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7 results on '"Nelms N"'

1. Proton radiation effect on InAs avalanche photodiodes

Author

Zhou, X., White, B., Meng, X., Zhang, S., Gutierrez, M., Robbins, M., Rojas, L.G., Nelms, N., Tan, C.H., and Ng, J.S.

Abstract

With increasing interest over the past decade in space-related remote sensing and communications using near-infrared (NIR) wavelengths, there is a need for radiation studies on NIR avalanche photodiodes (APDs), due to the high radiation environment in space. In this work, we present an experimental study of proton radiation effects on performance parameters of InAs APDs, whose sensitivity extends from visible light to ∼3.5 μm. Three irradiation energies (10.0, 31.4, and 58.8 MeV) and four fluences (109 to 1011 p/cm2) were used. At the harshest irradiation condition (10.0 MeV energy and 1011 p/cm2 fluence) the APDs' avalanche gain and leakage current showed a measurable degradation. However, the responsivity of the APDs was unaffected under all conditions tested. The data reported in this article is available from the figshare digital repository (DOI: https://dx.doi.org/10.15131/shef.data.4560562).

Published
2017

3. Experiments on highly charged heavy ions in conjunction with exotic atoms

Author

Indelicato, P., Trassinelli, Martino, Anagnostopoulos, D. F., Boucard, S., Covita, D. S., Borchert, G., Dax, A., Egger, J. P., Gotta, D., Gruber, A., Hirtl, A., Hennebach, M., Fuhrmann, H., Le Bigot, E. -O., Liu, Y. -W, Manil, B., Nelms, N., Schlesser, S., Santos, J. M. F., Simons, L. M., Stingelin, L., Veloso, J., Wasser, A., Wells, A., Zmeskal, J., Laboratoire Kastler Brossel (LKB (Jussieu)), Université Pierre et Marie Curie - Paris 6 (UPMC)-Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS), Institut des Nanosciences de Paris (INSP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), Department of Material Science and Engineering (DMSE), University of Ioannina, Departamento de Física, University of Coimbra [Portugal] (UC), Paul Scherrer Institute (PSI), Physics Department, Yale University [New Haven], Institut für Kernphysik (KFA), Forschungszentrum Jülich GmbH | Centre de recherche de Juliers, Helmholtz-Gemeinschaft = Helmholtz Association-Helmholtz-Gemeinschaft = Helmholtz Association, Institut für Mittelenergiephysik (IMEP), Austrian Academy of Sciences (OeAW), Laboratoire de Physique des Lasers (LPL), Université Paris 13 (UP13)-Centre National de la Recherche Scientifique (CNRS), Sabin, JR and Brandas, Fédération de recherche du Département de physique de l'Ecole Normale Supérieure - ENS Paris (FRDPENS), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[PHYS.COND]Physics [physics]/Condensed Matter [cond-mat]
Abstract

International audience; We demonstrate how combining highly-charged ions and exotic atoms measurements can provide high-accuracy information on particle properties, like the pion mass, on interactions, like the pion-proton strong interaction at low energy, and bound-state QED in strong fields. The use of highly-charged ion X-rays emitted by the plasma inside a super-conducting ion source provides a very detailed characterization of the response function of the X-ray spectrometer used to study exotic atoms, allowing for very accurate measurements. Conversely the use of the same high-resolution and high transmission spectrometer provides very accurate measurements of X-ray lines of few-electron ions.

Published
2006
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5. Instrumentation For Geological Fieldwork on the Moon

Author

Talboys, D. L., Fraser, G. W., Ambrosi, R. M., Nelms, N., Bannister, N. P., Sims, M. R., Pullan, D., and Holt, J.

Subjects
Physics - Geophysics, Physics - Instrumentation and Detectors, FOS: Physical sciences, Instrumentation and Detectors (physics.ins-det), Geophysics (physics.geo-ph)
Abstract

A human return to the Moon will require that astronauts are well equipped with instrumentation to aid their investigations during geological field work. Two instruments are described in detail. The first is a portable X-ray Spectrometer, which can provide rapid geochemical analyses of rocks and soils, identify lunar resources and aid selection of samples for return to Earth. The second instrument is the Geological and Radiation environment package (GEORAD). This is an instrument package, mounted on a rover, to perform in-situ measurements on the lunar surface. It can be used for bulk geochemical measurements of rocks and soils (particularly identifying KREEP-enriched rocks), prospect for ice in shadowed areas of craters at the poles and characterise the lunar radiation environment., Comment: Earth, Moon and Planets in press, special issue Human Space Exploration, 11 pages, 5 figure

Published
2005
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6. Mass of the charged pion

Author

Anagnostopoulos, Df, Borchert, G., Egger, Jp, Gotta, D., Hennebach, M., Paul Indelicato, Liu, Yw, Manil, B., Nelms, N., and Simons, Lm

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