Higher-harmonics suppressor for soft x rays

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

Research output: Contribution to journalArticlepeer-review

31 Citations (Scopus)


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 languageEnglish
Pages (from-to)2072-2075
Number of pages4
JournalReview of Scientific Instruments
Issue number7
Publication statusPublished - 1989


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