Computer Science – Performance
Scientific paper
Jan 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21345712k&link_type=abstract
American Astronomical Society, AAS Meeting #213, #457.12; Bulletin of the American Astronomical Society, Vol. 41, p.359
Computer Science
Performance
Scientific paper
We are studying the implementation of a high-resolution x-ray imaging spectrometer for the International X-Ray Observatory (IXO) based on an array of transition edge sensor calorimeters. This technology has shown excellent potential for meeting the observatory requirements for high spectral resolution over a wide range of energies (0.1-10 keV), and with pixel sizes matched to the performance of the x-ray mirror for true imaging x-ray spectroscopy over a field of view of 5 x 5 arcmin. The array will consist of a 40 x 40 central core that has 3 arcsec pixels with better than 2.5 eV spectral resolution (corresponding to a resolving power of over 2400 at 6 keV, the energy of the abundant Fe K emission complex.) This will be surrounded by an outer array with 52 pixels on a side, each subtending 6 arcsec, that will extend the field of view to 5.4 arcmin. To read out the array, we will use a multiplexed SQUID system to reduce the wire count and heat loads to the cryogenic system. The outer array will be multiplexed further in a sense by having four x-ray absorbers coupled to a single SQUID amplifier. The operating temperature of 0.1K for the array will be maintained by a cryogen-free system based on a multi-stage ADR and mechanical cooler (pulse tube for our present study, but a Joule-Thomson cooler is also viable.) This system will provide continuous operation for more than five years. In this poster we will illustrate the IXO calorimeter spectrometer design and give the expected system performance for high resolution imaging x-ray spectroscopy.
Bandler Simon R.
Brekosky Regis P.
Brown Adrian
Chervenak James A.
Dipirro Michael J.
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