Coherent hard x-ray focusing optics and applications

Journal Article · Wed Jan 01 00:00:00 EST 1992 · Review of Scientific Instruments; (United States)

DOI:https://doi.org/10.1063/1.1142711· OSTI ID:5569357

Yun, W B; Viccaro, P J; Lai, B; Chrzas, J ^[1]

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1. Argonne National Laboratory, Advanced Photon Source, 9700 South Cass Avenue, Argonne, Illinois 60439 (United States)

Coherent hard x-ray beams with a flux exceeding 10{sup 9} photons/sec with a bandwidth of 0.1% will be provided by undulators at the third-generation synchrotron radiation sources such as APS, ESRF, and Spring-8. The availability of such high flux coherent x-ray beams offers excellent opportunities for extending the coherence-based techniques developed in the visible and soft x-ray part of the electromagnetic spectrum to the hard x-ray region. These x-ray techniques (e.g., diffraction-limited microfocusing, holography, interferometry, phase contrast imaging, and signal enhancement) may offer substantial advantages over noncoherence-based x-ray techniques currently used. For example, the signal-enhancement technique may be used to enhance an anomalous x-ray or magnetic x-ray scattering signal by several orders of magnitude. Coherent x rays can be focused to a very small (diffraction-limited) spot size, thus allowing construction of high spatial resolution microprobes. This paper will discuss the feasibility of extending some coherence-based techniques to the hard x-ray range and the significant progress that has been made in the development of diffraction-limited focusing optics. Specific experimental results for a transmission Fresnel phase zone plate that can focus 8.2 keV x rays to a spot size of about 2 microns will be briefly discussed. The comparison of measured focusing efficiency of the zone plate with that calculated will be made. Some specific applications of zone plates as coherent x-ray optics will be discussed.

• DOE Contract Number: W-31-109-ENG-38
• OSTI ID: 5569357
• Journal Information: Review of Scientific Instruments; (United States), Vol. 63:1; ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
47 OTHER INSTRUMENTATION
HARD X RADIATION
FOCUSING
SYNCHROTRON RADIATION
ANL
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SYNCHROTRON RADIATION SOURCES
WIGGLER MAGNETS
BREMSSTRAHLUNG
ELECTRICAL EQUIPMENT
ELECTROMAGNETIC RADIATION
ELECTROMAGNETS
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IONIZING RADIATIONS
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US DOE
US ERDA
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X RADIATION
430303* - Particle Accelerators- Experimental Facilities & Equipment
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