\documentstyle[11pt,apsab]{article}
\nofiles
\MeetingID{DNP08}
%\DateSubmitted{20080701}
%\LogNumber{DNP08-2008-000468}
\SubmittingMemberSurname{Jones}
\SubmittingMemberGivenName{Richard}
%\SubmittingMemberID{60028219,USA}
\SubmittingMemberEmail{richard.t.jones@uconn.edu}
\SubmittingMemberAffil{University 
of Connecticut}
\PresentationType{oral}
\SortCategory{12.}{}{}{}
\received{01 
Jul 2008}
\begin{document}
\Title{Diagnostics of Deformation in Thin Diamonds 
for Coherent Bremsstrahlung 
Radiators}
\AuthorSurname{Jones}
\AuthorGivenName{Richard}
%\AuthorEmail{richard.t.jones@uconn.edu}
\AuthorSurname{Demas}
\AuthorGivenName{Matthew}
%\AuthorEmail{demas@phys.uconn.edu}
\AuthorSurname{Engsberg}
\AuthorGivenName{Alisa}
%\AuthorEmail{alisa.c.engsberg@gmail.com}
\AuthorAffil{University 
of 
Connecticut}
\AuthorSurname{Yang}
\AuthorGivenName{Guangliang}
%\AuthorEmail{y.guangliang@physics.gla.ac.uk}
\AuthorAffil{University 
of 
Glasgow}
\AuthorSurname{Collaboration}
\AuthorGivenName{GlueX}
\thanks{photon 
beam working group}
\CategoryType{E}
\begin{abstract}
The coherent 
bremsstrahlung beam line for Hall D at Jefferson Lab
requires diamond radiators as thin as possible to reduce the
effects of multiple scattering on the photon beam divergence.  At
thicknesses below 100 microns, stresses on the diamond, both from
the way the crystal is mounted and from internal defects, can
produce significant warping which degrades the coherent edge and
polarization of the beam.  The goal for Hall D is to use diamonds
of 20 microns thickness.  A 20 micron diamond from Element Six
was studied using X-ray diffraction at the Cornell CHESS
synchrotron facility.  The diamond showed a large amount of
warping across the entire face of the crystal.  Benchtop
measurements of surface curvature using a Michelson
interferometer are being explored that would provide immediate
feedback on crystal flatness and enable rapid studies of
different mounting techniques.
\end{abstract}
\end{document}

