| 摘要 |
PURPOSE:To reduce the vaporization of liquid helium with only one output terminal by connecting (n) pieces of resistances in parallel with the conventional DC-SQUID and detecting a magnetic flux generated as the sum of currents shunted with a supercoductive quantum interferometer. CONSTITUTION:Three resistances rX, rY and rZ and one input coil LiD of a detection superconductive quantum interferometer SD connected in series thereto respectively are connected in parallel to three DC superconductive quantum interferometers (DC-SQUID) SX, SY and SZ respectively. Currents IBX-IBZ flow through the SX-SZ separately and three independent magnetic signals are inputted into input coils LiX-LiZ respectively. Then, based on a load curve, currents DELTAIX-DELTAIZ shunt to the resistances rX-rZ and the sum DELTAIX+DELTAIY+DELTAIZ flows into the input coil LiD of the detection superconductive quantum interferometer SD to generate a magnetic flux in an SD loop. Three input signals are modulated at angular frequencies omegaX-omegaZ with modulation coils LMX-LMZ and then, undergoes a lock in detection. In this manner, they are separated and taken out. |
