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G. Lutz and R. Klanner
Fig. 5.46 Layout of a macro pixel matrix
Fig. 5.47 55 Fe spectrum measured at room temperature in a 1 × 1 mm 2 pixel of an 8 × 8 macro
pixel matrix with 6 μs shaping. The increase of the noise compared to single DEPFET cells is due
to the leakage current in the large sensitive volume of 1 × 1 × 0.45 mm 3 , which can be reduced
by cooling
(c) Nonlinear DEPFETs [41] developed for applications at the European X-ray
Free Electron Laser (EuXFEL) at Hamburg. Their non-linear characteristics and
high-speed capability combines simultaneously single X-ray-photon sensitivity
and very high dynamic range at the 5 MHz EuXFEL repetition rate.
G. Lutz and R. Klanner
Fig. 5.46 Layout of a macro pixel matrix
Fig. 5.47 55 Fe spectrum measured at room temperature in a 1 × 1 mm 2 pixel of an 8 × 8 macro
pixel matrix with 6 μs shaping. The increase of the noise compared to single DEPFET cells is due
to the leakage current in the large sensitive volume of 1 × 1 × 0.45 mm 3 , which can be reduced
by cooling
(c) Nonlinear DEPFETs [41] developed for applications at the European X-ray
Free Electron Laser (EuXFEL) at Hamburg. Their non-linear characteristics and
high-speed capability combines simultaneously single X-ray-photon sensitivity
and very high dynamic range at the 5 MHz EuXFEL repetition rate.