Retractable Detector

The Cheetah, a single electron sensitive retractable detector has been recognized as an excellent solution for the microscopy society for various applications from basic electron diffraction (ED) experiments to uses in techniques such as Precession Electron Diffraction, 4D STEM (scanningTEM), cryo-EM and 3D ED Tomography, where standard CCD and CMOS detectors lack the competence to capture the information these methods can give.

This technology is based on sophisticated read-out ASICs, called Medipix/Timepix, where high resolution timing and spectral information of particles can be obtained. Get to know the hybrid pixel detector.

em - cheetah, retractable

Application

In practice, the Cheetah retractable detector is experimentally proven to be the ideal detector for low dose and fast applications, where high SNR is crucial especially on beam sensitive materials. The key scientists in protein crystallography[1], microED[2] and automated continuous rotation ED[3] have chosen the Cheetah detector for data acquisition in their ground-breaking research.

[1] E. van Genderen et al. Acta Cryst. A74, 709 (2018)

[2] M. Gemmi et al. ACS Cent. Sci. 5, 1315 (2019)

[3] S. Smeets et al. J. Appl. Cryst. 51, 1262 (2018)., H. J. (1982)

“The Timepix detector combined with continuous rotation electrondiffraction greatly improved the data quality and shortened thedata collection time from hours to minutes. Ab initio structuredetermination by electron diffraction has now become asfeasible as by X-ray diffraction, but from crystals thousands oftimes smaller than what are needed for X-ray diffraction.”

Prof. Xiaodong Zou, Department of Materialsand Environmental Chemistry at Stockholm University