# # arev:/usr/local/unicat/unireq/beamreq/req00064.txt # UNICAT Member Beam Time Request #64 # created Tue Jun 22 10:30:11 CDT 1999 # days: 6 description: We intend to learn how to image individual grains from a polycrstalline metal thin film. We have developed the Fourier inversion techniques necessary to invert coherent diffraction patterns into images. We expect these will be reliable enough to invert the diffraction from individual grains, which is in effect the shape transform. This will be part of our plan to sharpen our CXD analysis tools. The samples are evaporated thin films of Au on borosilicate glass, with a Cr buffer (improves adhesion). The films are 2000A thick to minimize the optical path length difference in order to match the coherence of the Si(111) monochromator. They will be annealed to adjust the grain size through Ostwald ripening. If progress is good we may be able to study the ripening in situ with a heater stage under the films. Otherwise this is planned for a later experiment. The samples are ready now. The experiment needs a diifractometer and OM software, either the Newport or Huber. It needs unfocussed monochromatic beam around 7 keV and our CCD detector. equipment+required: Newport or Huber goniometer and software. experiment: Imaging of grains of polycrystalline metals hazards: Normal hazards: excecution by Newport diffractometer, etc. name: Ian Robinson new+request: on nonmembers: John Pitney Mark Pfeifer Garth Williams (all UIUC physics students) station: 33ID-D unacceptable+dates: Strongly prefer end of run in September because of conflicts with Brookhaven. #QUERY_STRING: #REMOTE_HOST: lsx16h.nsls.bnl.gov #REMOTE_ADDR: 130.199.192.168 #CONTENT_LENGTH: 1615 #HTTP_REFERER: http://www.uni.aps.anl.gov/unireq.htm #HTTP_USER_AGENT: Mozilla/4.5 [en] (Win95; I)