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Instrumentation for Far-Infrared Spectroscopy.

DE2001781128

Publication Date	2001
Personal Author	Griffiths, P. R.; Homes, C.
Page Count	44
Abstract	Measurements of far-induced spectra are made far more difficult than the corresponding measurement of mid- or near-infrared spectra because of the weakness of the source. The spectral energy density of a black-body at 1400K is almost 5800 times weaker at 10 cm, and about 60 times weaker at 100 cm, than it is at 1000 cm. Since the sensitivity of any measurement of a mid- or far-infrared spectrum is directly proportional to the spectral energy density of the source, it is apparent that far-infrared sources should be as hot as possible and have an emittance of close to unity.
Keywords	Infrared spectroscopy Instrumentation Infrared spectra Detectors Infrared radiation Measurements Wavelengths Synchrotons Emission Thermal conductivity Density
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Brookhaven National Lab., Upton, NY. Physics Dept.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200122

Instrumentation for Far-Infrared Spectroscopy.

Instrumentation for Far-Infrared Spectroscopy.
DE2001781128

Publication Date	2001
Personal Author	Griffiths, P. R.; Homes, C.
Page Count	44
Abstract	Measurements of far-induced spectra are made far more difficult than the corresponding measurement of mid- or near-infrared spectra because of the weakness of the source. The spectral energy density of a black-body at 1400K is almost 5800 times weaker at 10 cm, and about 60 times weaker at 100 cm, than it is at 1000 cm. Since the sensitivity of any measurement of a mid- or far-infrared spectrum is directly proportional to the spectral energy density of the source, it is apparent that far-infrared sources should be as hot as possible and have an emittance of close to unity.
Keywords	Infrared spectroscopy Instrumentation Infrared spectra Detectors Infrared radiation Measurements Wavelengths Synchrotons Emission Thermal conductivity Density
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	Brookhaven National Lab., Upton, NY. Physics Dept.; Department of Energy, Washington, DC.
Supplemental Notes	Sponsored by Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200122