A wiggler is an essential component of a synchrotron beamline. It is the source of the radiation supplied to the beamlines or experimental stations. A wiggler consists of a series of magnets, either permanent or superconducting. These magnets are set up with alternate magnetic fields, which, if installed in an electron storage ring or synchrotron, force the electrons to oscillate as they pass through. These oscillations lead to the emission of intense and highly collimated electromagnetic radiation with wavelengths over a broad spectrum, from the visible light to hard X-rays. This synchrotron light then passes through optical and collimating devices (front end, monochromator) which tailor the beam’s spectrum and geometry according to the needs of the scientists. Scientists use these bright X-rays to explore the structural and dynamical properties of materials and living matter
The BEATS beamline will use a 3-pole wiggler for its source of X-rays. The device will boost the energy range of the X-ray spectrum to values of up to 60 KeV and more with sufficient flux. To do this on a 2.6 GeV machine, like the SESAME synchrotron, permanent magnets produce a high magnetic field, in our case 3 Tesla.
The photo shows the mechanical structure of the 3-pole wiggler at the manufacture, Kyma, in Slovenia. This structure will host the magnetic assembly.
Once the permanent magnets have been installed in the structure, a team from BEATS will test the magnetic field by means of high-precision measurements with a magnetic probe in 3D. The whole structure, ready for installation on the beamline, will then be shipped directly to SESAME in January 2022.