A5021606944- Particle accelerators and beam dynamics
- Superconducting Materials and Applications
- Particle Accelerators and Free-Electron Lasers
- Particle Detector Development and Performance
- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Laser-Plasma Interactions and Diagnostics
- Nuclear Physics and Applications
- Space Science and Extraterrestrial Life
- Advanced X-ray and CT Imaging
- Diamond and Carbon-based Materials Research
- Planetary Science and Exploration
- Magnetic confinement fusion research
- Graphite, nuclear technology, radiation studies
- Fusion materials and technologies
- Crystallography and Radiation Phenomena
- Ionosphere and magnetosphere dynamics
- European and International Contract Law
- Medical Imaging Techniques and Applications
- Iterative Learning Control Systems
- Advanced Surface Polishing Techniques
- Paranormal Experiences and Beliefs
- Ion-surface interactions and analysis
- Electromagnetic Simulation and Numerical Methods
- Heat Transfer Mechanisms
European Organization for Nuclear Research
2018-2023
Uppsala University
2018-2022
Rutherford Appleton Laboratory
2018
An important upgrade has been deployed for the collimation system of Large Hadron Collider (LHC) lead-ion beams that are already planned to reach their high-luminosity target intensity in ongoing LHC Run 3 (2022–2026). While certain effects like e-cloud, beam-beam, impedance, injection, and dump protection relaxed with ion beams, halo becomes an increasing challenge, as conventional multistage is about two orders magnitude less efficient than proton beams. Ion fragments scattered out...
This paper reports the results from single-pulse experiments of a $440\text{ }\text{ }\mathrm{GeV}/c$ proton beam interacting with granular tungsten samples in both vacuum and helium environments. Remote high-speed photography laser Doppler vibrometry were used to observe effect on sample grains. The majority derived trough containing $\ensuremath{\sim}45\text{ }\ensuremath{\mu}\mathrm{m}$ diameter spheres (not compacted) reset between maintain same initial conditions. Experiments also...
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...
Micrometer-sized dust particles present in the Large Hadron Collider (LHC) beam pipe are believed to have caused many thousands of sporadic loss events around LHC. These so-called unidentified falling objects (UFOs) been under continuous study since start high intensity operation LHC due their impact on availability: 139 dumps and 12 magnet quenches during Run II (2015--2018) alone. To mitigate UFOs future accelerators such as High Luminosity Future Circular Collider, it is fundamental...
The interaction of dust particles with the LHC proton beams accounts for a major fraction irregular beam loss events observed in physics operation. cease after few revolutions because expulsion from once they become ionized transverse tails. Despite transient nature these events, resulting losses can trigger aborts or provoke quenches superconducting magnets. In this paper, we study characteristics beam-dust particle interactions cryogenic arcs by reconstructing key observables like nuclear...
Micrometer sized particles entering the LHC beam (the so called Unidentified Falling Objects or UFOs) are a known cause of localized losses since beginning high intensity operation, however origin these is not fully known. Their effect limits availability by causing premature dumps due to excessive and occasionally even magnet quenches. This could become an important limitation for future accelerators such as High Luminosity upgrade (HL-LHC) Future Circular Collider (FCC). The dynamics UFOs...
The concept of crystal collimation exploits the peculiar properties crystalline materials to deflect high-energy beam particles at angles orders magnitude larger than what can be achieved with scattering by conventional used as primary collimators. This innovative technique is planned improve efficiency heavy-ion beams Large Hadron Collider (LHC) and its High-Luminosity upgrade (HL-LHC). unprecedented proton-equivalent energy range up 7 TeV makes this particularly challenging due small...
Dust grains interacting with the beam of particle accelerators are believed to be cause several detrimental effects such as losses, emittance growth, pressure bursts, and even quenches superconducting magnets. Experimental observations suggest that these positively charged in electron storage rings negatively Large Hadron Collider (LHC). In this paper, charging mechanisms for dust LHC discussed a possible explanation observed polarity is presented. Electron collection, secondary emission,...
An energy of 362 MJ is stored in each the two LHC proton beams for nominal beam parameters. This will be further increased to about 700 future high luminosity (HL-LHC) and uncontrolled losses represent a significant hazard integrity safe operation machine. In this paper, number failure mechanisms that can lead fast increase are analyzed. Most critical failures magnet protection system, namely quench heaters novel system called coupling-loss induced (CLIQ). important outcome has evaluated its...
Abstract Crab cavities (CCs) constitute a key component of the High Luminosity LHC (HL-LHC) project. In case failure, they can induce significant transverse beam offsets within tens microseconds, necessitating fast removal circulating to avoid damage accelerator components due losses from displaced halo. preparation for final design be employed in LHC, series tests were conducted on prototype crab installed Super Proton Synchrotron (SPS) at CERN. This paper summarizes machine protection...