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SUMMARY:THE CRL'S OPTICAL PROPERTIES  OF BERYLLIUM GRADES IS-50M AND O-30-
 H
DTSTART;VALUE=DATE-TIME:20160705T090000Z
DTEND;VALUE=DATE-TIME:20160705T100000Z
DTSTAMP;VALUE=DATE-TIME:20260513T161901Z
UID:indico-contribution-1158@indico.inp.nsk.su
DESCRIPTION:Speakers: Ivan Lyatun (X-Ray Coherent Optics Laboratory (IKBFU
 ))\nX-ray refractive lenses [1-3] are widely used as beam transport and  b
 eam conditioning optics at the new generation synchrotron radiation source
 s. In order to extend their use for microscopy applications the    signifi
 cant improvements of the optical properties in terms of shape    quality a
 nd bulk homogeneity are needed. It turned out that    beryllium\, as a low
 -Z element\, is the most suitable for lens manufacturing. However\, beryll
 ium being a sintered material has an   internal grain structure with a rel
 atively high content of the beryllium oxide\, which create a strong small-
  and ultra-small angular    scattering.\n   In this work we report results
  of study of different types of beryllium (Materion Brush and Russian ROSA
 TOM grades) using small angle scattering and phase contrast imaging techni
 ques. It was shown that Be with a reduced oxygen content is preferable for
  microbeam applications. As for the full-field microscopy\, Be with small 
 grain sizes is required. In this view a so-called “nano-beyllium” with
  grain sizes smaller than 50 nm is very promising for lens manufactuiring.
 \n\nReferences\n\n 1. Snigirev\,A.\,Kohn\,V.\,Snigireva\,I. & Lengeler B. 
 (1996). Nature\, 384\, 49-51.\n 2. A. Snigirev\, V. Kohn\, I. Snigireva an
 d etc.\, "Focusing High-Energy X-Rays by Compound Refractive Lenses\," App
 l. Opt. 37\, 653-662 (1998)\n 3. A. Snigirev\, I. Snigireva\, “Hard X-ra
 y Microoptics”\, Springer Series in Optical Sciences vol. 137\, 255-285\
 , 2008\n\nhttps://indico.inp.nsk.su/event/3/contributions/1158/
LOCATION:Budker INP 2nd and 3rd floors
URL:https://indico.inp.nsk.su/event/3/contributions/1158/
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