Performance
Specifications
The CXC system is equipped with a 264 × 264 pixel pnCDD with a physical pixel size of 48 µm × 48 µm and an imaging area of 161 mm2. The on-chip electronics in combination with a fully column-parallel readout enables low noise operation at about 3 e-/pixel (ENC), and frame rates of up to 1000 Hz. Due to the advanced detector design, the internal potential distribution of the pnCCD can be adjusted by the operation voltages depending on the requirements of the individual experiments. Thus, excellent energy resolution (145 eV for Mn-Kα) and high spatial resolution modes (Δx < 15 µm) are available, as well as high charge handling capacity (up to 400000 e- per pixel), and anti-blooming modes for handling extremely high amounts of signal charges.
Key Features:
-
Excellent elemental information between 200 eV and 30 keV with an energy resolution of 145 eV (FWHM) at 5.9 keV (Mn-Kα) and 83 eV at 277 eV (C-K)
-
Standard full frame rate of 1,000 fps, up to 8,000 fps using windowing and binning. Excellent signal-to-noise ratio even at high readout speeds with typical 8e- at 1,000 fps
-
Capable to provide a HCHC mode (High Charge Handling Capacity, up to 400,000 e- per pixel), as well as an anti-blooming mode for handling extremely high amounts of signal charges
-
Inimitable single photon sensitivity and high intensity imaging with 400,000e- per pixel (corresponding to 10³ photons with an energy of 1 keV) at the same time
Spectrum of a radioactive 55Fe source
Single photon (left) and high intensity images (right)