title: Nonresonant cavity as a long path absorption cell.
abstract: We have constructed spherical specularly reflecting nonresonant cavities for use as absorption cells in far ir spectroscopy. A theory of their performance is developed and shown to be in agreement with experiment. An example is given of their use in a research program to ascertain the composition of water vapor. The essential advantage of these cells is that they give long pathlengths with high energy throughput.
authors.forename: H A
authors.initials: HA
authors.lastname: Gebbie
authors.forename: R A
authors.initials: RA
authors.lastname: Bohlander