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# Yong Chu <ychu@aps.anl.gov>
# requesting two weeks back to back days, at minimum=27 shifts (nine days of beamtime) days
# beamline 34ID-C, X-ray  Diffraction Microscopy Investigation on Surface Structure of RuO2.
# instrument 34ID-C coherent
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# top:/home/www/beamtime-requests/req00972.txt
# UNICAT Member Beam Time Request  #972
# created Tue Apr 25 12:14:34 CDT 2006
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apsrun:
	2006-02

beamline:
	34ID-C

collaboration:
	Yes

contact:
	ychu@aps.anl.gov

days:
	two weeks back to back

description:
	During the last experiment, we have demonstrated the microscopy capability for direction real-space measurement on the surface of RuO2 single crystals  with 60 nm resoltuion.  During this experiment, we would like to optimize the experimental setup and increase the measurement throughput.  In addition, we would like to make measurements on different types of cyrstals.    The experimental seupt is identical to coherent x-ray diffraction setup at 34-ID-C plus the use of objective optic (i.e. fresnel x-ray zone plate) that will be mounted on a two-theta arm of the Kappa diffractometer.  This experiment requires two weeks.  The first week will be used for experiemtal setup, alignment, optimization procedure for increasing throughput and can be carried out with parasitic operation.  The measurement in the second week require control of the x-ray energy and the use of on-axis beam.  The beam energy can be 8.5-10 keV, as long as it is allowed to remain constant throughout the measurement after the initial choice.   This works is carried out in collaboration with Christoph Rau.

equipment_required:
	

experiment:
	X-ray  Diffraction Microscopy Investigation on Surface Structure of RuO2.

foreign_nationals:
	

hazards:
	Sample:  RuO2 signle crystals (~mm in size),  SiC single crystal wafers, Diamond Single crystals (~mm in size) , InGaAs thin-film on GaAs wafer.   LN2-cooled CCD requires the use of a duewar.

instrument:
	34ID-C coherent

instrument_other:
	

minimumdays:
	27 shifts (nine days of beamtime)

name:
	Yong Chu

nonmembers:
	Yuncheng Zhong (APS, ANL), Hoydo You (MSD, ANL)

submit:
	Submit

unacceptable_dates:
	June 1-July 31.

z34ID_change_undulator:
	no

z34ID_details:
	The first week of investigation can be carried out under parasitic operation.  The second week  of investigation requires the control of beam energy (a single value from 8.5~10 keV, critical) and the use of on-axis beam (less critical).


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