Infrared synchrotron-accelerator diagnostic methods

Methods for measuring the current and geometric parameters and estimating the energy parameters of an annular bunch of relativistic low-energy electrons are presented. The methods employ the optical (predominantly infrared) part of the spectral distribution of the synchrotron radiation with the use of fast infrared detectors capable of detecting radiation in the spectral range Δλ⋍0.3–45 µm. A number of data acquistion and processing systems developed and produced at the Joint of Institute of Nuclear Research in order to implement the infrared synchrotron-accelerator diagnostics are described. These systems employ specially developed infrared optics elements. The radiation is detected with cooled Si, Pb, Se, InSb, GeAu, and LiNbO3 infrared detectors operating at room temperature. Examples of the implementation of these methods in accelerator experiments are presented.