Recent developments of high quality synthetic diamond single crystals for synchrotron X-ray monochromators

Linear parabolic diamond refractive lenses are presented, designed to withstand high thermal and radiation loads coming from upgraded accelerator X-ray sources. Lenses were manufactured by picosecond laser treatment of a high-quality single-crystal synthetic diamond. Twelve lenses with radius of curvature at parabola apex R = 200 µm, geometrical aperture A = 900 µm and length L = 1.5 mm were stacked as a compound refractive lens and tested at the ESRF ID06 beamline. A focal spot of size 2.2 µm and a gain of 20 were measured at 8 keV. The lens profile and surface quality were estimated by grating interferometry and X-ray radiography. In addition, the influence of X-ray glitches on the focusing properties of the compound refractive lens were studied.

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Characteristics of some inclusions contained in synthetic diamond single crystals

Materials Science and Engineering A ◽

10.1016/s0921-5093(00)01051-0 ◽

2000 ◽

Vol 293 (1-2) ◽

pp. 107-111 ◽

Cited By ~ 12

Author(s):

Long-Wei Yin ◽

Zeng-Da Zou ◽

Mu-Sen Li ◽

Yu-Xian Liu ◽

Jian-Jun Cui ◽

...

Keyword(s):

Single Crystals ◽

Synthetic Diamond ◽

Diamond Single Crystals

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Synchrotron X-Ray Topographic Study of Defects in High Quality, Flux Grown Ktiopo4 Single Crystals

MRS Proceedings ◽

10.1557/proc-307-243 ◽

1993 ◽

Vol 307 ◽

Author(s):

S. Wang ◽

M. Dudley ◽

L. K. Cheng ◽

J. D. Bierlein

Keyword(s):

Detailed Analysis ◽

Single Crystals ◽

Domain Walls ◽

Defect Structures ◽

Growth Sector ◽

High Quality ◽

X Ray ◽

Free Region ◽

Ferroelectric Domains ◽

Section Topography

ABSTRACTDefect structures in large, high quality flux-grown KTP single crystals have been studied by using synchrotron white beam X-ray topography. Growth dislocations, inclusions, growth sector boundaries, growth bands and surface micro-scratches were imaged. A number of planar defects in the dislocation-free region are imaged and determined to be inversion twin lamellae (lamellar ferroelectric domains) which have never been previously reported in KTP crystals. These inversion twin lamellae were also studied by section topography. Detailed analysis of observed contrast revealed that the domain walls bounding the lamellae are faulted with a fault vector of ½[0±1±1]. This fault vector seems to be consistent with the atomic structure of KTP. A detailed analysis is presented and discussed.

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Thermal expansion of synthetic diamond single crystals at low temperatures

Diamond and Related Materials ◽

10.1016/0925-9635(93)90238-w ◽

1993 ◽

Vol 2 (5-7) ◽

pp. 859-861 ◽

Cited By ~ 1

Author(s):

K. Haruna ◽

H. Maeta

Keyword(s):

Thermal Expansion ◽

Single Crystals ◽

Low Temperatures ◽

Synthetic Diamond ◽

Diamond Single Crystals

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STUDY OF COMPLEX Cu-O LATTICE IN La8-xSrxCu8O20 BY HIGH RESOLUTION X-RAY ABSORPTION SPECTROSCOPY

International Journal of Modern Physics B ◽

10.1142/s0217979200004180 ◽

2000 ◽

Vol 14 (29n31) ◽

pp. 3656-3661 ◽

Cited By ~ 2

Author(s):

N. L. SAINI ◽

A. LANZARA ◽

K. B. GARG ◽

A. BIANCONI ◽

T. ITO ◽

...

Keyword(s):

High Resolution ◽

Single Crystals ◽

Absorption Spectroscopy ◽

Local Structure ◽

Three Dimensional ◽

Xanes Spectroscopy ◽

High Quality ◽

X Ray ◽

X Ray Absorption

Cu K-edge XANES spectroscopy has been used to study local structure around the Cu-site in three-dimensional oxygen deficient perovkite La 8- x Sr x Cu 8 O 20 system. The combination of E//ab and E//c polarization and high resolution XANES spectra on high quality single crystals has allowed us to distinguish the various features associated with the complex Cu-O networks in the system which have then been compared with those of the La 2- x Sr x CuO 4 system.

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