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Title: CLESSIDRA: Focusing Hard X-Rays Efficiently with Arrays Composed of Small Prisms

Abstract

Small prisms arranged such that the number of prisms to traverse by an x-ray beam is linearly increasing with distance from the symmetry axis of the device will direct an incident wave to a common cross over point. This structure can be understood as a special form of the Fresnel version of a concave refractive x-ray lens. Indeed it is obtained by removing blocks of optically passive material of equal height from the concave lens shape. It will be shown that the structure has a high refraction efficiency and that the losses are produced by problems in the fabrication of sufficiently sharp tips for the prisms.

Authors:
; ; ; ;  [1];  [2]
  1. Sincrotrone Trieste S. c. p. A., S.S. 14 km 163.5, I-34012 Basovizza (Italy)
  2. ICTP, Strada Constiera 11, I-34014 Trieste (Italy)
Publication Date:
OSTI Identifier:
21052636
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 879; Journal Issue: 1; Conference: 9. international conference on synchrotron radiation instrumentation, Daegu (Korea, Republic of), 28 May - 2 Jun 2006; Other Information: DOI: 10.1063/1.2436180; (c) 2007 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
43 PARTICLE ACCELERATORS; BEAM OPTICS; BEAM PRODUCTION; DISTANCE; EFFICIENCY; FABRICATION; FOCUSING; HARD X RADIATION; LENSES; PHOTON BEAMS; PRISMS; REFRACTION; SYMMETRY

Citation Formats

Jark, Werner, Perennes, Frederic, Matteucci, Marco, Mancini, Lucia, Menk, Ralf H., and Rigon, Luigi. CLESSIDRA: Focusing Hard X-Rays Efficiently with Arrays Composed of Small Prisms. United States: N. p., 2007. Web. doi:10.1063/1.2436180.
Jark, Werner, Perennes, Frederic, Matteucci, Marco, Mancini, Lucia, Menk, Ralf H., & Rigon, Luigi. CLESSIDRA: Focusing Hard X-Rays Efficiently with Arrays Composed of Small Prisms. United States. doi:10.1063/1.2436180.
Jark, Werner, Perennes, Frederic, Matteucci, Marco, Mancini, Lucia, Menk, Ralf H., and Rigon, Luigi. Fri . "CLESSIDRA: Focusing Hard X-Rays Efficiently with Arrays Composed of Small Prisms". United States. doi:10.1063/1.2436180.
@article{osti_21052636,
title = {CLESSIDRA: Focusing Hard X-Rays Efficiently with Arrays Composed of Small Prisms},
author = {Jark, Werner and Perennes, Frederic and Matteucci, Marco and Mancini, Lucia and Menk, Ralf H. and Rigon, Luigi},
abstractNote = {Small prisms arranged such that the number of prisms to traverse by an x-ray beam is linearly increasing with distance from the symmetry axis of the device will direct an incident wave to a common cross over point. This structure can be understood as a special form of the Fresnel version of a concave refractive x-ray lens. Indeed it is obtained by removing blocks of optically passive material of equal height from the concave lens shape. It will be shown that the structure has a high refraction efficiency and that the losses are produced by problems in the fabrication of sufficiently sharp tips for the prisms.},
doi = {10.1063/1.2436180},
journal = {AIP Conference Proceedings},
number = 1,
volume = 879,
place = {United States},
year = {Fri Jan 19 00:00:00 EST 2007},
month = {Fri Jan 19 00:00:00 EST 2007}
}
  • In response to the conjecture that the numerical aperture of x-ray optics is fundamentally limited by the critical angle of total reflection, the concept of adiabatically focusing refractive lenses was proposed to overcome this limit. Here, we present an experimental realization of these optics made of silicon and demonstrate that they indeed focus 20 keV x rays to a 18.4 nm focus with a numerical aperture of 1.73(9) × 10 –3 that clearly exceeds the critical angle of total reflection of 1.55 mrad.
  • No abstract prepared.
  • We have fabricated partial Multilayer Laue Lens (MLL) linear zone plate structures with thousands of alternating WSi{sub 2} and Si layers and various outermost zone widths according to the Fresnel zone plate formula. Using partial MLL structures, we were able to focus hard X-rays to line foci with a width of 30 nm and below. Here, we describe challenges and approaches used to bond these multilayers to achieve line and point focusing. Bonding was done by coating two multilayers with AuSn and heating in a vacuum oven at 280-300 C. X-ray reflectivity measurements confirmed that there was no change inmore » the multilayers after heating to 350 C. A bonded MLL was polished to a 5-25 {micro}m wedge without cracking. SEM image analyses found well-positioned multilayers after bonding. These results demonstrate the feasibility of a bonded full MLL for focusing hard X-rays.« less
  • We report improved results for hard x-ray focusing using a multilayer Laue lens (MLL). We have measured a line focus of 16 nm width with an efficiency of 31% at a wavelength {lambda} = 0.064 nm (19.5 keV) using a partial MLL structure with an outermost zone width of 5 nm. The results are in good agreement with the theoretically predicted performance.