Back to upper level Observatory, University of Helsinki ESA space science X-ray Evolving Universe Spectroscopy Mission (XEUS). Observatory coordinates instrument technology development in Finland for this future (launch ?) X-ray mission. Also participation in science planning. lämpömittari Nb TES (Ti/Au/Bi) 300 m Si 3 N 4 kerros (lämpöeristys) Piitä lämpötilassa T bath < T c I bias R shunt < 100 mK lämpökylpy absorbaattori röntgen- säteilyä SQUID Transition Edge Sensor (TES) Terminen kytkentä TES X-ray microcalorimeter scheme Change/evolution of plans: ESA-JAXA NASA-ESA-JAXA (XEUS + Constellation-X) Sensitivity: ~ erg cm -2 s -1
Back to upper level Observatory, University of Helsinki ESA space science Our share in XEUS (+ Constellation-X) plan NFI2 = TES microcalorimeter array 1.Collaboration with NL – Italy – UK Finnish group: UH/Obs. + VTT (+Univ. of Jyväskylä ? + companies ?) 3.SQUID readout array for the instrument by VTT 4.Science utilisation lämpömittari Nb TES (Ti/Au/Bi) 300 m Si 3 N 4 kerros (lämpöeristys) Piitä lämpötilassa T bath < T c I bias R shunt < 100 mK lämpökylpy absorbaattori röntgen- säteilyä SQUID Transition Edge Sensor (TES) Terminen kytkentä TES X-ray microcalorimeter
Back to upper level NFI2/TES-based micro-calorimeter specifications/features Field coverage: 32 arcsec Number of pixels: 32x32 Pixel size: 1 arcsec (= 240 micron) Energy range: keV energy resolution (FWHM): 2 1 keV, 5 7 keV Detection efficiency: 95% for 1-7 keV Count rate limit: 250 c/s/pixel Effective time constant: 0.1 ms TELESCOPE AND S/C FEATURES Telescope effective area: ~ 10 1 keV, ja ~ 3 7 keV Angular resolution: 2-5 arcsec (HEW). Also: XEUS orbital plan changed: L2-point instead of LEO
Back to upper level More specifically in XEUS context and plans More specifically in XEUS context and plans Evolution of large-scale structure – probing dark matter and energy Coeval growth of galaxies and their supermassive black holes Gravity in the strong field limit what else can be done ?