A VACUUM ULTRAVIOLET

摘要

A small ceramic ion chamber has been developed for a rocket astronomy program in the vacuum ultraviolet. The chamber consists of a small metal plated ceramic shell incorporating a window of LiF, CaF2 or BaF2 and containing one of several fill gases such as nitric oxide, acetone, or carbon disulfide. Typical quantum efficiencies range from 8-10 percent for acetone with a CaF2 window to 50-60 percent for carbon disulfide with a LiF window. Details of the chamber construction are given and some recent applications of the detector are described.