FASPAX Readout Technology

Technology Summary

The FASPAX (Fermi-Argonne Semiconductor Pixel Array X-ray) detector is an integrating detector with wide dynamic range and high burst frame rate. Intended for use at the Advanced Photon Source (APS) at Argonne National Laboratory, the detector uses in-pixel analog storage to acquire a burst of images at frame rates of up to 13 MHz, with further provision for user defined timing schemes.

The Invention

Fermilab developed the readout technologies for this unique detector. To fully use the increased brightness of modern synchrotron beamlines, Fermilab has taken the integration approach rather than counting impinging photons one by one. The solution reads out each pixel simultaneously with a novel fast-readout circuit, thereby overcoming pulse pileup.


FASPAX has a fast frame rate, five orders of magnitude dynamic range, and small pixel size on a seamless, fully-active wafer scale detector. It exceeds the capability of any existing X-ray detector.

Applications and Industries

FASPAX can be used to perform science on synchrotron radiation beamlines as well as in novel interrogation scenarios for portal monitoring.


Category: Detector Technologies

Tags and keywords: High Resolution Imaging, Wafer Scale, Camera, High Dynamic Range, X-ray, Synchrotron, Diffraction


FASPAX v1 integrated circuit test chip

Invention Details

Patent Status: Multiple patents pending

Aaron G Sauers, CLP
Fermilab, MS 312 – PO Box 500
Batavia, IL 60510