Higher-harmonics suppressor for soft x rays

I. Waki; Y. Hirai; A. Momose; K. Hayakawa

doi:10.1063/1.1140829

Higher-harmonics suppressor for soft x rays

I. Waki, Y. Hirai, A. Momose, K. Hayakawa

IMRAM - Division of Measurements

Hitachi, Ltd.

Research output: Contribution to journal › Article › peer-review

31 Citations (Scopus)

Abstract

We have developed an apparatus for suppressing higher harmonics contained in the soft x-ray output beam of grazing-incidence grating monochromators. It consists of eight pairs of total-reflection mirrors. Each pair serves as a low-pass filter with the cutoff energy different from one another. The eight pairs are designed to cover an energy range of 80-1600 eV with an efficiency of harmonic suppression better than 97%, while transmitting more than 50% of the fundamental photons. We have tested its preliminary performance on the soft x-ray beamline BL-8A at the Photon Factory. We present the observed transmission efficiencies and the effects of the harmonic suppressor on measurements of reflectivity and fluorescence spectra.

Original language	English
Pages (from-to)	2072-2075
Number of pages	4
Journal	Review of Scientific Instruments
Volume	60
Issue number	7
DOIs	https://doi.org/10.1063/1.1140829
Publication status	Published - 1989

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AU - Waki, I.

AU - Hirai, Y.

AU - Momose, A.

AU - Hayakawa, K.

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N2 - We have developed an apparatus for suppressing higher harmonics contained in the soft x-ray output beam of grazing-incidence grating monochromators. It consists of eight pairs of total-reflection mirrors. Each pair serves as a low-pass filter with the cutoff energy different from one another. The eight pairs are designed to cover an energy range of 80-1600 eV with an efficiency of harmonic suppression better than 97%, while transmitting more than 50% of the fundamental photons. We have tested its preliminary performance on the soft x-ray beamline BL-8A at the Photon Factory. We present the observed transmission efficiencies and the effects of the harmonic suppressor on measurements of reflectivity and fluorescence spectra.

AB - We have developed an apparatus for suppressing higher harmonics contained in the soft x-ray output beam of grazing-incidence grating monochromators. It consists of eight pairs of total-reflection mirrors. Each pair serves as a low-pass filter with the cutoff energy different from one another. The eight pairs are designed to cover an energy range of 80-1600 eV with an efficiency of harmonic suppression better than 97%, while transmitting more than 50% of the fundamental photons. We have tested its preliminary performance on the soft x-ray beamline BL-8A at the Photon Factory. We present the observed transmission efficiencies and the effects of the harmonic suppressor on measurements of reflectivity and fluorescence spectra.

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Higher-harmonics suppressor for soft x rays

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