Zobrazeno 1 - 10
of 100
pro vyhledávání: '"Enrico Massa"'
Autor:
Enrico Massa
Publikováno v:
Physics, Vol 6, Iss 2, Pp 845-858 (2024)
The International System of Units (SI), the current form of the metric system and the world’s most used system of units, has been continuously updated and refined since the Metre Convention of 1875 to ensure that it remains up to date with the late
Externí odkaz:
https://doaj.org/article/f7de55a86e5c4171bf7d237b656fa97e
Publikováno v:
New Journal of Physics, Vol 15, Iss 6, p 063013 (2013)
At optical frequencies metals behave as an electron plasma and conventional antenna designs need modifications when transferred to this regime. In contrast to antenna theory and to the effective wavelength picture, the position and width of the dipol
Externí odkaz:
https://doaj.org/article/a0b390d2bf574fcd9d11a60b8e97df1b
Publikováno v:
MAPAN. 35:511-519
X-ray interferometry established a link between atomic and macroscopic realisations of the metre. The possibility of measuring the silicon lattice parameter in terms of optical wavelengths opened the way to count atoms, to determine the Avogadro cons
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cf2807a30435116c292c4f46b4cc7478
https://doi.org/10.1007/s12647-020-00409-x
https://doi.org/10.1007/s12647-020-00409-x
The observation of neutron interference by using a crystal interferometer having a separate analyser opens the way to the construction and operation of interferometers with vast arm separation and length. Setting the design specifications requires a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8fc6c2bf4143b716ab1cbca87688348c
Publikováno v:
Journal of Applied Crystallography
This paper investigates both analytically and experimentally the effect of the defocus (the difference between the splitter-to-mirror and analyser-to-mirror distances) on the phase of the travelling fringes in a separate-crystal triple-Laue X-ray int
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1a5579d3b9861692ec0ad08bbabbc61a
https://pubmed.ncbi.nlm.nih.gov/34667449
https://pubmed.ncbi.nlm.nih.gov/34667449
The measurement of the Si lattice parameter by X-ray interferometry assumes the use of strain-free crystals, which might not be true because of intrinsic stresses due to surface relaxation, reconstruction and oxidation. X-ray phase-contrast topograph
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0b9125719fdb50c1ce29b136670deba4
http://arxiv.org/abs/2004.11275
http://arxiv.org/abs/2004.11275
The paper deals with the impact of wavefront errors, due to the optical aberrations of a two-beam interferometer, on the period of the travelling fringe observed by integrating the interference pattern. A Monte Carlo simulation of the interferometer
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ac5b27c3532727076e5ac4a7e997a1e4
Publikováno v:
Optics express. 27(24)
Two-beam interferometry is a tool of high-precision length-metrology, where displacements are measured to within sub-nanometer resolution and accuracy. Differential wavefront sensing – via phase detection by segmented photodiodes – adds the capab
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::26d7402752b73451115f55887caed319
https://pubmed.ncbi.nlm.nih.gov/31878639
https://pubmed.ncbi.nlm.nih.gov/31878639
Publikováno v:
Metrologia. 55:294-301
The volume of 28Si spheres about 94 mm in diameter is an input datum for the determination of the Avogadro constant. We report a finite element analysis of the self-weight effect on the volume determination via optical interferometric measurements of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::aac7ab99be53f58350a176cebd811c7a
https://doi.org/10.1088/1681-7575/aaaed5
https://doi.org/10.1088/1681-7575/aaaed5
Publikováno v:
Metrologia. 55:222-228
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0297f27f0733e57120c371ef7aaa94a8
https://doi.org/10.1088/1681-7575/aaac4d
https://doi.org/10.1088/1681-7575/aaac4d