F. Severino
A5075138904- Particle Accelerators and Free-Electron Lasers
- Particle accelerators and beam dynamics
- Superconducting Materials and Applications
- Particle Detector Development and Performance
- Magnetic confinement fusion research
- Particle physics theoretical and experimental studies
- Gyrotron and Vacuum Electronics Research
- High-Energy Particle Collisions Research
- Photocathodes and Microchannel Plates
- X-ray Spectroscopy and Fluorescence Analysis
- Silicon Carbide Semiconductor Technologies
- Quantum Chromodynamics and Particle Interactions
- Electron and X-Ray Spectroscopy Techniques
- Advanced Data Storage Technologies
- Radiation Effects in Electronics
- Radiation Therapy and Dosimetry
- Electromagnetic Launch and Propulsion Technology
- Advanced X-ray and CT Imaging
- Computational Physics and Python Applications
- Photonic and Optical Devices
- Plasma Diagnostics and Applications
- Engineering Diagnostics and Reliability
- Advanced Surface Polishing Techniques
- Magnetic Bearings and Levitation Dynamics
- Embedded Systems Design Techniques
Brookhaven National Laboratory
2014-2024
Istituto Nazionale di Fisica Nucleare, Sezione di Napoli
2024
RIKEN BNL Research Center
2007-2008
Continuous-wave photoinjectors operating at high accelerating gradients promise to revolutionize many areas of science and applications. They can establish the basis for a new generation monochromatic x-ray free electron lasers, high-brightness hadron beams, or microchip production. In this Letter we report on record-performing superconducting rf gun with ${\mathrm{CsK}}_{2}\mathrm{Sb}$ photocathode. The is generating charge bunches (up $10\text{ }\text{ }\mathrm{nC}/\text{bunch}$) low...
Abstract High brightness, high charge electron beams are critical for a number of advanced accelerator applications. The initial emittance the beam, which is determined by mean transverse energy (MTE) and laser spot size, one most important parameters determining beam quality. bialkali photocathodes illuminated visible have advantages quantum efficiency (QE) low MTE. Furthermore, Superconducting Radio Frequency (SRF) guns can operate in continuous wave (CW) mode at accelerating gradients,...
Cooling of beams gold ions using electron bunches accelerated with radio-frequency systems was recently experimentally demonstrated in the Relativistic Heavy Ion Collider at Brookhaven National Laboratory. Such an approach is new and opens possibility this technique higher energies than possible electrostatic acceleration beams. The challenges include generation suitable for cooling, delivery required quality to cooling sections without degradation beam angular divergence energy spread,...
Operational stochastic cooling of $100\text{ }\text{ }\mathrm{GeV}/\mathrm{nucleon}$ gold beams has been achieved in the BNL Relativistic Heavy-Ion Collider. We discuss physics and technology longitudinal system present results with beams. A simulation algorithm is described shown to accurately model system.
The next high-current Electron-Ion Collider (EIC) is a new accelerator to be built at Brookhaven National Laboratory in collaboration with Thomas Jefferson Accelerator Facility. In the EIC Electron Storage Ring (ESR), there will beam currents of up 2.5 A, which excite massive higher-order-mode (HOM) power 17 single-cell 591 MHz superconducting radio-frequency (SRF) cavities. Damping HOM ESR SRF cavities challenge. A room temperature cylindrical shell shape silicon carbide (SiC) beamline...
A high-current high-brightness electron accelerator for low-energy RHIC cooling (LEReC) was successfully commissioned at Brookhaven National Laboratory. The LEReC includes a dc photoemission gun, laser system, photocathode delivery magnets, beam diagnostics, superconducting rf booster cavity, and set of normal conducting cavities to provide enough flexibility tune the in longitudinal phase space. Cooling with nonmagnetized accelerated beams requires corrections obtain small momentum spread...
High-bunch-charge photoemission electron-sources operating in a continuous wave (CW) mode are required for many advanced applications of particle accelerators, such as electron coolers hadron beams, electron-ion colliders, and free-electron lasers. Superconducting RF (SRF) has several advantages over other electron-gun technologies CW it offers higher acceleration rate potentially can generate bunch charges average beam currents. A 112 MHz SRF photoinjector (gun) was developed at Brookhaven...
Gold ions for the 2007 run [1] of relativistic heavy ion collider (RHIC) at Brookhaven National Laboratory (BNL) are accelerated in Tandem,Booster and AGS prior to injection into RHIC. The setup performance this chain accelerators is reviewed with a focus on improvements quality beam delivered In particular,more uniform stripping foils between Booster AGS,and new bunch merging scheme have provided bunches reduced longitudinal emittance
Superconducting rf (SRF) photoinjectors are one of the most promising devices for generating continuous wave (CW) electron beams with record high brightness. Ultrahigh vacuum SRF guns provides long lifetime quantum efficiency (QE) photocathodes, while technology accelerating gradients exceeding $10\text{ }\text{ }\mathrm{MV}/\mathrm{m}$. It is especially true low frequency where electrons generated at photocathodes crest voltage. Two main physics challenges their compatibility QE and...
There is significant interest in RHIC heavy ion collisions at radics =5-50 GeV/u, motivated by a search for the QCD phase transition critical point. The lowest energies are well below nominal gold injection = 19.6 GeV/u. several challenges that face operations this regime, including longitudinal acceptance, magnet field quality, lattice control, and luminosity monitoring. We report on status of work to address these challenges, results from beam tests low energy with protons gold.