#
# arev:/usr/local/unicat/unireq/beamreq/req00150.txt
# UNICAT Member Beam Time Request  #150

# created Fri Dec 15 08:15:22 CST 2000
#

collaboration:
	Yes

collaborator+Pete:
	on

contact:
	andrew.allen@nist.gov

days:
	2

description:
	(I) We wish to test the issue of whether D2O substitution in cement affects the microstructure. This is one of the underlying assumptions of contrast variation methods in SANS analysis but comes into question when the degree of hydrogen bonding becomes important.
	(2) We wish to continue our studies of the porous defect structures in sintered nanocrystalline alumina compacts. This issue is important for optimizing the transparency of thin alumina coatings as used in fluorescent lighting etc.
	(3) We would like to test with standard USAXS conditions candidate ceramic coating materials to be tried initially in our development of near-surface USAXS studies of thin coatings on substrates. (This requires the anisotropic USAXS configuration and is being requested for later in the cycle).

equipment+required:
	Standard USAXS configuration

experiment:
	Structural studies of D2O in cements and defects in ceramics

foreign+nationals:
	Sujarinee Kochwatanna (second visit)

hazards:
	None

name:
	Andrew Allen

nonmembers:
	Jeff Thomas for (1)
	Sujarinee Kochwatanna for (2)

station:
	33ID-D

unacceptable+dates:
	January 21 - February 10th
	We request this time early in the cycle (say January 17-19) in order to evaluate the results from (3) above prior to returning for the anisotropic USAXS experiment requested at the end of the schedule period.



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