Three-dimensional characterization of high-density non-cylindrical pulsed gas jets

摘要

We report a full characterization of the three-dimensional density profile of non-cylindrical and cylindrical high-density pulsed gas jets by using a double orthogonal Mach-Zehnder interferometer. A simultaneous algebraic reconstitution technique (SART) algorithm was fully implemented for data inversion, thus constituting a novel approach to the current methods of inversion employed in this area. Also characterized is the collision of two jets produced by rectangular nozzles never to our knowledge reported before in the literature. Results obtained point to densities eight to twelve times larger than the sum of that of each separate jet, rendering this configuration extremely useful in laser-plasma interaction experiments, where higher densities are required, with no need to increase backing pressure. A theoretical model describing the density profiles obtained for the non-cylindrical jets is presented, and the results obtained are discussed.