CLAIRE's first light

Details CLAIRE's first light CLAIRE's first light

Feb 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004newar..48..243v&link_type=abstract

New Astronomy Reviews, Volume 48, Issue 1-4, p. 243-249.

Physics

Optics

11

Gamma-Ray Optics, Instruments For Nuclear Astrophysics

Scientific paper

The objective of the R&D project CLAIRE is to prove the principle of a gamma-ray lens for nuclear astrophysics. CLAIRE features a Laue diffraction lens, an actively shielded array of germanium detectors, and a balloon gondola stabilizing the gamma-ray lens to a few arcseconds. On June 14 2001, the instrument was flown on a stratospheric balloon by the French Space Agency CNES; the astrophysical target was a ``standard candle'', the Crab nebula. CLAIRE's first light consists of ~33 diffracted photons from the Crab, corresponding to a 3σ detection. The performance of the gamma-ray lens during the balloon flight has been confirmed by ground data obtained at a 200 m long test range. Based on the diffraction efficiencies measured with CLAIRE, the mission concept of a space borne gamma-ray lens is proposed, and its potential for nuclear astrophysics is outlined.

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