XMM-Newton: light path of X-rays
Date: 16 May 2012
The light path of X-rays through XMM-Newton (upper section). The spacecraft carries three telescopes each consisting of 58 nested, gold-coated, tube-like mirrors. The combination of parabolic and hyperbolic mirrors used is shown in a cross section through one of the telescopes (middle section). X-rays that graze the mirror surfaces are reflected twice and focused onto a detector. The X-rays must graze the mirror at angles of 1° or even less, or they are likely to be absorbed (lower section).
Last Update: 23 May 2012
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