Experimental evaluation of enhancement of diffraction efficiency by overcoating diamond-like carbon (DLC) on soft x-ray laminar-type gratings

Takashi Imazono, Masato Koike, Tetsuya Nagano, Hiroyuki Sasai, Yuki Oue, Satoshi Kuramoto, Masami Terauchi, Hideyuki Takahashi, Satoshi Notoya, Takanori Murano, Eric M. Gullikson

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Efficiently detecting the B-K emission band around 6.76 nm from a trace concentration of boron in steel compounds has motivated a theoretical exploration of means of increasing the diffraction efficiency of a laminar grating with carbon overcoating. To experimentally evaluate this enhancement, a Ni grating was coated with a high-density carbon film, i.e., diamond-like carbon (DLC). The first order diffraction efficiencies of the Ni gratings coated with and without DLC were measured to be 25.8 % and 16.9 %, respectively, at a wavelength of 6.76 nm and an angle of incidence of 87.07°. The ratio of diffraction efficiency obtained experimentally vs. that calculated by numerical simulation is 0.87 for the DLC-coated Ni grating. The diffraction efficiency of a Ni grating coated with a low-density carbon film, amorphous carbon (a-C), was also slightly improved to be 19.6 %. Furthermore, a distinct minimum of the zeroth order lights of the two carbon-coated Ni gratings were observed at around 6.76 nm, which is coincident with the maximum of the first order light.

Original languageEnglish
Title of host publicationProceedings of the 12th International Conference on Synchrotron Radiation Instrumentation, SRI 2015
EditorsOleg Chubar, Ignace Jarrige, Konstantine Kaznatcheev, Lisa Miller, Eli Stavitski, Toshiya Tanabe, Timur Shaftan, Qun Shen, Ronald Pindak, Christie Nelson, Sebastian Kalbfleisch, Juergen Thieme, Garth Williams, Martin Fuchs, Abdul Rumaiz, Jun Wang, Kenneth Evans-Lutterodt, Wah-Keat Lee, Sean McSweeney, Elio Vescovo
PublisherAmerican Institute of Physics Inc.
ISBN (Electronic)9780735413986
DOIs
Publication statusPublished - 2016 Jul 27
Event12th International Conference on Synchrotron Radiation Instrumentation, SRI 2015 - New York, United States
Duration: 2015 Jul 62015 Jul 10

Publication series

NameAIP Conference Proceedings
Volume1741
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

Other12th International Conference on Synchrotron Radiation Instrumentation, SRI 2015
CountryUnited States
CityNew York
Period15/7/615/7/10

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Imazono, T., Koike, M., Nagano, T., Sasai, H., Oue, Y., Kuramoto, S., Terauchi, M., Takahashi, H., Notoya, S., Murano, T., & Gullikson, E. M. (2016). Experimental evaluation of enhancement of diffraction efficiency by overcoating diamond-like carbon (DLC) on soft x-ray laminar-type gratings. In O. Chubar, I. Jarrige, K. Kaznatcheev, L. Miller, E. Stavitski, T. Tanabe, T. Shaftan, Q. Shen, R. Pindak, C. Nelson, S. Kalbfleisch, J. Thieme, G. Williams, M. Fuchs, A. Rumaiz, J. Wang, K. Evans-Lutterodt, W-K. Lee, S. McSweeney, & E. Vescovo (Eds.), Proceedings of the 12th International Conference on Synchrotron Radiation Instrumentation, SRI 2015 [040043] (AIP Conference Proceedings; Vol. 1741). American Institute of Physics Inc.. https://doi.org/10.1063/1.4952915