Techniques for Handling and Removal of Spectral Channels in Fourier Transform Synchrotron-Based Spectra

Abstract

Channel spectra are a big problem for those attempting to use synchrotron-based Fourier transform spectra for spectral lineshape studies. Due to the layout of the optical system at the CLS far-infrared beamline, the synchrotron beam undergoes unavoidable multiple reflections on the steering mirrors, beam splitter, several sets of windows, and filters. We present a method for eliminating channel spectra and compare the results of our technique with other methods available in the literature.

Diffraction-limited mid-infrared microspectroscopy to reveal a micron-thick interfacial water layer signature

“…Interference fringes and Mie scattering effect are the two main features observed in the raw spectra, making them challenging to use for their analytical function. 85,86,89–92 Fig. 5A shows a sinusoidal baseline with an almost constant period recorded in all our spectra, whereas Fig.…”