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SUMMARY:“In situ diffraction at extreme conditions” end-station at SKI
 F
DTSTART;VALUE=DATE-TIME:20200713T134000Z
DTEND;VALUE=DATE-TIME:20200713T134100Z
DTSTAMP;VALUE=DATE-TIME:20260513T163039Z
UID:indico-contribution-1840@indico.inp.nsk.su
DESCRIPTION:Speakers: Sergey Rashchenko (Sobolev Institute of Geology and 
 Mineralogy\, SB RAS)\nThe “Microfocus” beamline of SKIF storage ring i
 s a multi-branch undulator beamline to be commissioned in 2024. The “in 
 situ diffraction at extreme conditions” end-station  is designed for X-r
 ay diffraction  (powder\, single crystal\, and multi-grain techniques) and
  total X-ray scattering from samples under high-pressure conditions (up to
  several million atmospheres) combined with high (up to 6000 K) and cryoge
 nic temperatures. Extreme conditions will be achieved using diamond anvils
  cells (DACs) of various designs\, as well as compact toroid (Paris-Edinbu
 rgh) presses. The end-station offers beam parameters suitable for solving 
 the most demanding user tasks in the fields of Earth and planetary science
 s\, materials science\, physics and chemistry of the extreme state of matt
 er etc.\n\nThe section will use radiation of the 15th harmonic of supercon
 ducting undulator (resonance energy of 30.9 keV)\, with source dimensions 
 (r.m.s.) of 9×8 μm\, divergence of 16×13 mrad\, and  integrated flux of
  about 2×10^13 phot/s/0.1% b.w.\nThe “in situ diffraction at extreme co
 nditions” end-station will consist of two experimental setups: a laser h
 eating (LH) and general purpose (GP)\, where experiments can be carried ou
 t using DACs with resistive heating or cryogenic cooling\, toroid press\, 
 etc.\n\nTo reach the smallest beam focus\, a compound refractive lens (CRL
 ) with ~1 m focal length will be placed in front of the sample\, collectin
 g a 10^10 phot/s flux into a 0.3×0.3 μm (FWHM) spot.   A moderate focus 
 mode using a pre-focusing CRL located in an optical hutch near the diamond
  monochromator will be also available. Using the pre-focusing CRL \, almos
 t the entire photon flux transmitted by the monochromator can be transport
 ed to the aperture of the focusing CRL. This configuration provide focusin
 g of larger flux (10^11 phot/s) into a 1.6×1.4 μm spot (FWHM). The flux 
 density in both modes is about 1011 ph/s/μm2\, allowing the proposed sche
 me to compete with capabilities of similar beamlines of main world synchro
 tron facilities both in the tight focusing\, and in flux density.\n\nThe r
 eported study was funded by RFBR according to the research project #18-35-
 20047.\n\nhttps://indico.inp.nsk.su/event/24/contributions/1840/
LOCATION:
URL:https://indico.inp.nsk.su/event/24/contributions/1840/
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