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Sensitivity Issues in Step-Scan FT-IR Spectrometry

The source cooling jacket is a cold-sink for convective heat transfer from the laser and the globar radiating element. To reduce heat transfer, it was insulated with blown polyolefin pipe insulation on the cylinder walls, and with fiberglass wool on top where it is too hot for polyolefin. An IR transparent crystal is used to prevent the escape of heated air through the aperture.

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