Accelerators performance and selection of main achievements in 2020 ACCELERATORS PERFORMANCE FIGURE 1 SOLEIL continues to deliver high stability photon beams to the 29 beamlines (BLs), 20 on insertion devices (IDs), 9 on bending magnets. The CoViD-19 crisis impacted the yearly calendar with a national lockdown of 7 weeks (reduction of the user beam and shortening of the May technical shutdown). The facility was back online successfully while establishing strict safety rules for the staff and the users. Despite this very difficult national and international context with many restrictions, a total of 4096 hours (52.5% hybrid (450 mA), 47.4% uniform (500 mA), 3.5% 1 bunch (16 mA) and 3.5% 8 bunch (100 mA) filling patterns, and 0.4% for BL safety tests) was provided to the beamlines In terms of equipment reliability, the control of the IDs has with a beam availability of 98.8% and a large 105 hours mean been hardened leading to a reduction of the control errors time between failure. Adding together 9 weeks with 100% and by a factor of more than 2 (graduate migration of the PLCs 18 with more of 99% beam availability, the performance was (Programmable Logic Controller) driving the IDs from TLCC remarkable thanks to the dedication of all the teams. Overall, to TM258, better management of the hardware errors). As a since mid-May 2020, the original beam calendar has been preventive maintenance, the 4 permanent magnet chicane of respected, responding to the high demand of user projects. the two long beamlines in long straight section SDL13 was Only few accelerators’ projects were delayed. replaced and commissioned in January 2020. SELECTION OF ACHIEVEMENTS A new type of beam loss monitors has been installed inside the FOR ACCELERATORS tunnel, all around the storage ring: 80 plastic scintillators with The improvement of the RadioFrequency (RF)-system now photo-multiplicators allow accurate monitoring of slow losses allows the operation of the storage ring at 500 mA even if 1 of by lifetime and fast losses during the injection. They are key the 4 RF-cavities is unpowered. First beam tests with only 2 diagnostics for the accelerator characterization and optimization. RF-cavities resulted in storage of up to 450 mA. Moreover, they will be intensively used by the radiation safety section to qualify the shielding walls for the SOLEIL upgrade. In addition to the requirement for position and angle stability of The superbend for the ROCK BL is well on track: the dipole in the BL photon source points, a few beamlines (PROXIMA-1, permanent magnet technology has been fully assembled in- PROXIMA-2A, ANATOMIX and NANOSCOPIUM) require a house. Magnetic measurements have started (Figure 2). The higher beam-size stability than currently achieved. The main magnetic field will rise locally from 1.71 to nearly 2.8 T enables perturbation is related to the ID configuration freely controlled a factor 5 increase in flux at 40 keV. The vertical narrower gap by the BLs. Since May 2020, a new type of feedback has dipole chamber is ready for installation in early 2021. significantly improved the vertical beam size stability. Instead of As a key element for making a compact injection scheme, the modulating a vertical dispersion wave, a white noise is injected multipole injection kicker (MIK) has been fully assembled and onto the beam using the new bunch by bunch transverse magnetically characterized. Its sapphire chamber was coated feedback processor: a 2 Hz feedback improved the vertical at ESRF with a thin titanium layer to allow the image current to beam size to 0.7% and less than 2% during slow and fast ID circulate. Its installation is scheduled also for early 2021 (See motions, respectively (Figure 1). Figure 3). 94