A 20 cm2 CCD mosaic camera for a dark matter search part I : Mechanics,optics and cryogeny |
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| Authors: | Arnaud,M.,Aubourg,E.,Bareyre,P.,Br' ehin,S.,Caridroit,R.,de Kat,J.,Dispau,G.,Djidi,K.,Gros,M.,Lachièze-Rey,M.,Laigneau,Y.,Laurent,B.,Lesquoy,E.,Lavocat,Ph.,Magneville,C.,Mazeau,B.,Milsztajn,A.,Moscoso,L.,Pasquaud,J.,Paul,B.,Perrin,P.,Petibon,J.,Piret,Y.,Queinnec,F.,Rich,J.,Spiro,M.,de Trogoff,J.,Vigroux,L.,Zylberajch,S.,Ansari,R.,Cavalier,F.,Moniez,M.,Beaulieu,J. P.,Ferlet,R.,Grison,Ph.,Vidal-Madjar,A.,Adrianzyk,G.,Berger,J. P.,Burnage,R.,Delclite,J. C.,Kohler,D.,Magnan,R.,Richaud,A.,Guibert,J.,Moreau,O.,Tajahmady,F.,Baranne,A.,Maurice,E.,Prévôt,L.,Gry,C. |
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| Affiliation: | (1) DAPNIA, CE Saclay, 91191 Gif-sur-Yvette, France;(2) Laboratoire de l'Accélérateur Linéaire, Centre d'Orsay, 91405 Orsay Cedex, France;(3) Institut d'Astrophysique de Paris, 98 bis Boulevard Arago, 75014 Paris, France;(4) Observatoire de Haute Provence, 04870 Saint Michel l'Observatoire;(5) Observatoire de Paris, 61 avenue de l'Observatoire, 75014 Paris, France;(6) Observatoire de Marseille, 2 Place Le Verrier, 13248 Marseille Cedex 04, France;(7) Laboratoire d'Astronomie Spatiale de Marseille Traverse du Siphon, Les Trois Lacs, 13120 Marseille, France |
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| Abstract: | A 20cm2 CCD mosaic camera has been especially built to search for dark galactic halo objects by the gravitational microlensing effect. The sensitive area is made of 16 edge-buttable CCDs developped by Thomson-CTS, with 23×23 µm2 pixels. The 35 kg camera housing and mechanical equipment is presented. The associated electronics and data acquisition system are described in a separate paper. The camera resides at the focal plane of a 40 cm, f/10, Ferson reflector. The instrument has been in operation since December 1991 at the La Silla Observatory (ESO). |
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