American Nuclear Society

Home / Publications / Journals / Fusion Science and Technology / Volume 70 / Number 2

Direct Writing Target Structures by Two-Photon Polymerization

L. J. Jiang, J. H. Campbell, Y. F. Lu, T. Bernat, N. Petta

Fusion Science and Technology / Volume 70 / Number 2 / August-September 2016 / Pages 295-309

Technical Paper /

First Online Publication:July 11, 2016
Updated:August 9, 2016

Two-photon polymerization (2PP) offers an attractive option for direct writing micron- to millimeter-sized laser target components that support high-energy-density plasma physics research. 2PP was used to deterministically print a number of common targetlike structures including tubes, spatially periodic Rayleigh-Taylor–like surfaces, and low-density foams. The structures were printed using commercially available acrylic photoresins. The elemental compositions are reported for comparison with other polymers used for making target components. A number of foamlike structures ranging in size from tens to hundreds of microns and varying in density from 600 to 60 mg/cm3 were readily printed in times ranging from several seconds to a few hours depending on the size. In addition, direct printing was demonstrated to fabricate graded-density foam comprising 12 individual layers with a vertical density gradient of 600 to 80 mg/cm3. Control of shrinkage and deformation during development and subsequent drying remains a challenge for certain structures and a focus of ongoing research.

Questions or comments about the site? Contact the ANS Webmaster.