#################################################### # John Budai # requesting 3 days, at minimum=2 days # beamline 34ID-E, Microstructure and light transport in nanowhiskers # instrument 34ID-E microbeam #################################################### # top:/home/www/beamtime-requests/req01226.txt # UNICAT Member Beam Time Request #1226 # created Fri May 02 16:54:17 CDT 2008 #################################################### apsrun: 2008-02 beamline: 34ID-E collaboration: No collaborator_Wenjun: ON contact: budaijd@ornl.gov days: 3 description: We will study the local lattice structure, defects and light transport in Eu-Al-O nanowhiskers. Samples (from Zhengwei Pan, U of GA) will consist of three classes of whiskers with different lattice structures and luminescence colors (yellow, green and blue). The x-ray microbeam will be used both to probe the local structure and to generate luminescence at particular locations inside these small light pipes. Preliminary measurements have shown: 1) Some whiskers possess lattice structures (and complex defect superstructures) which are not found in previous papers or databases, and 2) local defects (e.g. grain boundaries or neck-down regions) directly affect the light transport properties. We will determine the local lattice and defect structures, and correlate these microstructural features with light transport observations. equipment_required: experiment: Microstructure and light transport in nanowhiskers foreign_nationals: hazards: none instrument: 34ID-E microbeam instrument_other: minimumdays: 2 name: John Budai new_request: ON nonmembers: submit: Submit unacceptable_dates: July 19 to August 8, 2008 z34ID_change_undulator: yes z34ID_details: These experiments on 34ID-E may require changing the undulator gap continuously during some scans. z34ID_on_axis: no z34ID_parasitic: no z34ID_taper: no #REMOTE_HOST: jdbmbp.ornl.gov #REMOTE_ADDR: 160.91.156.174 #CONTENT_LENGTH: 1438 #HTTP_REFERER: http://www.uni.aps.anl.gov/admin/unireq.html #HTTP_USER_AGENT: Mozilla/5.0 (Macintosh; U; Intel Mac OS X; en-US; rv:1.8.1.14) Gecko/20080404 Firefox/2.0.0.14