Zobrazeno 1 - 10 of 20 pro vyhledávání: '"G. P. Barwood"'
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Trapped strontium ion optical clock
Autor: G. P. Barwood, B. R. Walton, G Huang, S. N. Lea, P. Gill, H. A. Klein, H. S. Margolis, Krzysztof Szymaniec, K. Hosaka
Publikováno v: International Conference on Space Optics — ICSO 2006.
Increasingly stringent demands on atomic timekeeping, driven by applications such as global navigation satellite systems (GNSS), communications, and very-long baseline interferometry (VBLI) radio astronomy, have motivated the development of improved
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a0164e532ae98e99d9eba0bf29955875
https://doi.org/10.1117/12.2308177
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3
Trapped ion88Sr+optical clock systematic uncertainties - AC Stark shift determination
Autor: H A Klein, G P Barwood, P Gill, G Huang, S. A. King
Publikováno v: Journal of Physics: Conference Series. 723:012024
A recent comparison between two trapped-ion 88Sr+ optical clocks at the UK. National Physical Laboratory demonstrated agreement to 4 parts in 1017. One of the uncertainty contributions to the optical clock absolute frequency arises from the blackbody
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::65340e04c6962ac749853916b010216d
https://doi.org/10.1088/1742-6596/723/1/012024
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5
Frequency noise processes in a strontium ion optical clock
Autor: S. A. King, Guilong Huang, G. P. Barwood, Patrick Gill, H. A. Klein
Publikováno v: Journal of Physics B: Atomic, Molecular and Optical Physics. 48:035401
A recent comparison of the frequencies of a pair of optical clocks based on the 674 nm 2S1/2–2D5/2 optical clock transition in 88Sr+ has highlighted the need to understand factors affecting frequency instability. We have developed statistical model
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::72e4faa6bcdd48d8d3ff946f17313fd6
https://doi.org/10.1088/0953-4075/48/3/035401
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7
Measurement of the electric quadrupole moment of the 4d2D5/2 level in 88Sr+
Autor: G P, Barwood, H S, Margolis, G, Huang, P, Gill, H A, Klein
Publikováno v: Physical review letters. 93(13)
The quadrupole moment of the 4d (2)D(5/2) level in 88Sr+ has been measured to be 2.6(3)ea(2)(0), where a(0) is the Bohr radius and e the elementary charge. A single laser-cooled strontium ion was confined in an end cap trap with a variable dc quadrup
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::2ae79fdf15e1ec3eb003a3a81a8688a1
https://pubmed.ncbi.nlm.nih.gov/15524716
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10
An IR tunable diode laser absorption spectrometer for trace humidity measurements at atmospheric pressure
Autor: P. Gill, M. Stevens, R. Benyon, C S Edwards, P Mackrodt, B Schirmer, G P Barwood
Publikováno v: 2000 Digest of the LEOS Summer Topical Meetings. Electronic-Enhanced Optics. Optical Sensing in Semiconductor Manufacturing. Electro-Optics in Space. Broadband Optical Networks (Cat. No.00TH8497).
There is an increasing demand for the measurement of trace humidity in air at levels down to a few parts in 10/sup 9/ (ppb/sub v/) at atmospheric pressure. This summary describes the development by a European collaboration of a diode laser absorption
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::03a2192b804e67c369df2579bb9435be
https://doi.org/10.1109/leosst.2000.869706
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