Author/Authors :
Kelley، نويسنده , , R.L and Audley، نويسنده , , M.D and Boyce، نويسنده , , K.R and Fujimoto، نويسنده , , R and Gendreau، نويسنده , , K.C and Ishisaki، نويسنده , , Y and McCammon، نويسنده , , D and Mihara، نويسنده , , T and Mitsuda، نويسنده , , K and Moseley، نويسنده , , S.H and Mott، نويسنده , , D.B and Porter، نويسنده , , F.S and Stahle، نويسنده , , C.K and Szymkowiak، نويسنده , , A.E، نويسنده ,
Abstract :
The Astro-E Observatory will employ a high-resolution X-ray spectrometer based on a 32 pixel array of microcalorimeters with an energy resolution of about 12 eV at 6 keV (the Fe–K region). This will provide spectral resolving power 10 times higher than any other non-dispersive X-ray spectrometer. The instrument incorporates a three-stage cooling system capable of maintaining the temperature of the detector stage at 60 mK for about two years in orbit with a 97% duty cycle. The array sits at the focus of a grazing incidence conical mirror. The quantum efficiency of the microcalorimeters and the reflectivity of the X-ray mirror system combine to give high throughput over the 0.3–12 keV energy band. This new capability will enable the study of a wide range of high-energy astrophysical sources with unprecedented spectral sensitivity.
Keywords :
missions , Detectors , Calorimeters , bolometers , X-Ray , Instruments , Spectrometer
