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Spectra Ultra
TEM InstallingThermo Fisher Scientific — Spectra Ultra
Next-generation double Cs-corrected S/TEM with X-FEG-Ultimono source, featuring sub-ångström resolution and ultra-high energy resolution EELS for advanced materials characterization.
Voltage 30/60/200/300 kV
Gun X-FEG
Monochromator Ultimono (0.025 eV)
Pole-piece S-twin Prime (5.4 mm)
Correction TEM (CETCOR) + STEM (S-CORR)
TEM Resolution 60 pm
STEM Resolution 50 pm
EELS Resolution 0.025 eV
EDS UltraX (4.04 srad)
STEM Detector 16-segment (Panther)
Tilt ±35°/±35°
Installed 2025–2026 (under installation)
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Overview
The Thermo Fisher Scientific Spectra Ultra is a state-of-the-art double aberration-corrected S/TEM equipped with an X-FEG-Ultimono electron source. It delivers 60 pm TEM imaging resolution, 50 pm STEM resolution, and an unprecedented 0.025 eV energy resolution for EELS — enabling atomic-scale imaging and spectroscopy of the most challenging materials.
Key Features
- Double Cs-correction: Both TEM (CETCOR) and STEM (S-CORR) aberration correctors for sub-ångström imaging in all modes
- X-FEG-Ultimono source: Ultra-high brightness with monochromated energy spread of 0.025 eV
- Panther 16-segment STEM detector: Advanced segmented detector for differential phase contrast (DPC) and integrated DPC (iDPC) imaging
- UltraX EDS (4.04 srad): Next-generation EDS geometry for high-throughput elemental mapping
- Multi-voltage operation: Flexible acceleration voltage from 30 kV to 300 kV for beam-sensitive and bulk materials
Applications
- High-resolution imaging and EELS of energy storage materials
- Atomic-resolution EDS/EELS mapping of interfaces and defects
- Low-voltage imaging of beam-sensitive materials (polymers, solid electrolytes)
- 4D-STEM and differential phase contrast imaging