A single polycell top left one of the ISGRI cameras building
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A single polycell (top left), one of the ISGRI camera's building blocks, seen without its ceramic cover to show the detectors

January 5, 2013
A 5 centime coin conveys the scale of the polycell (top left). These polycells form the building blocks of the INTEGRAL Soft Gamma-Ray Imager (ISGRI).

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