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Refractive index of silica aerogel: Uniformity and dispersion law

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Title: Refractive index of silica aerogel: Uniformity and dispersion law
Authors: Bellunato, T.1 tito.bellunato@mib.infn.it, Calvi, M.1,2, Matteuzzi, C.1, Musy, M.1, Perego, D.L.1, Storaci, B.3
Source: Nuclear Instruments & Methods in Physics Research Section A. Sep2008, Vol. 595 Issue 1, p183-186. 4p.
Subjects: Colloids, Silicon compounds, Engineering instruments, Optics
Abstract: Abstract: Two methods for the measurement of the uniformity of the refractive index within a single block of silica aerogel are described. One is based on the deflection of a laser beam induced by transverse index gradients. The second exploits the Cherenkov effect, measuring the emission angle of photons radiated by 500MeV electrons traversing the aerogel. The beam can scan the full aerogel surface providing information on point to point variations of . The measurement of the dispersion law is also reported. An Xe lamp coupled to a diffraction grating provides the monochromatic source. The index for each is measured by the prism method at a corner of an aerogel sample. A Sellmeier functional form for is assumed, and the parameters best fitting the experimental data are given. [Copyright &y& Elsevier]
Copyright of Nuclear Instruments & Methods in Physics Research Section A is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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Header DbId: egs
DbLabel: Engineering Source
An: 34464041
AccessLevel: 6
PubType: Academic Journal
PubTypeId: academicJournal
PreciseRelevancyScore: 0
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  Data: Refractive index of silica aerogel: Uniformity and dispersion law
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  Data: <searchLink fieldCode="AR" term="%22Bellunato%2C+T%2E%22">Bellunato, T.</searchLink><relatesTo>1</relatesTo><i> tito.bellunato@mib.infn.it</i><br /><searchLink fieldCode="AR" term="%22Calvi%2C+M%2E%22">Calvi, M.</searchLink><relatesTo>1,2</relatesTo><br /><searchLink fieldCode="AR" term="%22Matteuzzi%2C+C%2E%22">Matteuzzi, C.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Musy%2C+M%2E%22">Musy, M.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Perego%2C+D%2EL%2E%22">Perego, D.L.</searchLink><relatesTo>1</relatesTo><br /><searchLink fieldCode="AR" term="%22Storaci%2C+B%2E%22">Storaci, B.</searchLink><relatesTo>3</relatesTo>
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  Data: <searchLink fieldCode="JN" term="%22Nuclear+Instruments+%26+Methods+in+Physics+Research+Section+A%22">Nuclear Instruments & Methods in Physics Research Section A</searchLink>. Sep2008, Vol. 595 Issue 1, p183-186. 4p.
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  Data: <searchLink fieldCode="DE" term="%22Colloids%22">Colloids</searchLink><br /><searchLink fieldCode="DE" term="%22Silicon+compounds%22">Silicon compounds</searchLink><br /><searchLink fieldCode="DE" term="%22Engineering+instruments%22">Engineering instruments</searchLink><br /><searchLink fieldCode="DE" term="%22Optics%22">Optics</searchLink>
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  Data: Abstract: Two methods for the measurement of the uniformity of the refractive index within a single block of silica aerogel are described. One is based on the deflection of a laser beam induced by transverse index gradients. The second exploits the Cherenkov effect, measuring the emission angle of photons radiated by 500MeV electrons traversing the aerogel. The beam can scan the full aerogel surface providing information on point to point variations of . The measurement of the dispersion law is also reported. An Xe lamp coupled to a diffraction grating provides the monochromatic source. The index for each is measured by the prism method at a corner of an aerogel sample. A Sellmeier functional form for is assumed, and the parameters best fitting the experimental data are given. [Copyright &y& Elsevier]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of Nuclear Instruments & Methods in Physics Research Section A is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1016/j.nima.2008.07.072
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