A technique for the creation of free-standing cryogenic targets for laser-driven ion acceleration is presented, which allows us to create solid state targets consisting of initially gaseous materials. In particular, the use of deuterium and the methods for its preparation as a target material for laser-driven ion acceleration are discussed. Moving in the phase diagram through the liquid phase leads to the substance covering an aperture on a cooled copper frame where it is solidified through further cooling. An account of characterization techniques for target thickness is given, with a focus on deducing thickness values from distance values delivered by chromatic confocal sensors.
Creation and characterization of free-standing cryogenic targets for laser-driven ion acceleration
Alexandra Tebartz, Stefan Bedacht, Markus Hesse, Sam Astbury, Rob Clarke, Alex Ortner, Gabriel Schaumann, Florian Wagner, David Neely, Markus Roth; Creation and characterization of free-standing cryogenic targets for laser-driven ion acceleration. Rev. Sci. Instrum. 1 September 2017; 88 (9): 093512. https://doi.org/10.1063/1.5001487
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