Celeritas
Orders of magnitude faster than other detectors (up to 87,000 fps)
1k x 1k (1 million) seamless pixels for a broad range of TEM/STEM methods.
On-chip CDS minimizes noise.
Simultaneous HDR readout delivers more than an order of magnitude higher dynamic range.
Patented HDR counting automatically performs electron counting in sparse regions while maintaining linearity in bright regions.
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Unique Readout Architecture to Maximize Speed
Conventional CMOS image sensors(including both scintillator-coupled cameras and direct detectors) output each frame as a series of rows, read out from top to bottom. While this strategy is simple it results in limited output speed, especially for smaller ROIs. At best, the frame rate can scale with the Y dimension.
The Celeritas sensor is seamlessly segmented into quadrants, operating in parallel and read out from the center of the sensor. This advanced architecture enables ultra-fast output, scaling with ROI in both the X and Y directions.
| Specifications | ||
| TEM electron energy | sensitive to 60 keV - 1.25 MeV │ optimized for 200 - 300 keV | |
| pixel array size | 1024 x 1024 (1 million pixels) │ 15μm pixel pitch | |
| single electron SNR | >50:1 (200-300 keV) | |
| sensor design | custom-designed ultra-fast DDD sensor on-chip correlated double sampling (CDS) │ backthinned │ radiation hardened | |
| acquisition modes | integrating mode │ electron counting mode HDR counting mode (US patent #11,252,339) | |
| exposure rate | up to 107e-/pixel/second (300 keV, with selectable gain or simultaneous HDR) | |
| TEM compatibility | all major TEM manufacturers & models │ DE-FreeScan requires STEM capability | |
| mounting position | fully retractable │ compatible with a wide-range of TEM configurations typically in TEM bottom port, pre- or post-energy filter, or in JEOL film drawer | |
| sensor protection | sensor protection shutter │ TEM blanking/shuttering │ failsaft software | |
| computer system | high-performance computer │ Windows 10 │ Nvidia GPU(s) │ up to 55 TB storage | |
| image format | non-proprietary │ HDF5, MRC, TIFF, or TIFF LZW compatible with ImageJ, LiberTEM, Hyperspy, Py4DSTEM, etc. | |
| automation software | SerialEM │ open API for custom integrations (with Python, C, C++, C#, etc.) | |
| integrations | CEFID post-column energt filter (CEOS) │ precession diffraction (Nanomegas) | |
| scan control | DE-FreeScan scan controller (also includes 4 analog detector inputs) hardware synchronization signal (BNC) │ selectable as either input or output | |
