Infrared synchrotron radiation, review of properties and prospectives

Gwyn P. Williams

doi:10.1117/12.366630

25 October 1999 Infrared synchrotron radiation, review of properties and prospectives

Gwyn P. Williams

Proceedings Volume 3775, Accelerator-based Sources of Infrared and Spectroscopic Applications; (1999) https://doi.org/10.1117/12.366630
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

Abstract

In this paper we review the properties of infrared sources, setting the synchrotron in perspective among lasers and thermal sources. Synchrotron radiation is ideal for spectroscopy on small samples and has enjoyed extensive utilization throughout the world with some 27 beamlines either in operation or planned. It is a broadband source, which is 1000 times brighter than standard thermal sources. It is polarized, pulsed on the nanosecond scale, highly spatially coherent and is also an absolute source making it possible to perform accurate absorption or reflection measurements. The high brightness makes it ideal for spectroscopy on samples with limited throughput and the main focus has been the realization of very high signal to noise values, not only on small samples, but in the far infrared where the 300 K background is a major contributor to the noise. However, synchrotron radiation is not suitable for high power or non-linear applications. Modern free-electron lasers are up to 8 orders of magnitude brighter than synchrotron radiation at the wavelengths at which they operate.

Citation Download Citation

Gwyn P. Williams "Infrared synchrotron radiation, review of properties and prospectives", Proc. SPIE 3775, Accelerator-based Sources of Infrared and Spectroscopic Applications, (25 October 1999); https://doi.org/10.1117/12.366630

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