Sources & Accelerators

SOLEIL is a source of the third generation type. This generation of synchrotrons was built in the 1990’s and is characterized by a synchrotron light emission all along the storage ring circumference, in the bending magnets – which bend the electrons trajectory – as well as in the straight sections equipped with the wigglers and the undulators. At SOLEIL, more than 42% of the storage ring circumference was reserved to these exceptional light sources called “The insertion devices”.

Storage Ring
Insertion devices
A novel method to study new short pulse light sources  

In recent years, light sources have been central to research. Whether they are small enough to sit on a "table", or form large instruments of hundreds of meters, they help to push the scale limits of spatial-temporal studies. In this sense, recent free-electron lasers or other sources of high-order harmonic generation are the subject of intense development, while some of their characteristics are so far impossible to measure. A theoretical study by physicists at SOLEIL synchrotron and published in early March in the journal Nature Communications proposes a new method to accurately determine the temporal dimensions of the pulses delivered by these new light sources. [Full story]

  More information | All the news
Storage Ring

The storage ring characteristics condition part of the performance of the whole installation. SOLEIL storage ring is extremely compact and however reserves a very large part to the most powerful Light source. It was also conceived to satisfy all the categories of users, as well by the choice of the nominal energy of mahine operation as byt he two possible operating modes.

 Main Parameters | Parameters at the source points | Operation Modes | Brilliance |
Beam position stability |Bunch length |


SOLEIL machine is made up of 2 accelerators (a linear accelerator, the LINAC, and a circular one, the BOOSTER) and of a storage ring, a 354 m perimeter polygon - it accomodates the magnetic elements (dipoles and undulators) which bend the electrons trajectory. With each curve, then, the electrons lose energy, which produces synchrotron light.

Insertion devices

Third generation synchrotrons, such as SOLEIL, use magnetic devices called "undulators", which are inserted along the storage ring perimeter. They consist of sets of coils or permanent magnets juxtaposed along two jaws which force the electrons into an undulated movement. With each undulation, the electron bunches emit a thin beam of coherent light. 

Insertion devices | HU640 | HU256 | HU80




 Machine schedule :
2014 | 2015

 Machine status

 The front ends
(november 2006)



 Outreach area