A Parallel/Series Array of Superconducting Cold-Electron Bolometers with SIS' Tunnel Junctions

摘要

A novel concept of the parallel/series array of Superconducting Cold-Electron Bolometers (SCEB) with asuperconducting absorber and a SIS' (Superconductor-Insulator-Weak Superconductor) Tunnel Junctions has beenproposed. The current-biased SCEBs are connected in series for DC and in parallel for HF signal. A signal isconcentrated to the absorber through the capacitance of tunnel junctions and additional capacitance for coupling ofsuperconducting islands. Due to dividing power between an array of SCEBs and increasing responsivity, the noisematching is so effective that the photon NEP could be easily achieved at 300 mK with a room temperature JFET readout.The concept has been developed for matching with JFET readout for BOOMERanG balloon telescope. BOOMERanG isdevoted for measuring the CMB polarization.