Robust, high-resolution, indexed 3D slowness surfaces for Rayleigh-type waves on Lithium Niobate via parallelised Newtonian flow phase tracking

2021 ◽  
pp. 116533
Author(s):  
Harriet Grigg ◽  
Barry J. Gallacher ◽  
Nathan P. Craig
2007 ◽  
Vol 352 (1) ◽  
pp. 25-34 ◽  
Author(s):  
M. Bazzan ◽  
N. Argiolas ◽  
C. Sada ◽  
P. Mazzoldi ◽  
S. Grilli ◽  
...  

2012 ◽  
Vol 20 (1) ◽  
pp. 74-79 ◽  
Author(s):  
Thomas Gog ◽  
Diego M. Casa ◽  
Ayman H. Said ◽  
Mary H. Upton ◽  
Jungho Kim ◽  
...  

Resonant inelastic X-ray scattering (RIXS) experiments require special sets of near-backscattering spherical diced analyzers and high-resolution monochromators for every distinct absorption-edge energy and emission line. For the purpose of aiding the design and planning of efficient RIXS experiments, comprehensive lists of suitable analyzer reflections for silicon, germanium, α-quartz, sapphire and lithium niobate crystals were compiled for a multitude of absorption edges and emission lines. Analyzers made from lithium niobate, sapphire or α-quartz offer many choices of reflections with intrinsic resolutions currently unattainable from silicon or germanium. In some cases these materials offer higher intensities at comparable resolutions. While lithium niobate, sapphire or α-quartz analyzers are still in an early stage of development, the present compilation can serve as a computational basis for assessing expected and actual performance. With regard to high-resolution monochromators, bandpass and throughput calculations for combinations of double-crystal, high-heat-load and near-backscattering high-resolution channel-cuts were assembled. The compilation of these analyzer and monochromator data is publicly available on a website.


1994 ◽  
Vol 158 ◽  
pp. 151-154 ◽  
Author(s):  
R. S. Simon

The Naval Research Laboratory and the US Naval Observatory are building a phase tracking optical interferometer for high resolution imaging and astrometry. This instrument will be a six element interferometer capable of true imaging using interferometric amplitudes and closure phases. This talk will describe the instrument, with an emphasis on those aspects of the array related to high resolution imaging. The status of the project will be presented. First light is planned for October 1993, with 6 element imaging beginning in 1994.


2010 ◽  
Vol 43 (2) ◽  
pp. 276-279 ◽  
Author(s):  
Shuhua Yao ◽  
Xiaobo Hu ◽  
Tao Yan ◽  
Hong Liu ◽  
Jiyang Wang ◽  
...  

A near-stoichiometric lithium niobate single crystal has been grown by the Czochralski method in a hanging double crucible with a continuous powder supply system. Twins were found at one of the three characteristic growth ridges of the as-grown crystal. The twin structure was observed and analyzed by transmission synchrotron topography. The image shifts ΔXand ΔYin the transmission synchrotron topograph were calculated for the 3{\overline 2}{\overline 1}2 and 0\overline 222 reflections based on results from high-resolution X-ray diffractometry. It is confirmed that one of the {01{\overline 1}{\overline 2}}mplanes is the composition face of the twin and matrix crystals. The formation mechanism of these twins is discussed.


Sign in / Sign up

Export Citation Format

Share Document