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We discuss the design, current status, and ongoing development of a cryogenic delay line for long-baseline direct-detection interferometry in the far-infrared.
We discuss the design, current status, and ongoing development of a cryogenic delay line for long-baseline direct-detection interferometry in the far-infrared.
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The SAFIRE experiment was conceived to satisfy a long-standing need for simultaneous middle atmosphere observations of ozone and important O(y), HO(y), NO(y), ClO(y), and BrO(y) gases, coupled with dynamics data. This will be accomplished using interferometry and broadband radiometry to sound the Earth limb in the far IR and mid IR, respectively. The experiment will employ the latest developments in detector and cryogenic cooling technology in order to achieve the measurement objectives. Detailed instrument and simulated atmospheric retrieval studies show that important gases such as OH, HO2, H2O2, HDO, N2O5, and HOCl can be observed with good accuracy.