Designing the x-ray microcalorimeter spectrometer for optimal science return

Andrew Ptak, Simon R. Bandler, Jay Bookbinder, Richard L. Kelley, Robert Petre, Randall K. Smith, Stephen Smith, Oswald H. Siegmund
2013 UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XVIII  
Recent advances in X-ray microcalorimeters enable a wide range of possible focal plane designs for the X-ray Microcalorimeter Spectrometer (XMS) instrument on the future Advanced X-ray Spectroscopic Imaging Observatory (AXSIO) or X-ray Astrophysics Probe (XAP). Small pixel designs (75 µm) oversample a 5-10" PSF by a factor of 3-6 for a 10 m focal length, enabling observations at both high count rates and high energy resolution. Pixel designs utilizing multiple absorbers attached to single
more » ... tion-edge sensors can extend the focal plane to cover a significantly larger field of view, albeit at a cost in maximum count rate and energy resolution. Optimizing the science return for a given cost and/or complexity is therefore a non-trivial calculation that includes consideration of issues such as the mission science drivers, likely targets, mirror size, and observing efficiency. We present a range of possible designs taking these factors into account and their impacts on the science return of future large effective-area X-ray spectroscopic missions.
doi:10.1117/12.2024423 fatcat:yvhynpjw6fbezgsvhl4p65m5ce