RIXSCAM – A MULTI-EMCCD LARGE DETECTOR AREA SYSTEM WITH SINGLE PHOTON DETECTION AND SUB-PIXEL RESOLUTION FOR SOFT X-RAY DETECTION

In this new range of camera systems, XCAM combines the single-photon detection capabilities of custom EMCCDs with licensed centroiding technology to deliver sub-pixel resolution for RIXS (Resonant Inelastic X-ray Scattering) applications.

EMCCDs provide single-photon detection with sub-electron read noise. When cryogenically cooled down to temperatures in the range of -110 to -50 ˚C as in the RIXSCam, dark current and associated dark current noise also becomes negligible, permitting a range of camera operation modes. In XCAM’s RIXSCam system, custom EMCCDs are used which are full-frame devices with 1632x1608 16µm pixels; these are back-illuminated and have no AR coating to provide an outstanding soft X-ray response. One to three of these devices are closely butted to provide a greater signal-to-noise ratio.

The detector assembly is mounted on a tiltable stage which can be adjusted through all angles from the outside of the camera, and locked in position. This enables the user to reduce the effective size of the pixels.

Finally, a centroiding algorithm, developed jointly by the Paul-Scherrer Institute and the Open University, is applied to the resulting image, providing at output a ‘super-resolution’ image of up to 10 times the original resolution. This provides a resolution of better than 5µm and better than 3µm has been demonstrated during experimental phases. The ultimate resolution achievable depends on the local experimental set-up as well as the camera system.

Model Imaging Pixels per Detector Pixel Size (µm2) Number of Detectors
RIXSCam3 1632 x 1608 16 x 16 3
RIXSCam2 " " 2
RIXSCam1 " " 1

For more details please enquire or download the RIXSCam product information sheet below.