Publisher’s Note: This paper, originally published on 20 July 2018, was replaced with a corrected/revised version on 12 October 2018. If you downloaded the original PDF but are unable to access the revision, please contact SPIE Digital Library Customer Service for assistance.
Next generation X-ray mission concepts (e.g. Lynx) call for a wide field X-ray imager with high detection
efficiency from 0.2 keV to 10 keV and fast readout capability (> 10 Hz frame rate). In order to properly sample
the planned fine angular resolution of the optical assembly (0:5’’ HPD), small pixel sizes of less than or equal to
16 microns are required. Hybrid CMOS detectors are a type of active pixel sensor that is well suited to the high
throughput and wide bandpass requirements of such instruments, and the pixel size goals are well within reach.
In collaboration with Teledyne Imaging Sensors, the Penn State X-ray detector lab has developed new small
pixel Hybrid CMOS sensors to meet these needs. These prototype 128 x 128 pixel devices have 12.5 micron pixel
pitch, 100 micron fully depleted depth, and include crosstalk-eliminating CTIA amplifiers and in-pixel correlated
double sampling capability. We report on characteristics of one of these new detectors, including read noise,
energy resolution, and pixel-to-pixel gain variation. The read noise was measured to be as low as 5:54 e- ± 0:05
e-, while the gain variation was found to be 1:12% ± 0:06%. The energy resolution, including calibration for
gain variation, was measured to be as good as 148 eV (2.5%) at 5.9 keV.