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The source issue in infrared microspectroscopy
- Source :
- Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 483:565-570
- Publication Year :
- 2002
- Publisher :
- Elsevier BV, 2002.
-
Abstract
- Infrared spectroscopy using a Fourier Transform Infrared (FTIR) spectrometer is routine. These instruments are sophisticated and mature, and generally use a blackbody radiator as their infrared source. However, because the brightness of a thermal source is limited, the signal-to-noise ratio of these instruments begins to degrade at spatial resolutions not much better than 1 mm and they are rarely useful at resolutions smaller than 20 μm. Synchrotrons provide much brighter infrared beams than thermal sources, and Free-Electron Lasers (FELs) provide even brighter beams than synchrotrons. We will discuss the limitations of thermal sources, and show that a synchrotron is an excellent source for infrared spectroscopy at spatial resolutions on the order of the wavelength (λ). Even better spatial resolution, about λ/10, can be expected if an FEL is used as a source.
- Subjects :
- Physics
Nuclear and High Energy Physics
Brightness
Spectrometer
business.industry
Infrared
Astrophysics::High Energy Astrophysical Phenomena
Infrared spectroscopy
Astrophysics::Cosmology and Extragalactic Astrophysics
Laser
law.invention
Optics
Far infrared
law
Thermal infrared spectroscopy
Physics::Accelerator Physics
Fourier transform infrared spectroscopy
business
Instrumentation
Astrophysics::Galaxy Astrophysics
Subjects
Details
- ISSN :
- 01689002
- Volume :
- 483
- Database :
- OpenAIRE
- Journal :
- Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
- Accession number :
- edsair.doi...........d4ab7b25efd8676c487f6ef919656e0f