Zobrazeno 1 - 10
of 80
pro vyhledávání: '"W. Spirkl"'
Publikováno v:
Le Journal de Physique IV. :Pr3-117
An optical measurement for radiation concentrators is proposed. A Lambertian light source is placed in the exit aperture of the concentrator. By taking pictures of the concentrator as seen from a remote location one gets the transmission patterns whi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::020526e59caf2a1b678f7e7457f38f8b
https://doi.org/10.1051/jp4:1999318
https://doi.org/10.1051/jp4:1999318
Publikováno v:
Le Journal de Physique IV. :Pr3-111
We present asymmetric secondary reflectors made of plane facets for increasing the concentration of radiation from a field of heliostats. The reflectors are suited for partitioning the receiver in several parallel units. In the case of an asymmetric
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fbfd3d40a292ef6eb28c583438fe367f
https://doi.org/10.1051/jp4:1999317
https://doi.org/10.1051/jp4:1999317
Autor:
A.D. Johnson, A. G. Cullis, A.M. Keir, Brian K. Tanner, W. Spirkl, B. Lunn, S. J. Barnett, G.F. Clark, T. Martin, W.E. Hagston, P. Ashu, C. R. Whitehouse, J.H. Jefferson, G. Lacey, J C H Hogg, G. W. Smith, Brian F. Usher
Publikováno v:
Journal of Crystal Growth. 150:85-91
The important value of the X-ray topography (XRT) technique for the investigation of III–V strained-layer relaxation processes is described. In addition to post-growth ex-situ XRT studies, a unique combined XRT/MBE growth facility has been construc
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c826a587bff3ca99d297df95c82b86a8
https://doi.org/10.1016/0022-0248(95)80186-g
https://doi.org/10.1016/0022-0248(95)80186-g
Autor:
A. D. Johnson, Brian K. Tanner, S. J. Barnett, G. W. Smith, J C H Hogg, B. Lunn, T. Martin, J.H. Jefferson, W.E. Hagston, G. Lacey, P. Ashu, C. M. Castelli, W. Spirkl, G.F. Clark, A. M. Keir, A. G. Cullis, C. R. Whitehouse
Publikováno v:
Journal of Physics D: Applied Physics. 28:A17-A22
We report results from a novel facility constructed to enable in situ X-ray diffraction studies during the molecular beam epitaxy growth of Ill-V strained layer device structures on 50 mm diameter substrates. This new facility, used in conjunction wi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c0b7a50b15554cb5281d8befb73223e4
https://doi.org/10.1088/0022-3727/28/4a/003
https://doi.org/10.1088/0022-3727/28/4a/003
Publikováno v:
Journal of Applied Physics. 77:2133-2137
Thin TiNxOy films were deposited on glass substrates in an activated reactive evaporation process. The influence of the reactive gas composition and pressure during deposition on the film density ρMass was investigated by grazing incidence x‐ray
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::909abcb097214b92b68c8876032d398e
https://doi.org/10.1063/1.358790
https://doi.org/10.1063/1.358790
Autor:
G.F. Clark, C. R. Hogg, S. J. Barnett, A. D. Johnson, W.E. Hagston, Brian F. Usher, C. R. Whitehouse, W. Spirkl, Brian K. Tanner, A. G. Cullis, B. Lunn, A. M. Keir
Publikováno v:
Philosophical Magazine A. 70:531-548
X-ray reflection topography for imaging misfit dislocations in highly strained systems with a small critical thickness is assessed. The samples often contain complex heterostructures such as capping layers, quantum wells or superlattices. For the fir
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0595a11ce272e27d3105a7f67ccb723a
https://doi.org/10.1080/01418619408242557
https://doi.org/10.1080/01418619408242557
The use of parameter identification for flat-plate collector testing under non-stationary conditions
Publikováno v:
Renewable Energy. 4:217-222
A dynamic collector model for testing collectors and collector arrays under non-stationary operation is described. The aim of the model is to characterize the behaviour of a wide range of flat-plate collectors. The model takes explicitly into account
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::dfc06a6373d47c88820c334c8bee5af0
https://doi.org/10.1016/0960-1481(94)90006-x
https://doi.org/10.1016/0960-1481(94)90006-x
Autor:
C. R. Whitehouse, S. J. Barnett, Brian K. Tanner, W.E. Hagston, A. G. Cullis, B. Lunn, A. M. Keir, C. R. Hogg, A. D. Johnson, Brian F. Usher, G. E. Clark, W. Spirkl
Publikováno v:
Philosophical Magazine A. 69:221-236
Images of misfit dislocations as obtained from X-ray reflection topography with a low incidence angle are simulated. New algorithms for integrating numerically the Takagi–Taupin equations are presented with decoupled, variable and adaptively chosen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::71d45621aec86dd464f04229c86ebe33
https://doi.org/10.1080/01418619408242219
https://doi.org/10.1080/01418619408242219
Autor:
W. Spirkl
Publikováno v:
Journal of Applied Physics. 74:1776-1780
A method for parameter identification in grazing incidence x‐ray reflectometry is presented. It is based on a nonlinear least‐squares approach with on‐line low‐pass filtering and fits the measured reflectivity curve as a function of the incid
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::947483c5dd632b96fa3f6772b1eeca45
https://doi.org/10.1063/1.354807
https://doi.org/10.1063/1.354807
Autor:
R. Sizmann, W. Spirkl
Publikováno v:
Journal of Applied Physics. 73:8601-8606
The actual performance of series‐connected photovoltaic multigap cells may substantially deviate from the design point performance. The influence of variations in cell temperature, solar irradiance, and its spectral distribution on thermodynamicall
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::011fc6a091213b2b6532496adbe250b4
https://doi.org/10.1063/1.353390
https://doi.org/10.1063/1.353390