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Local chromatic correction optics for Future Circular Collider Open
Local chromatic correction optics are proposed for the Future Circular e+−e− Collider. These new optics assume an identical layout of the magnets at all operation energies and include a new design for the arcs, for the straight sections, a…
View article: Bayesian optimization algorithms for accelerator physics
Bayesian optimization algorithms for accelerator physics Open
Accelerator physics relies on numerical algorithms to solve optimization problems in online accelerator control and tasks such as experimental design and model calibration in simulations. The effectiveness of optimization algorithms in dis…
View article: Selected advances in the accelerator design of the Future Circular Electron-Positron Collider (FCC-ee)
Selected advances in the accelerator design of the Future Circular Electron-Positron Collider (FCC-ee) Open
In autumn 2023, the FCC Feasibility Study underwent a crucial “mid-term review”. We describe some accelerator performance risks for the proposed future circular electron- positron collider, FCC-ee, identified for, and during, the mid-term …
View article: The status of the FCC-ee optics tuning
The status of the FCC-ee optics tuning Open
With a circumference of approximately 91 km, the Future Circular electron-positron Collider, FCC-ee, aims for unprecedented luminosities at beam energies from 45.6 to 182.5 GeV. A major challenge is reaching its design performance in the p…
View article: Off-energy operation for the Extremely Brilliant Source at the European Synchrotron Radiation Facility
Off-energy operation for the Extremely Brilliant Source at the European Synchrotron Radiation Facility Open
The European Synchrotron Radiation Facility Extremely Brilliant Source (ESRF-EBS) is the first fourth generation 6 GeV storage ring (SR) light source making use of the hybrid multibend achromat lattice, reaching a natural horizontal emitta…
View article: Nonlinear Dynamics Measurements at the EBS Storage Ring
Nonlinear Dynamics Measurements at the EBS Storage Ring Open
The EBS is a 4th generation synchrotron light source and it has been in user operation since August 2020 at the ESRF. Several measurements to characterise the nonlinear dynamics have been performed in 2023: nonlinear chromaticity, second o…
View article: Update on the EBS Storage Ring Beam Dynamics Digital Twin
Update on the EBS Storage Ring Beam Dynamics Digital Twin Open
The EBS storage ring control system is presently paired with an electron beam dynamics digital twin (the EBS control system simulator, EBSS*). The EBSS reproduces many of the beam dynamics related quantities relevant for machine operation.…
View article: Optimisation of the Touschek Lifetime in Synchrotron Light Sources Using Badger
Optimisation of the Touschek Lifetime in Synchrotron Light Sources Using Badger Open
Badger* is a software designed to easily access several optimizers (simplex, RCDS**, bayesian optimization, etc.) to solve a given multidimensional minimization/maximization task. The Badger software is very flexible and easy to adapt to d…
View article: Commissioning simulations tools based on python Accelerator Toolbox
Commissioning simulations tools based on python Accelerator Toolbox Open
Storage ring commissioning-like simulations are necessary to assess the feasibility of proposed future lattice designs. This paper proposes a python package for commissioning-like simulations based on python accelerator toolbox (pyAT). The…
View article: Bayesian Optimization Algorithms for Accelerator Physics
Bayesian Optimization Algorithms for Accelerator Physics Open
Accelerator physics relies on numerical algorithms to solve optimization problems in online accelerator control and tasks such as experimental design and model calibration in simulations. The effectiveness of optimization algorithms in dis…
View article: Python Library for Simulated Commissioning of Storage-Ring Accelerators
Python Library for Simulated Commissioning of Storage-Ring Accelerators Open
Simulations of the commissioning procedure became vital to the storage-ring lattice design process. The achievable tolerances on lattice imperfections, such as equipment misalignments or magnet gradient errors, would, without correction, p…
View article: Progress of the FCC-ee optics tuning working group
Progress of the FCC-ee optics tuning working group Open
FCC-ee is a proposed lepton collider with a circumference close to 100 km to produce an unprecedented amount of luminosity. The FCC-ee optics tuning working group is addressing one of the most critical aspects of the FCC-ee, that is the re…
View article: Beam based characterization of the European Synchrotron Radiation Facility Extremely Brilliant Source short range wakefield model
Beam based characterization of the European Synchrotron Radiation Facility Extremely Brilliant Source short range wakefield model Open
The European Synchrotron Radiation Facility (ESRF) storage ring (SR) has been dismantled and replaced by the Extremely Brilliant Source (EBS) which has now been commissioned. This new fourth generation light source has much smaller vacuum …
The Extremely Brilliant Source storage ring of the European Synchrotron Radiation Facility Open
The Extremely Brilliant Source (EBS) is the experimental implementation of the novel Hybrid Multi Bend Achromat (HMBA) storage ring magnetic lattice concept, which has been realised at European Synchrotron Radiation Facility. We present it…
Toward a diffraction limited light source Open
International audience
View article: Lifetime correction using fast-off-energy response matrix measurements
Lifetime correction using fast-off-energy response matrix measurements Open
Following the measurements done at MAX-IV [1], we try to exploit for the ESRF-EBS Storage Ring (SR) off-energy response matrix measurement for the optimization of Touschek lifetime. The measurements performed with fast AC steerers on- and …
View article: Reverse bend option for a 6 GeV storage ring lattice
Reverse bend option for a 6 GeV storage ring lattice Open
Several high-energy synchrotron facilities adopted the Hybrid Multi-Bend Achromat scheme (HMBA) developed for the ESRF-EBS [1]. The considered lattice has been developed for a generic 6 GeV storage ring (SR) of 1100 m circumference [2]. It…
View article: The ESRF-EBS Simulator: A Commissioning Booster
The ESRF-EBS Simulator: A Commissioning Booster Open
The ESRF-Extremely Brilliant Source (ESRF-EBS)* is the first-of-a-kind fourth-generation high-energy synchrotron. After only a 20-month shutdown, scientific users were back to carry out experiments with the new source. The EBS Simulator (E…
View article: Online Optimization of the ESRF-EBS Storage Ring Lifetime
Online Optimization of the ESRF-EBS Storage Ring Lifetime Open
In the first year of operation of the EBS storage ring, online nonlinear dynamics optimisations were performed to increase the Touschek lifetime. Several sextupole, octupole and skew quadrupole knobs have been studied in simulations and te…
View article: Off-Energy Operation for the ESRF-EBS Storage Ring
Off-Energy Operation for the ESRF-EBS Storage Ring Open
The ESRF-EBS is the first 4th generation source making use of the Hybrid Multi-Bend Achromat (HMBA) lattice cell, reaching an equilibrium horizontal emittance of 140 pm.rad in user mode (insertion devices (ID) gaps open). The injection in …
View article: Options for a Light Upgrade of the ESRF Booster Synchrotron Lattice
Options for a Light Upgrade of the ESRF Booster Synchrotron Lattice Open
The EBS 6 GeV electron storage ring recently commissioned at ESRF, in Grenoble, France, is still operated using the old injector hardware. It is now one of the limiting factor of the facility. The large horizontal emittance of the booster …
View article: First Year of Operation of the ESRF-EBS Ligth Source
First Year of Operation of the ESRF-EBS Ligth Source Open
The European Synchrotron Radiation Facility - Extremely Brilliant Source (ESRF-EBS) is a facility upgrade allowing its scientific users to take advantage of the first high-energy 4th generation light source. In December 2018, after 30 year…
View article: FILO: A New Application to Correct Optics in the ESRF-EBS Storage Ring
FILO: A New Application to Correct Optics in the ESRF-EBS Storage Ring Open
A new optics correction application (Fit and Improvement of Linear Optics, FILO) was designed and set in place for the ESRF-EBS storage ring. The widely used software LOCO* is not available at ESRF and despite a few trials to set it in ope…
View article: Lifetime Correction Using Fast-Off-Energy Response Matrix Measurements
Lifetime Correction Using Fast-Off-Energy Response Matrix Measurements Open
Following the measurements done at MAX-IV * we try to exploit for the ESRF-EBS Storage Ring (SR) off-energy response matrix measurement for the optimization of Touschek lifetime. The measurements performed with fast AC steerers on- and off…
View article: A Long Booster Option for the ESRF-EBS 6 GeV Storage Ring
A Long Booster Option for the ESRF-EBS 6 GeV Storage Ring Open
Despite the several fruitful upgrades undergone, the present injector complex of the ESRF-EBS has a rather large horizontal natural emittance at extraction of >60nmrad. Several light sources (SLS, ALBA, SIRIUS) have adopted booster injecto…
View article: Commissioning of the hybrid multibend achromat lattice at the European Synchrotron Radiation Facility
Commissioning of the hybrid multibend achromat lattice at the European Synchrotron Radiation Facility Open
The European Synchrotron Radiation Facility (ESRF) operates a 6 GeV fourth generation light source, the ESRF-Extremely Brilliant Source (EBS). This storage ring is the first to implement the hybrid multibend achromat lattice (HMBA) that pr…
Cross talks between storage ring magnets at the Extremely Brilliant Source at the European Synchrotron Radiation Facility Open
International audience
View article: Operation of the ESRF Booster with the New EBS Storage Ring
Operation of the ESRF Booster with the New EBS Storage Ring Open
The Extremely Brilliant Source (EBS) has replaced the old ESRF Storage Ring (SR) during the 2019 one-year shutdown. The injector chain, composed of a Linac, a booster synchrotron, and two transfer lines, was not replaced. Nevertheless, som…
View article: Recovering the Positron Beam After Muon Production in the Lemma Muon Source
Recovering the Positron Beam After Muon Production in the Lemma Muon Source Open
In the LEMMA muon source proposal* a positron beam at 45 GeV is used to produce muons at threshold by interaction with some targets. In order to release the required intensity on the main positron source, orders of magnitude higher than th…
View article: ESRF-EBS: Implementation, Performance and Restart of User Operation
ESRF-EBS: Implementation, Performance and Restart of User Operation Open
The European Synchrotron Radiation Facility - Extremely Brilliant Source (ESRF-EBS) is a facility upgrade allowing its scientific users to take advantage of the first high-energy 4th generation light source. In December 2018, after 30 year…