarter Wave (DQW) and Dipole (RFD) have been proposed are being produced in parallel for test SPS beam before next long shutdown CERN accelerator’s complex. In retained concept, two cavities hosted single cryomodule, providing thermal insulation interfacing with coupling, tuning,...
Many future particle colliders require beam crabbing to recover geometric luminosity loss from the nonzero crossing angle at interaction point (IP). A first demonstration experiment of with hadron beams was successfully carried out high energy protons. This breakthrough result is fundamental achieve physics goals LHC (HL-LHC) and circular collider (FCC). The expected peak gain (related collision rate) 65% for HL-LHC even greater FCC. Novel experiments proton in CERN's Super Proton...
RF Crab Cavities are an essential part of the HL-LHC upgrade. Two concepts such systems being developed: Double Quarter Wave (DQW) and Dipole (RFD). A cryomodule with two DQW cavities is in advanced fabrication stage for tests protons SPS. The must be operated at 2 K, without excessive heat loads, a low magnetic environment compliance CERN safety guidelines on pressure vacuum systems. large set components, as thermal shield, layers lines, helium tank tuner required successful safe operation...
Innovative collimators are being investigated to handle the high energy particle beams foreseen in future upgrades of CERN Large Hadron Collider (LHC). This calls for development novel advanced materials, as no existing metal- or carbon-based material possesses combination physical, thermal, electrical and mechanical properties, imposed by extreme collimator's working conditions. An ambitious research program has been undertaken at collaborating partners investigate, process characterize...