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Your search keyword '"Skinner, G."' showing total 30 results
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30 results on '"Skinner, G."'

2. Emergence of cabbage root flies from puparia collected throughout northern Europe

Author

Finch, S., primary, Bromand, B., additional, Brunel, E., additional, Bues, M., additional, Collier, R.H., additional, Dunne, R., additional, Foster, G., additional, Freuler, J., additional, Hommes, M., additional, Van Keymeulen, M., additional, Mowat, D.J., additional, Pelerents, C., additional, Skinner, G., additional, Städler, E., additional, and Theunissen, J., additional

Published
2020
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7. MAX, a Laue diffraction lens for nuclear astrophysics

Author

Barrière, N., primary, von Ballmoos, P., additional, Halloin, H., additional, Abrosimov, N., additional, Alvarez, J. M., additional, Andersen, K., additional, Bastie, P., additional, Boggs, S., additional, Courtois, P., additional, Courvoisier, T., additional, Harris, M., additional, Hernanz, M., additional, Isern, J., additional, Jean, P., additional, Knödlseder, J., additional, Skinner, G., additional, Smither, B., additional, Ubertini, P., additional, Vedrenne, G., additional, Weidenspointner, G., additional, and Wunderer, C., additional

Published
2006
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14. Low Energy Gamma Ray Imager (LEGRI)

Author

Ballesteros, F., primary, Bernabeu, G., additional, Giménez, A., additional, Fabregat, J., additional, Pérez, F., additional, Porras, E., additional, Reglero, V., additional, Reig, P., additional, Robert, A., additional, Sáenz, A., additional, Sánchez, F., additional, Díaz, E., additional, Martín, J. A., additional, Más, J. M., additional, Reina, M., additional, Sánchez, A., additional, Torralbo, I., additional, González, M., additional, Marín, J., additional, Martínez, L., additional, Olmos, P., additional, Pérez, J. M., additional, Cruise, M., additional, Swinyard, B. M., additional, Eyles, C., additional, Skinner, G., additional, Bird, A. J., additional, Dean, A. J., additional, and Ghuataure, H. S., additional

Published
1995
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19. X-Ray Observations of SN1987A with a Coded Mask Imaging Spectrometer

Author

Zand, J. J. M. in’t, primary, Jager, R., additional, Heise, J., additional, Brinkman, A. C., additional, Sunyaev, R. A., additional, Gilfanov, M. R., additional, Pappe, N. Yu., additional, Churazov, E. M., additional, Yamburenko, N. S., additional, Skinner, G. K., additional, Al-Emam, O., additional, Patterson, T. G., additional, and Willmore, A. P., additional

Published
1989
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28. Gamma ray Fresnel lenses — why not?

Author

von Ballmoos, Peter and Skinner, G. K.

Abstract

Fresnel lenses offer the possibility of concentrating the flux of X-rays or gamma-rays flux falling on a geometric area of many square metres onto a focal point which need only be a millimetre or so in diameter (and which may even be very much smaller). They can do so with an efficiency that can approach 100%, and yet they are easily fabricated and have no special alignment requirements. Fresnel lenses can offer diffraction-limited angular resolution, even in a domain where that limit corresponds to less than a micro second of arc. Given all these highly desirable attributes, it is natural to ask why Fresnel gamma ray lenses are not already being used, or at least why there is not yet any mission that plans to use the technology. Possible reasons (apart from the obvious one that nobody thought of doing so) include the narrow bandwidth of simple Fresnel lenses, their very long focal length, and the problems of target finding. It is argued that none of these is a ‘show stopper' and that this technique should be seriously considered for nuclear astrophysics. [ABSTRACT FROM AUTHOR]

Published
2006
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29. MAX, a Laue diffraction lens for nuclear astrophysics.

Author

von Ballmoos, Peter, Barrière, N., von Ballmoos, P., Halloin, H., Abrosimov, N., Alvarez, J. M., Andersen, K., Bastie, P., Boggs, S., Courtois, P., Courvoisier, T., Harris, M., Hernanz, M., Isern, J., Jean, P., Knödlseder, J., Skinner, G., Smither, B., Ubertini, P., and Vedrenne, G.

Abstract

The next generation of instrumentation for nuclear astrophysics will have to achieve a factor of 10-100 improvement in sensitivity over present technologies. With the focusing gamma-ray telescope MAX we take up this challenge: combining unprecedented sensitivity with high spectral and angular resolution, and the capability of measuring the polarization of the incident photons. The feasibility of such a crystal diffraction gamma-ray lens has recently been demonstrated with the prototype lens CLAIRE. MAX is a proposed mission which will make use of satellite formation flight to achieve 86m focal length, with the Laue lens being carried by one satellite and the detector by the other. In the current design, the Laue diffraction lens of MAX will consist of 13740 copper and germanium (Ge1−x Six, x ∼ 0.02) crystal tiles arranged on 36 concentric rings. It simultaneously focuses in two energy bands, each centred on one of the main scientific objectives of the mission: the 800-900 keV band is dedicated to the study of nuclear gamma-ray lines from type Ia supernovae (e.g. 56Co decay line at 847 keV) while the 450-530 keV band focuses on electron-positron annihilation (511 keV emission) from the Galactic centre region with the aim of resolving potential point sources. MAX promises a breakthrough in the study of point sources at gamma-ray energies by combining high narrow-line sensitivity (better than 10−6 cm−2 s−1) and high energy resolution (E/dE ∼ 500). The mission has successfully undergone a pre-phase A study with the French Space Agency CNES, and continues to evolve: new diffracting materials such as bent or composite crystals seem very promising. [ABSTRACT FROM AUTHOR]

Published
2006
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