Studying ATHENA optics with divergent and collimated x-ray beams
Abstract
An open question in the measurement of X-ray optics for satellite experiments is what the PSF (point spread function) looks like in orbit and what the focal length for a source at infinite distance is. In order to measure segmented optics as proposed for ATHENA a collimated X-ray beam with a size of several square centimeters is necessary. We showed that by using a zone plate such a collimated beam can be achieved. We discuss here the requirements such a zone plate collimator has to comply in order to characterize with this collimator an ATHENA type optic. Additional we can present results obtained with a first version of such a collimator and can show so the proof of principle.
- Publication:
-
Space Telescopes and Instrumentation 2014: Ultraviolet to Gamma Ray
- Pub Date:
- July 2014
- DOI:
- 10.1117/12.2057463
- Bibcode:
- 2014SPIE.9144E..5JM