Journal Article

FZJ-2016-02154

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Single-crystal sapphire microstructure for high-resolution synchrotron X-ray monochromators

Asadchikov, V. E. ; Butashin, A. V. ; Buzmakov, A. V. ; Deryabin, A. N. ; Kanevsky, V. M. ; Prokhorov, I. A. ; Roshchin, B. S. ; Volkov, Y. O. ; Zolotov, D. A. ; Jafari, A.FZJ* ; Alexeev, P.FZJ* ; Cecilia, A. ; Baumbach, T. ; Bessas, D. ; Danilewsky, A. N. ; Sergueev, I. ; Wille, H.-C. ; Hermann, R. (Corresponding author)FZJ*

2016
Wiley-VCH Weinheim

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Please use a persistent id in citations: doi:10.1002/crat.201500343

Abstract: We report on the growth and characterization of sapphire single crystals for X-ray optics applications. Structural defects were studied by means of laboratory double-crystal X-ray diffractometry and white-beam synchrotron-radiation topography. The investigations confirmed that the main defect types are dislocations. The best quality crystal was grown using the Kyropoulos technique. Therein the dislocation density was 102–103 cm−2 and a small area with approximately 2*2 mm2 did not show dislocation contrast in many reflections. This crystal has suitable quality for application as a backscattering monochromator. A clear correlation between growth rate and dislocation density is observed, though growth rate is not the only parameter impacting the quality.

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Contributing Institute(s):

1. Streumethoden (JCNS-2)
2. Streumethoden (PGI-4)
3. JARA-FIT (JARA-FIT)

Research Program(s):

1. 144 - Controlling Collective States (POF3-144) (POF3-144)
2. 524 - Controlling Collective States (POF3-524) (POF3-524)
3. 6212 - Quantum Condensed Matter: Magnetism, Superconductivity (POF3-621) (POF3-621)
4. 6213 - Materials and Processes for Energy and Transport Technologies (POF3-621) (POF3-621)
5. 6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623) (POF3-623)

Appears in the scientific report 2016

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Database coverage:
Current Contents - Physical, Chemical and Earth Sciences ; IF < 5 ; JCR ; Nationallizenz ; No Authors Fulltext ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Thomson Reuters Master Journal List ; Web of Science Core Collection

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