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Fig 2: Design for prototype
chip built at GSFC. The
pickup coil and superconducting film are deposited on opposite sides
of a silicon nitride membrane suspended by four legs.
The niobium-aluminum heat switch occupies one leg, leads for
the pickup coil are on two other legs, while the fourth leg provides a
return for the heater current passed through the heat switch leads and
bismuth absorber. |