From Event: SPIE Optical Engineering + Applications, 2017
Future soft X-ray spectroscopy missions have science requirements that demand higher instrument throughput and higher resolution than currently available technology. A key element in such spectrometers are dispersive elements such as diffraction gratings. Our group at Penn State University develops and fabricates off-plane reflection gratings in an effort to achieve the level of performance required by future missions. We present here efficiency measurements made in the 0.2 – 1.3 keV energy band at the Advanced Light Source (ALS) at Lawrence Berkley National Laboratory for one such grating, which was fabricated to achieve the high-throughput required for future observatories. This grating was replicated from a grating master using UV-nanoimprint techniques which are suitable for mass-production and is coated in a layer of gold. Total absolute diffraction efficiency was measured to be ~55-65% across the energy range, with relative diffraction efficiency approaching 90%. These results represent the first successful demonstration of off-plane grating replicas produced via these fabrication techniques and exceed the grating efficiency requirements for future X-ray missions.
Drew M. Miles, Jake McCoy, Randall L. McEntaffer, and Casey T. DeRoo, "Diffraction efficiency of a replicated large-format x-ray reflection grating (Conference Presentation)," Proc. SPIE 10399, Optics for EUV, X-Ray, and Gamma-Ray Astronomy VIII, 1039913 (Presented at SPIE Optical Engineering + Applications: August 09, 2017; Published: 19 September 2017); https://doi.org/10.1117/12.2272605.5581299333001.
Conference Presentations are recordings of oral presentations given at SPIE conferences and published as part of the conference proceedings. They include the speaker's narration along with a video recording of the presentation slides and animations. Many conference presentations also include full-text papers. Search and browse our growing collection of more than 12,000 conference presentations, including many plenary and keynote presentations.