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01. In the foreground is a L band and S band receiver, the one behind is a C band and X band receiver. They were built at the Radiophysics facilities near Epping in Sydney. |
02. This device is a feed horn, machined to be used at the focus of the antenna. It is for the C band and X band receiver. |
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03. The stainless steel dewar has the air evacuated from within it to insulate the cryogenically cooled electronics from the outside world. Helium is used as the refrigerant. |
04. Here you can see the electronics which are located inside the cryogenically cooled dewar in each antenna. This equipment operates at -263°C (10 degrees above absolute zero): the cooling cuts down the "noise" generated by the receiver, allowing very weak astronomical signals to be detected. |
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Last update : 28 Oct 2000 |