Synchrotron radiation insertion devices

Polarization. The central cone of the synchrotron beam from a bending magnet and, in general, the beam from insertion devices is polarized in the plane of the orbit (i.e., horizontally). Due to relativistic effects the cone of the radiation characteristics is narrow even if the beam is emitted from a bending magnet (cf. [10], p. 9-13 and Sect. 2.2.2). If necessary, polarization correction should be carried out directly at the synchrotron radiation facility by means of the locally available computer programs. 

The X-ray source may be a conventional sealed tube or rotating anode generator or bending magnet synchrotron radiation and more recently the exploitation of multipole insertion devices such as wigglers and undulators represent great gains in source intensity. 

Recent developments in Mossbauer spectroscopy may also lead to interesting high-pressure applications. Many years ago it was proposed that the special properties of synchrotron radiation could be used to provide nuclear excitation without the use of radioactive sources, and recently progress with modern synchrotron-radiation sources could mean that such experiments could be feasible for Fe. Due to the natural high collimation of the most favourable undulator radiation from synchrotron insertion devices, one can expect that high-pressure measurements will be one of the first applications of this technique, which will eventually be applied to isotopes for which no suitable radioactive sources exist. " ... 

Elleaume P (1987) Design considerations for the insertion devices and beam front ends of the ESRF, Madison Conference on Synchrotron Radiation, extended abstracts, ESRF-Report, CONF-87-08... 

Figure 2.4 Schematics of a synchrotron radiation facility. The closed circuit on the left represents the storage ring. IS, injection system RF, radiofrequency cavity L, beamline BM, bending magnets FM, focusing magnets ID, insertion device.

The insertion devices (ID in Figure 2.4), which are additional devices, such as wigglers and undulators, inserted into straight sections of the ring. They further modify the electron trajectories from a straight line, and thereby induce emission of additional synchrotron radiations, as explained shortly. 

A typical synchrotron radiation experiment at a third-generation source using an insertion device beamline results in the deposition of a significant amount of power in a... 

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