No readout noise or dark current

EIGER Hybrid Photon Counting detectors are completely free of readout noise and dark current. The figure shows a one hour dark image of a single EIGER module. The vast majority of the pixels has zero counts because EIGER detectors do not exhibit any dark current and, in addition to this, the readout does not add any noise to the data. General background radiation only gives rise to a single count per event; keeping noise from background radiation to a minimum. Average background on an EIGER module is only 0.07 counts per hour and pixel.