skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Enhancement of diffraction efficiency of laminar-type diffraction gratings overcoated with diamond-like carbon (DLC) in soft x-ray region

Abstract

Boron is the critical trace element in the production of high quality steel, creating a great demand for an efficient detection method of the B-K emission band at around 6.76 nm. To meet this demand we made a simulation study and obtained a practical method to improve the diffraction efficiency of metal-coated laminar-type gratings for a grazing incidence flat-field spectrograph by overcoating a sufficiently transparent high-density material. In the simulation the diffraction efficiency in a spectral region of 3.5-8.5 nm was computed for several combinations of overcoating materials and coating metals, with various thicknesses of the overcoating layer. The result obtained are: (1) the best overcoating material is high-density diamond-like carbon (DLC) having a density of 3.1 g/cm{sup 3}, (2) its optimum thickness is 24 nm at an angle of incidence of 87.0°, and (3) with this thickness the first-order diffraction efficiency is expected to reach 29.7 %, which well exceeds 15.6 % for Ni-coated (or 14.1 % for Au-coated) grating.

Authors:
;  [1]; ; ; ; ;  [2];  [3];  [4]; ;  [5]
  1. Quantum Beam Science Center, Japan Atomic Energy Agency, 8-1-7 Umemidai, Kizugawa, Kyoto 619-0215 Japan (Japan)
  2. Device Dept., Shimadzu Corp., 1Nishinokyo-Kuwabara-cho, Nakagyo-ku, Kyoto 604-8511 Japan (Japan)
  3. Institute of Multidisciplinary Research for Advanced Materials, Tohoku University, 2-1-1 Katahira, Aoba-ku, Sendai 980-8577 Japan (Japan)
  4. Science Equipment Sales Dept., JEOL Ltd., 2-1-1 Ohtemachi, Chiyoda-ku, Tokyo 100-0004 Japan (Japan)
  5. SA Business Unit, JEOL Ltd., 3-1-2 Musashino, Akishima, Tokyo 196-8558 Japan (Japan)
Publication Date:
OSTI Identifier:
22608427
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1741; Journal Issue: 1; Conference: SRI2015: 12. international conference on synchrotron radiation instrumentation, New York, NY (United States), 6-10 Jul 2015; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY; BORON; DETECTION; DIAMONDS; DIFFRACTION; DIFFRACTION GRATINGS; EFFICIENCY; EMISSION; INCIDENCE ANGLE; LAYERS; METALS; SIMULATION; SOFT X RADIATION; STEELS; THICKNESS

Citation Formats

Koike, Masato, E-mail: koike.masato@jaea.go.jp, Imazono, Takashi, Nagano, Tetsuya, Sasai, Hiroyuki, Oue, Yuki, Yonezawa, Zeno, Kuramoto, Satoshi, Terauchi, Masami, Takahashi, Hideyuki, Notoya, Satoshi, and Murano, Takanori. Enhancement of diffraction efficiency of laminar-type diffraction gratings overcoated with diamond-like carbon (DLC) in soft x-ray region. United States: N. p., 2016. Web. doi:10.1063/1.4952917.
Koike, Masato, E-mail: koike.masato@jaea.go.jp, Imazono, Takashi, Nagano, Tetsuya, Sasai, Hiroyuki, Oue, Yuki, Yonezawa, Zeno, Kuramoto, Satoshi, Terauchi, Masami, Takahashi, Hideyuki, Notoya, Satoshi, & Murano, Takanori. Enhancement of diffraction efficiency of laminar-type diffraction gratings overcoated with diamond-like carbon (DLC) in soft x-ray region. United States. doi:10.1063/1.4952917.
Koike, Masato, E-mail: koike.masato@jaea.go.jp, Imazono, Takashi, Nagano, Tetsuya, Sasai, Hiroyuki, Oue, Yuki, Yonezawa, Zeno, Kuramoto, Satoshi, Terauchi, Masami, Takahashi, Hideyuki, Notoya, Satoshi, and Murano, Takanori. Wed . "Enhancement of diffraction efficiency of laminar-type diffraction gratings overcoated with diamond-like carbon (DLC) in soft x-ray region". United States. doi:10.1063/1.4952917.
@article{osti_22608427,
title = {Enhancement of diffraction efficiency of laminar-type diffraction gratings overcoated with diamond-like carbon (DLC) in soft x-ray region},
author = {Koike, Masato, E-mail: koike.masato@jaea.go.jp and Imazono, Takashi and Nagano, Tetsuya and Sasai, Hiroyuki and Oue, Yuki and Yonezawa, Zeno and Kuramoto, Satoshi and Terauchi, Masami and Takahashi, Hideyuki and Notoya, Satoshi and Murano, Takanori},
abstractNote = {Boron is the critical trace element in the production of high quality steel, creating a great demand for an efficient detection method of the B-K emission band at around 6.76 nm. To meet this demand we made a simulation study and obtained a practical method to improve the diffraction efficiency of metal-coated laminar-type gratings for a grazing incidence flat-field spectrograph by overcoating a sufficiently transparent high-density material. In the simulation the diffraction efficiency in a spectral region of 3.5-8.5 nm was computed for several combinations of overcoating materials and coating metals, with various thicknesses of the overcoating layer. The result obtained are: (1) the best overcoating material is high-density diamond-like carbon (DLC) having a density of 3.1 g/cm{sup 3}, (2) its optimum thickness is 24 nm at an angle of incidence of 87.0°, and (3) with this thickness the first-order diffraction efficiency is expected to reach 29.7 %, which well exceeds 15.6 % for Ni-coated (or 14.1 % for Au-coated) grating.},
doi = {10.1063/1.4952917},
journal = {AIP Conference Proceedings},
number = 1,
volume = 1741,
place = {United States},
year = {Wed Jul 27 00:00:00 EDT 2016},
month = {Wed Jul 27 00:00:00 EDT 2016}
}