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Fig. 17
Cooldown of the cryostat and its payload. Blue, left to right: cryocooler 4 K head; one of the Band 1 mixers. Green, left to right: cryocooler 15 K head; one of the low noise IF preamplifiers. Black: one of the internal cold calibration loads. Red: cryocooler 70 K cold head.
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