We describe a CO2 laser interferometer which measures the path-integrated density along eight different chords simultaneously in the ZT-40 reversed-field pinch, a toroidal magnetic confinement experiment at Los Alamos. The interferometer system combines several reliable, commercially available components in a package which provides exceptional measurement resolution as well as ease of operation and maintenance.
A. R. Jacobson,
L. J. Jolin,
"Eight-Chord CO2 Interferometer For Plasma Density Measurements On ZT-40", Proc. SPIE 0288, Los Alamos Conf on Optics '81, (30 December 1981); doi: 10.1117/12.932054; https://doi.org/10.1117/12.932054