Eureca - A European-japanese Micro-calorimeter Array Under Development For Ixo

Details Eureca - A European-japanese Micro-calorimeter Array Under Development For Ixo Eureca - A European-japanese Micro-calorimeter Array Under Development For Ixo

Jan 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21345714d&link_type=abstract

American Astronomical Society, AAS Meeting #213, #457.14; Bulletin of the American Astronomical Society, Vol. 41, p.360

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The EURECA (EURopean-JapanEse Calorimeter Array) project aims to demonstrate the science performance and technological readiness of an imaging X-ray spectrometer based on a micro-calorimeter array for application in future X-ray astronomy missions, like IXO, XENIA, and DIOS. Since the recent merger of the ESA XEUS and NASA Constellation-X studies into a joint ESA/NASA/JAXA study of the International X-ray Observatory (IXO) collaboration between GSFC and NIST (U.S.), SRON and INAF (Europe), and ISAS (Japan) has been established.
The prototype instrument consists of a 5 x 5 pixel array of TES-based micro-calorimeters read out by by two SQUID-amplifier channels using frequency-domain-multiplexing (FDM). The SQUID-amplifiers are linearized by digital base-band feedback. The detector array is cooled in a cryogen-free cryostat consisting of a pulse tube cooler and a two stage ADR. A European-Japanese consortium designs, fabricates, and tests this prototype instrument. This paper describes the instrument concept, and shows the design and status of the various sub-units, like the TES detector array, LC-filters, SQUID-amplifiers, AC-bias sources, digital electronics, etc.
Initial tests of the system at the PTB beam line of the BESSY synchrotron showed stable performance and an X-ray energy resolution of 1.58 eV at 250 eV and 2.5 eV @ 5.9 keV for the read-out of one TES-pixel only. Next step is deployment of FDM to read-out the full array. Full performance demonstration is expected mid 2009.

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