Abstract
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.
Highlights
The European Synchrotron Radiation Facility (ESRF) accelerator complex, shown in Fig. 1, consists of a 200 MeV linac, a 6 GeV booster synchrotron and a 6 GeV storage ring light source
For the specific case of the short bend (SB), further validation of the successful realignment is provided by closed orbit measurements: since the movements were applied to magnets only, large beam position monitors (BPM) to quadrupoles offsets were expected
With a fully optimized storage ring, the machine operates routinely with insertion devices (ID) gaps closed at an injection efficiency of approximately 80%, below the design goal of 90%
Summary
The European Synchrotron Radiation Facility (ESRF) accelerator complex, shown in Fig. 1, consists of a 200 MeV linac, a 6 GeV booster synchrotron and a 6 GeV storage ring light source. The European Synchrotron Radiation Facility (ESRF) accelerator complex, shown, consists of a 200 MeV linac, a 6 GeV booster synchrotron and a 6 GeV storage ring light source. Following the successful completion of the ESRF upgrade phase I [1], consisting of mostly infrastructures and beam lines improvements, the ESRF upgrade program phase II [2] aimed at replacing the existing double bend achromat (DBA) storage ring by an entirely new machine with a target horizontal emittance smaller than 150 pm rad. The project was organized in three main phases resulting in an interruption of users service mode (USM, operation with user experiments) of 20 months: 12 months were allocated to the dismantling of the old storage ring and the installation of the new one, 3 months were dedicated to the machine commissioning, and 5 months to the beam lines commissioning.
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