Speaker
Description
We present the status of development of the Superconducting Tunnel
Junction (STJ) detector for the COsmic BAckground Neutrino Decay search
(COBAND) experiment. The signal of the cosmic background neutrino decay is
identified as a sharp cutoff at high energy end in a far-infrared region
ranging from 15meV to 30meV in the energy spectrum of the photons from the
space[1]. The COBAND experiment will be done as rocket and satellite
experiments in order to detect the far-infrared photons from the space.
For a photon detector of the COBAND experiment, we are developing the STJ
detectors[2][3]. We will use a combination of the diffraction grating and the
array of Nb/Al-STJ pixels with cryogenic amplifier for the rocket
experiment[4], and use Hf-STJ as a micro-calorimeter[5] for the future satellite
experiment. The present status of the detector R&D and the experimental design for the COBAND experiment is reported in
more detail.
