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A single pixel of a150 GHz antenna-coupled array
Detector ArrayBICEP3 uses antenna-coupled Transition Edge Sensor (TES) arrays similar to the ones in BICEP2/Keck and SPIDER. The beams formed by the planar antennas couple directly to the optical system. Completely lithographic fabrication allows easy scaling to large array formats and very fast production of arrays. Each pixel comprises a sub-array of dual-polarization slot antennas that couple incoming radiation to a pair of matched detectors sensitive to orthogonal polarization. |
Fully populated 20-tile FPU of BICEP3
The Focal Plane Unit and CryostatBICEP3 employs lithographic phase arrays and time domain SQUID multiplexers for its FPU. There are 20 tiles, each of which has 128 antenna-coupled TESs. The cryostat is cooled by a pulse-tube cooler and a 3-stage Helium absorption fridge. The cryostat has multiple stages of magnetic shielding on the warmer stages to complement each detector module's superconducting niobium shields. |
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Kuo Lab | Physics Department | Stanford University | All rights reserved | All rights reserved | POLAR-1 is supported by the National Science Foundation |