####################################################
# Brent J. Heuser <bheuser@uic.edu>
# requesting 4 days, at minimum=3 days
# beamline 34ID-C, Coherent x-ray diffraction of embedded hydride particles in Pd
# instrument 34ID-C coherent
####################################################
# top:/home/www/beamtime-requests/req01071.txt
# UNICAT Member Beam Time Request  #1071
# created Mon Dec 11 12:13:46 CST 2006
####################################################

apsrun:
	2007-01

beamline:
	34ID-C

collaboration:
	No

contact:
	bheuser@uic.edu

days:
	4

description:
	We are interested in the a direct measurement of lattice strain associated with a single hydride particle embedded in a Pd matrix with CXD.  In our most recent attempt at this experiment we successfully recorded the CXD pattern from several individual hydride particles in a polycrystalline Pd foil during in situ hydrogen gas exposure.  However, certain aspects of this sample (lack of an electropolished surface and the waviness of the foil) made it very difficult to align any of these individual hydride particles with the center of rotation of the diffractometer. 

We request beam time to investigate polycrystalline samples that have been electropolished.  We will mount these samples to polished Si wafers with vacuum epoxy to ensure that samples are flat.  We will repeat the in situ gas exposure procedures since these were successful during our last experimental run.

equipment_required:
	Turbo pump station

experiment:
	Coherent x-ray diffraction of embedded hydride particles in Pd

foreign_nationals:
	Kun Mo

hazards:
	We will perform in situ hydrogen gas exposure at room temperature with gas pressure less than 50 Torr in a volume less that 500 ml.  We have an environmental gas cell with a welded Be window that has the necessary gas and pumping ports.

instrument:
	34ID-C coherent

instrument_other:
	

minimumdays:
	3

name:
	Brent J. Heuser

nonmembers:
	

submit:
	Submit

unacceptable_dates:
	

z34ID_change_undulator:
	no

z34ID_details:
	

z34ID_parasitic:
	yes


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