Constant-pitch microprism-array optical device for beam condensers in hard x-ray synchrotron radiation beamlines

Y. Kagoshima, H. Takano, S. Takeda

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

A constant-pitch microprism-array optical device has been developed. It is a modified version of the previously reported quasi-Fresnel lens [Kagoshima, Appl. Phys. Lett. 101, 163102 (2012)]. The modification eases the fabrication of the lens, although it degrades some of the focusing performance. It consists of twenty 50-μm-wide right-angle microprisms, whose slope angles gradually increase to 67.8° at the outer side. By inclining the array, the aspect ratio of the microprisms becomes large enough for X-ray use. The effective slope angle can be enlarged to 86.4° at an inclination angle of 80.5°. A 10-keV synchrotron beam with a size of 680 μm (V) × 660 μm (H) was two-dimensionally condensed to 130 μm (V) × 380 μm (H) with a photon flux density gain of ∼3. We also show that the microprism array is suitable for practical use below the critical radiation dose rate.

Original languageEnglish
Article number214314
JournalJournal of Applied Physics
Volume113
Issue number21
DOIs
Publication statusPublished - 2013 Jun 7
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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