Cheetah Detectors Camera for TEM ED
Chee-tah：High performance detector for TEM ED applications
ASI’s Chee-tah is a hybrid pixel detector suitable for electron microscope applications. The Chee-tah’s sensitivity and speed offers unprecedented possibilities for electron diffraction, imaging and tomography.Each pixel is connected via bump-bonds to the readout electronics integrated in the chip below the sensor. The electronics in a pixel processes the signals from the sensor. An individual pixel counts the number of detected events in the corresponding area.Scintillated detectors don’t have the signal to noise ratio’s that can be obtained with the Chee-tah. Other direct electron cameras lack the dynamic range the Chee-tah has and are often too beam sensitive to be used for diffraction experiments. The Chee-tah’s high speed makes it ideal for looking at dynamic processes and catching fast fading signals.
Advantages of our detector
- ASI’s novel ultra sensitive detectors provide a solution to study micro- and nano-sized crystals by electron diffraction and can be mounted under existing electron microscopes. The high sensitivity together with a high-speed readout and high dynamic range allows users to collect data far beyond the limits set by CCD and CMOS cameras. For (4D) STEM applications this means quick scanning of large areas.
- Our versatile design makes our detector backward compatible with almost any electron microscope and can be further adjusted to the users’ demands.
- X-ray crystallography is the most common method for determining the atomic structure of proteins and other beam sensitive materials. To obtain high-resolution X-ray data macroscopic crystals are needed.In many cases however it is only possible to grow micro- or nano-sized crystals. Recent results demonstrate that micro- and nano-sized crystals can be studied using electron diffraction, yet the materials’ sensitivity to radiation remains a bottleneck.
Advantages Hybrid Pixel Detector
- Direct, single photon detection
- Excellent point spread function
- Zero noise (> 3 keV)
- Short read out time and high frame rates
- ncreased high energy efficiency with high Z material sensors
- Modular detectors enabling large area detectors
Applications
- Energy resolved X-ray
- Computed tomography
- Fast product-line X-ray inspection
- Electron microscopy
- Mass spectrometry
- Single photon imaging
- Lon and electron imaging
Main product specifications for electron microscopy
|
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Chee-tah120 Timepix |
Chee-tah1800 Medipix3RX |
Chee-tah (event) Timepix3 |
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Pixels(55um) |
512 x 512 / 1k x 1k |
512 x 512 / 1k x 1k |
512 x 512 |
|
Sensitive Area |
2.8 x 2.8 / 5.2 x 5.2 cm |
2.8 x 2.8 / 5.2 x 5.2 cm |
2.8 x 2.8 cm |
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Max Speed |
120 Hz |
1750 / 425 Hz |
1.6 ns |
|
No. Of thresholds |
1 |
1or2 |
1 |
|
Counter Depth |
13.5 bit |
12/24 bit |
14 bit |
|
Sensors |
Si, GaAs,CdTe |
Si, GaAs,CdTe |
Si, GaAs,CdTe |
|
Connection |
1 GB / 4 x 1 GB Ethernet |
10 GB Ethernet |
10 GB Ethernet |
|
Operation |
Counting, TOA, TOT |
Counting, CSM |
Simultaneous, TOA, TOT |
ASI Ltd in the Netherlands also supply TPX3Cam which is a fast optical camera for time stamping of optical photons. It is based on a new silicon pixel sensor, which in combination with the Timepix3 ASIC and readout, is suitable for a wide range of applications which require time-resolved imaging of electrons, ions or single photons. And ASI's LynX series is a hybrid pixel Detector suitable for X-ray detection, imaging and tomography applications. Please see the LynX family of hybrid pixel detectors.
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