J. Phys. IV France 12 (2002) Pr3-145
Tantalum superconducting tunnel junctions for photon counting detectorsC. Jorel1, 2, P. Feautrier1, J.-C. Villégier2 and A. Benoit3
1 LAOG, 414 rue de la Piscine, Domaine Universitaire, 38040 Grenoble cedex 9, France
2 CEA Grenoble, SPSMS/LCP, 38054 Grenoble cedex 9, France
3 CRTBT, CNRS, BP. 166, 38042 Grenoble cedex 9, France
This paper presents the fabrication of Ta Superconducting Tunnel Junction detector working at 0.2 K to be used for photon counting instruments in astronomical applications. We would like to operate this type of detectors up to 2.5 Mm with a moderate energy resolution in order to offer innovative instrumental perspectives to the astronomical community. The Ta junction fabrication and characterization as well as photon counting experiments in the near-infrared are presented. Fabrication process improvements are discussed at the end of this paper.
© EDP Sciences 2002