Parabolic lithium refractive optics for x rays
dc.contributor.author | Pereira, N. R. | en_US |
dc.contributor.author | Dufresne, E. M. | en_US |
dc.contributor.author | Clarke, Roy | en_US |
dc.contributor.author | Arms, D. A. | en_US |
dc.date.accessioned | 2010-05-06T21:45:04Z | |
dc.date.available | 2010-05-06T21:45:04Z | |
dc.date.issued | 2004-01 | en_US |
dc.identifier.citation | Pereira, N. R.; Dufresne, E. M.; Clarke, R.; Arms, D. A. (2004). "Parabolic lithium refractive optics for x rays." Review of Scientific Instruments 75(1): 37-41. <http://hdl.handle.net/2027.42/70176> | en_US |
dc.identifier.uri | https://hdl.handle.net/2027.42/70176 | |
dc.description.abstract | Excellent x-ray optics for photons at around 10 keV can be expected with lithium metal. One of the best compound refractive lens designs [Lengeler et al., J. Appl. Phys. 84, 5855 (1998)] is now produced routinely in aluminum, and more recently has been demonstrated using beryllium [M. Kuhlmann et al. (unpublished)]. Here, we report a similar refractive lens made from lithium. At 10.87 keV, this lens has a ≃2 m focal length, more than 90% peak transmission, and an average transmission of 49%. The lens shows a very useful gain of up to 40. The full widths at half maximum (FWHM) of the focus are blurred by roughly 20 μm, resulting in a horizontal and vertical FWHM of 33 and 17 μm for an image distance of 2.13 m. The lens produces speckle on the x-ray beam, which is likely due to the inhomogeneities of the lens surface: Coherent x-ray scattering is useful in understanding imperfections in x-ray optics, such as mirrors and lenses. Better molding techniques should result in improved performance and enable microbeam techniques with this type of Li lens. © 2004 American Institute of Physics. | en_US |
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dc.publisher | The American Institute of Physics | en_US |
dc.rights | © The American Institute of Physics | en_US |
dc.title | Parabolic lithium refractive optics for x rays | en_US |
dc.type | Article | en_US |
dc.subject.hlbsecondlevel | Physics | en_US |
dc.subject.hlbtoplevel | Science | en_US |
dc.description.peerreviewed | Peer Reviewed | en_US |
dc.contributor.affiliationum | Department of Physics and MHATT-CAT, University of Michigan, Ann Arbor, Michigan 48109-1120 | en_US |
dc.contributor.affiliationother | Ecopulse Incorporated, P.O. Box 528, Springfield, Virginia 22150 | en_US |
dc.contributor.affiliationother | Advanced Photon Source and MHATT-CAT, Argonne, Illinois 60439 | en_US |
dc.description.bitstreamurl | http://deepblue.lib.umich.edu/bitstream/2027.42/70176/2/RSINAK-75-1-37-1.pdf | |
dc.identifier.doi | 10.1063/1.1633007 | en_US |
dc.identifier.source | Review of Scientific Instruments | en_US |
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dc.identifier.citedreference | Aachen’s website www.xray-lens.de has an excellent account of parabolic CRLs and an up to date series of papers. | en_US |
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dc.identifier.citedreference | http://www.mhatt.aps.anl.go/dohn/calculators/ gives the APS Undulator A beam properties. The machine currently runs with an horizontal emittance of 2.6 nm rad and a vertical coupling of 2.7%. The betatron parameters on the site are for a straight section. At 10.87 keV, the horizontal and vertical root-mean-square source sizes are, respectively, 203 and 19 μm. | en_US |
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dc.identifier.citedreference | The lower number is from the DABAX data base that is part of XOP (a well-known x-ray propagation code available at http://www.esrf.fr/computing/scientific/xop/), while the higher number is from LBL’s Center for X-Ray Optics’ website www-cxro.lbl.gov. | en_US |
dc.identifier.citedreference | E. M. Dufresne, T. S. Nurushev, S. B. Dierker, and R. Clarke, Phys. Rev. E PLEEE865, 061507 (2002). | en_US |
dc.identifier.citedreference | M. Krystian and W. Pichl, Mater. Charact. MACHEX46, 1 (2000). | en_US |
dc.identifier.citedreference | The x-ray properties of material properties are conveniently available on the web from Lawrence Berkeley Laboratory’s Center for X-ray Optics at www-cxro.lbl.gov. | en_US |
dc.owningcollname | Physics, Department of |
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