Lambda 60k+250k

Designed for high-end X-ray imaging, the LAMBDA 60K provides fast, sensitive detection in a compact package using the Medipix3 chip.

Pioneered by one of the leading research institutes of the world LAMBDA cameras provide the speed and resolution for even the most demanding tasks.

Technical Information

dimensions: 150x85x42 mm3
weight: 0.9 kg
cooling: air- or water-cooled

Sensor Options


LAMBDA with High-Z sensor is well suited for energies above 20 keV

X-Spectrum has developed versions of the LAMBDA system where the silicon sensor is replaced with one of the “high-Z“ materials, Gallium Arsenide (GaAs) or Cadmium Telluride (CdTe), which provide greater detection efficiency at high X-ray energies. With these sensors, the LAMBDA system combines efficient hard X-ray detection with zero noise, high spatial resolution and high speed. In particular, the 2000 frames per second readout of a high-Z LAMBDA system is more than 1000 times faster than a typical flat-panel detector, enabling time-resolved hard X-ray experiments on millisecond timescales.

Sensor material: Gallium Arsenide or
Cadmium Telluride

As shown to the right, Cadmium Telluride has higher quantum efficiency than Gallium Arsenide at higher X-ray energies, so it is the natural choice for experiments at 60 keV and above. However, CdTe also strongly re-emits fluorescence photons around 25-30 keV when illuminated with higher-energy photons, which can reduce the detected signal and slightly blur the image.

So, GaAs is beneficial in the 25 – 50 keV range. After flat-field correction, GaAs sensors also deliver better image uniformity.

If you consider using high-Z material, contact our sales department beforehand. Together, we’ll find the best solution for your experiment.

Depending on the sensor material the following specifications are valid:

Si GaAs CdTe
Energy range: 6 – 25 keV 8 – 75 keV 8 – 150 keV
Adjustable threshold range: 4 – 40 keV 5 – 50 keV 5 – 75 keV