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X-ray monochromator with an energy resolution of 8×10–9 at 14.41 keV

Rev. Sci. Instrum. 72, 4080 (2001); doi:10.1063/1.1406925

Issue Date: November 2001

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Makina Yabashi
SPring-8/JASRI, Mikazuki, Hyogo 679-5198, Japan

Kenji Tamasaku
SPring-8/RIKEN, Mikazuki, Hyogo 679-5148, Japan

Seishi Kikuta
SPring-8/JASRI, Mikazuki, Hyogo 679-5198, Japan

Tetsuya Ishikawa
SPring-8/JASRI, Mikazuki, Hyogo 679-5198, Japan
SPring-8-RIKEN, Mikazuki, Hyogo 679-5148, Japan
An ultrahigh-resolution x-ray crystal monochromator providing a 120 µeV bandwidth at 14.41 keV is presented. The design, which uses four independent silicon crystals and has an output beam parallel to the incident beam, may be generalized to arbitrary energies. Fluxes of 1.3×106 photons/s (1.0×107 photons/s) in bandwidths of 120±15 µeV (140±15 µeV) were measured. The performance of the monochromator, including the preservation of coherence through it, was verified by measurement of a 9.6±2.0% enhancement in the coincidence rate (i.e., gamma(2)–1 = 0.096±0.020) in an intensity correlation experiment. ©2001 American Institute of Physics.
History: Received 30 March 2001; accepted 6 August 2001
Permalink: http://link.aip.org/link/?RSINAK/72/4080/1
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KEYWORDS and PACS

Keywords
PACS
  • 07.85.-m
    Instruments, apparatus, and components common to several branches of physics and astronomy X- and gamma-ray instruments
  • 61.10.Nz
    Structure of solids and liquids; crystallography X-ray diffraction and scattering Single-crystal and powder diffraction
  • YEAR: 2001

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ISSN:
0034-6748 (print)   1089-7623 (online)
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REFERENCES (28)
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