Development of diffraction gratings coated with diamond like carbon (DLC)-based multilayer for high sensitivity detection of K emission of boron

Koike, Masato; Imazono, Takashi; Koeda, Masaru*; Nagano, Tetsuya*; Sasai, Hiroyuki*; Oue, Yuki*; Kuramoto, Satoshi*; Terauchi, Masami*; Takahashi, Hideyuki*; Notoya, Satoshi*; Murano, Takanori*

An addition of small amount of boron to steal materials is known well that a it causes a big influence on the characteristic of steel materials, for example, an internal structure and intensity (hardness, toughness), corrosion resistance, heat resistance, and magnetic property. Although the nuclear steel which added boron attracted attention from half century ago, the research on boron steel serves as serious concerns from the standpoints to saving resources and a weight saving in the materials science field as a thin board steel plate used for vehicles etc. recently focusing on the industrial world. However, as compared with the element of others the amount of boron is remarkably small, generally 5-30 ppm, an understanding about the action of boron is not fully understood. To contribute to the X ray emission-spectrochemical-analysis research in the B-K luminescence line (wavelength: 6.76 nm, energy: 183.3 eV) neighborhood, high diffraction efficiency laminar-type diffraction gratings with multilayer film containing diamond-like carbon (DLC) system on the surface newly is under development, and, here, we report the newly designed gratings.