Alexis Gamelin

mbtrack2

Alexis Gamelin, Watanyu Foosang, Naoto Yamamoto, V. Gubaidulin et autres

mbtrack2 is a coherent object-oriented framework written in python to work on collective effects in synchrotrons.

fr, jp (code pays fourni par la source)

SOLEIL II BPMs development progress

Moussa El Ajjouri, Nicolas Hubert, Filipe S. Alves, Zhengxuan Fan et autres

SOLEIL II is the low emittance upgrade project for Synchrotron SOLEIL, targeting an emittance of ~80 pm.rad. The new lattice includes 196 Beam Position Monitors (BPM) distributed in 3 different types depending on the vacuum chamber diameter. To ensure consistent signal levels …

Interaction of intrabeam scattering, longitudinal wakefield and a passive harmonic rf cavity in SOLEIL II

V. Gubaidulin, S. E. Feddaoui Dellalou, Alexis Gamelin, S. Habet et autres

Abstract Synchrotron light sources worldwide are transforming into next-generation facilities with ultra-low transverse emittances at the diffraction limits. With these parameters, intrabeam scattering (IBS) becomes significant and can spoil the light quality by increasing the natural emittance and energy spread. A harmonic …

fr (code pays fourni par la source)

Transverse beam instabilities in low-emittance booster synchrotrons

Watanyu Foosang, Alexis Gamelin, V. Gubaidulin, R. Nagaoka

As the ring-based light source community is moving toward fourth-generation light sources, many facilities plan to upgrade their boosters in parallel to meet the more demanding beam properties for the storage ring, especially in terms of a much lower emittance. Concerns over …

fr (code pays fourni par la source)

Semianalytical algorithms to study longitudinal beam instabilities in double rf systems

Alexis Gamelin, V. Gubaidulin, Murilo B. Alves, Teresia Olsson

Double rf systems are critical for achieving the parameters of fourth-generation light sources. These systems, comprising both main and harmonic rf cavities, relax statistical collective effects but also introduce instabilities, such as Robinson and periodic transient beam loading (PTBL) instabilities. In this …

fr, br, de (code pays fourni par la source)

Space charge effects in fourth-generation light sources: The PETRA IV and SOLEIL II cases

Sergey Antipov, V. Gubaidulin, Ilya Agapov, E. C. Cortés García et autres

It is a truth universally acknowledged that space-charge effects in ultrarelativistic electron storage rings are irrelevant due to the steep inverse dependence of their strength on the Lorentz factor. Yet, with the push toward the diffraction limit, the state-of-the-art light sources are …

de, fr (code pays fourni par la source)

Commissioning of ThomX Compton source subsystems and demonstration of 10 10 x-rays/s

Muath Alkadi, M.A. Alves, Manar Amer, Loïc Amoudry et autres

ThomX is a compact x-ray source based on Compton scattering, installed at IJCLab (Laboratoire de physique des 2 infinis-Irène Joliot-Curie) in Orsay. The machine uses a small electron storage ring and an intense laser pulse stored in a high-finesse optical cavity. This …

fr (code pays fourni par la source)

Transverse beam instabilities in low-emittance booster synchrotrons

Watanyu Foosang, Alexis Gamelin, V. Gubaidulin, R. Nagaoka

As the ring-based light source community is moving towards fourth-generation light sources, many facilities plan to upgrade their boosters in parallel to meet the more demanding beam properties for the storage ring, especially in terms of a much lower emittance. Concerns over …

fr (code pays fourni par la source)

Space Charge and Future Light Sources

Sergey Antipov, V. Gubaidulin, Ilya Agapov, E. C. Cortés García et autres

International audience

fr, de (code pays fourni par la source)

First production of X-rays at the ThomX high-intensity Compton source

M. Jacquet, Patrick Alexandre, Muath Alkadi, M.A. Alves et autres

fr, us, it, ch (code pays fourni par la source)

Beam Dynamics Using Superconducting Passive Harmonic Cavities with High Current per Bunch

Alexis Gamelin, V. Gubaidulin, Alexandre Loulergue, Patrick Marchand et autres

In 4th generation synchrotron light sources, harmonic cavities (HCs) are critical components needed to achieve the required performance. They provide longer bunches, which helps to reduce statistical effects (intra-beam scattering and Touschek effect). In "timing" modes, where the bunch spacing is larger …

fr, jp (code pays fourni par la source)

Bunch-lengthening RF System Using Active Normal-conducting Cavities

Naoto Yamamoto, Alexis Gamelin, Patrick Marchand, Daichi Naito et autres

Bunch lengthening using a double RF system (fundamental + harmonic cavities) is essential in preserving the extremely low emittance in fourth and future generation synchrotron light rings. Recent studies have revealed that, in many cases, unstable beam motions, as so-called "mode-0" and …

jp, fr (code pays fourni par la source)