Speaker
Description
In the scope of SOLEIL II, the booster must also be upgraded to reduce from 130 to 5 nm.rad the emittance of the beam delivered to the ring.
Control of the emittance in the booster will become crucial to ensure the nominal performance of the storage ring injection.
The SOLEIL I booster is already equipped with a Visible Synchrotron Radiation Monitor (MRSV). This equipment, made of an extraction mirror and a simple optical system, was originally planned to be used only for beam presence verification but has not been used routinely for operation since the commissioning in 2005.
The control and acquisition systems had been refreshed to be usable again and allow the beam size measurement along the booster energy ramp. Those measurements have been compared to simulations and give promising results, still, the beam size measured is always larger than predictions. We attribute this effect to the minimum exposure time of the camera (24 µs, i.e. ~45 turns in the booster) and beam position fluctuations, but to properly validate this hypothesis, we decided to use a new camera with a minimum exposure time of 1 µs (i.e. 1 or 2 turns). The first results were surprising and led to a detailed study of camera properties (pixel size, ...) and their interaction with optical properties like depth of fields. This discussion resumes the main results of the study.
