A5022567612- Particle Accelerators and Free-Electron Lasers
- Particle accelerators and beam dynamics
- Superconducting Materials and Applications
- Particle Detector Development and Performance
- Advanced X-ray Imaging Techniques
- Magnetic confinement fusion research
- Electron and X-Ray Spectroscopy Techniques
- Distributed and Parallel Computing Systems
- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- X-ray Spectroscopy and Fluorescence Analysis
- Laser-Plasma Interactions and Diagnostics
- Photocathodes and Microchannel Plates
- Radiation Therapy and Dosimetry
- Advanced Data Storage Technologies
- Advancements in Photolithography Techniques
- Gyrotron and Vacuum Electronics Research
- Integrated Circuits and Semiconductor Failure Analysis
- Dark Matter and Cosmic Phenomena
- Optical Systems and Laser Technology
- Non-Destructive Testing Techniques
- Advancements in Semiconductor Devices and Circuit Design
- Advanced Electron Microscopy Techniques and Applications
- Semiconductor materials and devices
- Radiation Detection and Scintillator Technologies
European Synchrotron Radiation Facility
2015-2024
European Science Foundation
2016-2024
Brookhaven National Laboratory
2012-2017
Brookhaven College
2014
GANIL
2010
Successful commissioning of a hybrid multibend achromat lattice at the European Synchrotron Radiation Facility demonstrates that ultralow emittance can be achieved with excellent lifetime and large dynamic aperture for high energy storage rings.
Local chromatic correction optics are proposed for the Future Circular <a:math xmlns:a="http://www.w3.org/1998/Math/MathML" display="inline"><a:msup><a:mi>e</a:mi><a:mo>+</a:mo></a:msup><a:mo>−</a:mo><a:msup><a:mi>e</a:mi><a:mo>−</a:mo></a:msup></a:math> Collider. These new assume an identical layout of magnets at all operation energies and include a design arcs, straight sections, final focus. The arcs is step forward from classic FODO lattice that achieves near cancellation up to fourth...
Head-on beam-beam compensation has been implemented in the Relativistic Heavy Ion Collider order to increase luminosity delivered experiments. We discuss principle of combining a lattice for resonance driving term and an electron lens tune spread compensation. describe technology its operational use. To date, scheme approximately doubled peak average luminosities.
A new international study has just been launched to design a hadron collider with centre-of-mass energy of the order 100 TeV in 80–100 km tunnel as long-term goal. The includes 90–350 GeV lepton collider, seen potential intermediate step, and an ep option. This paper reports on overall parameters preliminary optics designs special emphasis Interaction Regions constraints arising for having host both colliders. Preliminary hardware specifications, magnetic field, gradient, lengths aperture...
Top-up injection is an essential ingredient for the future circular lepton collider (FCC-ee) to maximize integrated luminosity and it determines design performance. In ttbar operation mode, with a beam energy of 175 GeV, lifetime ∼1 h shortest four anticipated operational modes, may be even shorter in actual operation. A highly robust top-up scheme consequently imperative. Various methods are investigated number suitable schemes considered developing alternative designs straight section...
Two electron lenses ($e$-lenses) have been in operation during the 2015 RHIC physics run as part of a head-on beam-beam compensation scheme. While lattice was chosen to reduce beam-beam-induced resonance-driving terms, reduced tune spread. This has demonstrated for first time. The scheme allows higher parameters and therefore intensities luminosity. In this paper, we detail design considerations verification beam $e$-lenses. Longitudinal transverse alignments with ion beams transfer function...
Accelerator Toolbox is a widely used code for beam dynamic simulations based on Matlab. To continue the development of in collaborative manner, SourceForge project and SVN repository called atcollab has been established. Here we describe contributions to from ESRF dynamics group. Additional modules have developed: general matching (atmatch), improved plotting (atplot), Touschek lifetime computation via Piwinski formula, nonlinear computations such as resonance driving terms, reporting lost...
The European Synchrotron Radiation Facility (ESRF) storage ring (SR) has been dismantled and replaced by the Extremely Brilliant Source (EBS) which now commissioned. This new fourth generation light source much smaller vacuum chambers than its predecessor, necessitates a careful optimization of systems an accurate impedance model to be able deliver all beam modes at design current predict future machine performance in presence strong collective effects. paper will report on first based...
Top-up operation was recently introduced at the European Synchrotron Radiation Facility (ESRF) to provide constant beam current line users. This mode of involves frequent injections that can be source significant perturbations on stored beam. Beam lines running experiments with a timescale longer than injection period may impacted by such perturbations. The ESRF storage ring systems and layout were not designed allow for transparent injection, i.e., without visible These are driven directly...
A head-on beam-beam compensation scheme was implemented for operation in the Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory [Phys. Rev. Lett. 115, 264801 (2015)]. The consists of electron lenses reduction induced tune spread, and a lattice minimization generated resonance driving terms. We describe implementations lenses, report on measurements properties effect hadron beam.
Abstract In 2020 the ESRF storage ring will be upgraded to a Hybrid Multi Bend Achromat (HMBA) lattice. The commissioning of new require dedicated tools, either updated from existing ones or newly developed. Most software and procedures were tested on before its decommissioning. particular we present experiments first-turn steering beam accumulation, check magnet polarity calibration, injection tuning. use control-system simulator proved crucial for debugging development control system, as...
A new system used for monitoring energetic Coulomb-scattered electrons as the main diagnostic accurately aligning electron and ion beams in Relativistic Heavy Ion Collider (RHIC) lenses is described detail. The theory of scattering from relativistic ions developed applied to design implementation achieve maintain alignment. Commissioning with gold 3He then well successful utilization during 2015 RHIC polarized proton run. Systematic errors method are estimated. Finally, some possible future...
The Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory has been operating since 2000. Over the past decade, thanks to continuously increased bunch intensity and reduced ${\ensuremath{\beta}}^{*}\mathrm{s}$ interaction points, peak luminosity in polarized proton operation by more than two orders of magnitude. In this article, we will present operational observations routine physics stores. mechanisms for beam loss, transverse emittance growth, lengthening are analyzed....
Significant magnetic cross talks were observed between neighboring magnets on the Extremely Brilliant Source (EBS) low emittance storage ring. The main sources for these are short longitudinal distances magnets, which reach 47 mm in some cases. It affects mainly dipole bending angles and quadrupole gradients. A 1% angle correction was applied to (permanent) before their installation ring compensate talks, while gradient errors as high 1.8% quadrupoles. Intensive 3D simulations gave...