X-Ray Pore Optics Technologies and Their Application in Space Telescopes

Figure 13

(a) PSF of the first plate (bottom) of a stack of 9 wedged plates measured using established procedures in single reflection at 2.8 keV at the FEM beamline in the PTB lab at the BESSY synchrotron radiation facility. The full length of the plate was scanned using a 100 $\mu$m pencil beam with an intrinsic HEW of $4^{\prime \prime }$. The scans where repeated every 2 mm over the full width of the plate. The resulting PSF, excluding the direct beam, has a HEW of ${4.2}^{\prime \prime }$. (b) The same measurement repeated on the entire stack of 9 plates. The HEW of the PSF, excluding the direct beam, is $7^{\prime \prime }$. In double reflection this would result in a HEW of a mirror module of ${10}^{\prime \prime }$.

(a)

(b)