Wide-band x-ray optics with a large angular aperture

Arkad'ev, V.A.; Kolomiitsev, A.I.; Kumakhov, M. A.; Ponomarev, I.Yu.; Khodeev, I.A.; Chertov, Yu.P.; Shakhparonov, I.M.

doi:10.3367/ufnr.0157.198903f.0529

Cited by 24 publications

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“…According to the estimation [2] the focal spot diameter is: One can see that general tendencies concerning focal spot forming and its energy and d1-dependence are in this case similar to the results of table 2.…”

Section: 39supporting

confidence: 71%

“…It is seen from the table 2 that focal spot sizes are essentially smaller than those predicted by(2). The geometry-dependence of exit and f is slight.One should notice that energy-dependence of the results is strong enough because the d -value , e. g., for case of lens 2 at E=1 keV is 12 mm and at spot E=8 keV -1.2 nun; so the real spot size (d .f) depends on energy strongly.…”

mentioning

confidence: 52%

“…For effectiveradiation passing through peripheral capillaries they should be filled in with radiation to a maximum extent [2]; the criteria of this is given by the following condition:…”

mentioning

confidence: 99%

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<title>Principal possibilities of Kumakhov lenses</title>

Arkadiev¹,

Gruev²

1994

SPIE Proceedings

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In the last ten years there appeared a new branch of x-ray optics which was named capillary optics. New optics widely uses the possibility of controlling x-rays during their transmission through systems of bent hollow glass capillaries. Main elements of new optics are concentrating devices which got the name "Kumakhov lenses" . Different types of Kumakhov lenses can be used for solving various problems: focusing radiation onto a small spot, forming quasiparallel beams, filtering radiation, reducing or increasing x-ray images etc. The possibility of controlling x-rays is based on the phenomenon of total external reflection which takes place only at grazing incidence angles. But Kumakhov lenses have large angular aperture because they operate on multiple reflect ions.In this work we investigate the properties of Kumakhov lenses operating on multiple reflections as well as more simple capillary systems which can also focus x-rays but operate mainly on single reflections. The latter systems are capillary structures which have straight hollow mutually parallel channels. Channels may be of different form, for example circular, square or hexagonal.Keywords: Kumakhov lens, x-ray beams, radiation focusing k. MULTIPLE REFLECTIONS SYSTEMS Proposed by M. A. Kuinakhov systems [ 1 , 2] based on the phenomenon of multiple total x-ray external reflection are called Kuinakhov lenses and use for x-ray beams transformation: divergent beam into quasiparallel beam -widening semilens (Fig.la); quasiparallel beam into convergent beam -narrowing semilens (Fig. ib); divergent beam into convergent beam -lens (Fig. ic).Some more intricate modifications of these devices are possible, e.g,such as three-sectional lens consisting of two semilenses with different curvature radii and a straight section smoothly connecting them in the middle (Fig. id). M.A.Kumakhov proposed also certain schemes of total external reflection for getting x-ray filters [3].Geometry of these devices (length L, focal distance F, minimum and maximum cross-section diameters D1 and D2 -see Fig.1) is mainly determined by 2 factors: by demands to the sizes and focal distance of a lens determined from experimental conditions and demands to the lens transmission, focal spot size and final beam angular divergence.The fulfillment of the second group of conditions can be obtained only in case if all lens capillaries (both central and peripheral) take part in beam forming. Because of the fact that peripheral capillaries turn radiation to larger angles (e.g., in case corresponding to Fig. ic this angle is 2'p) x-ray 200 / SPIE Vol. 2278 X-Ray and UV Detectors (1994) 0-8194-1602-9/94/$6.O0 Downloaded From: http://proceedings.spiedigitallibrary.org/ on 07/03/2016 Terms of Use: http://spiedigitallibrary.org/ss/TermsOfUse.aspx

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Section: 39supporting

confidence: 71%

mentioning

confidence: 52%

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<title>Principal possibilities of Kumakhov lenses</title>

Arkadiev¹,

Gruev²

1994

SPIE Proceedings

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“…The invention of polycapillary optics by Kumakhov was built on this work [7][8][9][10] and inspiration from ion channeling and channeling radiation [11]. A theoretical review of the potential for polycapillary optics and prototype testing was published in 1990 [12].…”

Section: Introductionmentioning

confidence: 99%

Focusing Polycapillary Optics and Their Applications

MacDonald

2010

X-Ray Optics and Instrumentation

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A summary of focusing X ray polycapillary optics is presented including history, theory, modeling, and applications development. The focusing effects of polycapillary optics come from the overlap of the beams from thousands of small hollow glass tubes. Modeling efforts accurately describe optics performance to allow for system development in a wide variety of geometries. The focusing of X ray beams with polycapillary optics yields high gains in intensity and increased spatial resolution for a variety of clinical, lab-based, synchrotron or in situ analysis applications.

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“…In the case when the capillary lens is located after the object a resolution of the object elements (2)(3) do, where do is capillary size. In our institute the experiment on obtaining the image with size of some microns was fi rst carried out .…”

Section: Transmission Of the X-ray Image With Magnification And Demagmentioning

confidence: 99%

<title>State and perspectives of capillary Roentgen optics</title>

Kumakhov¹

1994

SPIE Proceedings

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Wide-band x-ray optics with a large angular aperture

Cited by 24 publications

References 0 publications

<title>Principal possibilities of Kumakhov lenses</title>

<title>Principal possibilities of Kumakhov lenses</title>

Focusing Polycapillary Optics and Their Applications

<title>State and perspectives of capillary Roentgen optics</title>

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