NDLI: Gamma Ray Fresnel Lenses

Content Provider	Springer Nature Link
Author	Skinner, G. K.
Copyright Year	2006
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.
Starting Page	289
Ending Page	298
Page Count	10
File Format	PDF
ISSN	09226435
Journal	Experimental Astronomy
Volume Number	20
Issue Number	1-3
e-ISSN	15729508
Language	English
Publisher	Kluwer Academic Publishers
Publisher Date	2006-07-25
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Gamma-Ray Astronomy Optics Statistics for Engineering, Physics, Computer Science, Chemistry & Geosciences
Content Type	Text
Resource Type	Article
Subject	Astronomy and Astrophysics Space and Planetary Science

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