Performance of the post-focusing mirror system at the reflectometry beamline BL-11D of the Photon Factory

Hatano, Tadashi; Aihara, S.; Uchida, Katsuya; Tsuru, Tomoko

doi:10.1088/1742-6596/463/1/012010

Cited by 6 publications

(3 citation statements)

References 4 publications

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“…The diffraction efficiency of the 2400 lines/mm grating was measured by using the soft x-ray reflectometer installed at the BL-11D beamline of the Photon Factory (PF) in Japan. [24][25][26] Figure 3(a) indicates a schematic diagram of the measurement arrangement. The grating was located at the center of the reflectometer chamber.…”

Section: B Measurement Of the Gating Efficiencymentioning

confidence: 99%

“…The grating was located at the center of the reflectometer chamber. A divergent angle less than 0.1 • and a FWHM diameter of approximately 200 µm at the focal point of the incident beam were measured by a knife-edge scan as described by Hatano et al 25 The diffraction efficiency was derived as the ratio between the incident and diffracted powers. To determine this ratio, the angular profiles of the incident and diffracted beam were scanned by a detector, which consisted of an x-ray photo-diode and a slit with a width of 100 µm.…”

Section: B Measurement Of the Gating Efficiencymentioning

confidence: 99%

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Evaluation of a flat-field grazing incidence spectrometer for highly charged ion plasma emission in soft x-ray spectral region from 1 to 10 nm

Dinh

Kondo

Tamura

et al. 2016

Review of Scientific Instruments

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A flat-field grazing incidence spectrometer operating on the spectral region from 1 to 10 nm was built for research on physics of high temperature and high energy density plasmas. It consists of a flat-field grating with 2400 lines/mm as a dispersing element and an x-ray charged coupled device (CCD) camera as the detector. The diffraction efficiency of the grating and the sensitivity of the CCD camera were directly measured by use of synchrotron radiation at the BL-11D beamline of the Photon Factory (PF). The influence of contamination to the spectrometer also was characterized. This result enables us to evaluate the absolute number of photons in a wide range wavelength between 1 and 10 nm within an acquisition. We obtained absolutely calibrated spectra from highly charged ion plasmas of Gd, from which a maximum energy conversion efficiency of 0.26% was observed at a Nd:YAG laser intensity of 3 × 10 W/cm.

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Section: B Measurement Of the Gating Efficiencymentioning

confidence: 99%

Section: B Measurement Of the Gating Efficiencymentioning

confidence: 99%

Evaluation of a flat-field grazing incidence spectrometer for highly charged ion plasma emission in soft x-ray spectral region from 1 to 10 nm

Dinh

Kondo

Tamura

et al. 2016

Review of Scientific Instruments

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“…We utilized the synchrotron radiation from one branch of the beamline BL-11D of the photon factory (PF). 19) For the 10 mm distance, the widths of Slit1 and Slit2 were set to 25 μm, which is narrower than the width used in for the 142 mm distance, and hence good light coherence was expected in this case. The CCD used for the measurement at this distance has 512 × 512 pixels and 24 μm native pixel size (C4880-21-26WD, Hamamatsu Photonics).…”

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confidence: 99%

Quasicrystal hole array as X-ray focusing optical element

Hoshino¹,

Fukamizu²,

Aoki³

et al. 2020

Appl. Phys. Express

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Quasicrystal hole arrays are expected to be adopted as new focusing optical elements, owing to the characteristic self-imaging effect and the possibility of overcoming the diffraction limit. Using one such element, we achieved soft X-ray focusing. We designed a fivefold symmetric quasicrystal based on a Penrose tiling pattern consisting of 301 1.5 μm diameter holes. The light source was 10 nm synchrotron radiation. The observed diffraction pattern agreed well with the results of Fraunhofer-approximation simulations. Furthermore, the focal spot size was estimated by direct CCD imaging and found to be sufficiently small, in line with simulation results.

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