Learn to do STEM or TEM/STEM...

This guide assumes you are familar with conventional TEM alignment. If not, read the TEM introductory guide

1. The ray diagram: A simple diagram
2. The Ronchigram
: Also known as the shadow image, and the Gabor hologram, understand this strange mode.
3. The objective pre-field: a more detailed look at the lens configuration in STEM mode
4. Pivot points: The beam should not tilt while in STEM mode
5. Align the detectors: understand all the things that can go wrong!
6. CM20 series TEM/STEM
: My alignment strategy for this machine

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Alphabetical list of subjects

These links point to the page where the term is first introduced...

• alignment (general)
• alignment coils
• align STEM detectors
• aperture mechanism
• astigmatism
• beam stopper
• bias
• binoculars
• brightness
• CCD camera
• cold finger
• coma-free axis
• computer control
• condenser aperture
• condenser astigmatism
• condenser system
• current centre
• deflection coils
• differential pumping aperture
• diffraction lens
• diffusion pump
• diffraction lens and diffraction mode
• diffraction mode
• double deflection coils
• emission
• eucentric height
• exposure meter
• filament
• filament saturation
• fine focus
• focus
• focus diffraction pattern
• focus step size
• Fraunhofer diffraction
• Gausian focus
• getter
• gun
• gun align
• gun shift
• gun tilt
• gun tilt (advanced)
• High tension
• high vacuum pump
• HT
• intensity
• intermediate lens
• ion pump
• magnification
• multifunction knobs
• objective focus
• objective lens
• optic axis
• optical analogue
• over-focus
• Pirani gauge
• pivot points
• pivot points in STEM mode
• photographic film
• projector system
• pure shift
• pure tilt
• reversal centre
• ring of infinite magnification (radial, azimuthal)
• riot act
• rocking point
• Ronchigram
• roughing manifold
• rough pump
• rule of rays
• saturation (filament)
• selected area aperture
• shadow image
• shift purity
• shift-x (electrical shift)
• shift-y (electrical shift)
• specimen height
• specimen shift
• specimen loading
• spreading the beam
• spot size
• stigmator sensitivity
• tilt purity
• trap
• turbo pump
• turn off the beam
• turn on the beam
• twin objective lens
• UHV
• under-focus
• vacuum gauges
• voltage centre
• weak lens
• z-shift

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Copyright J M Rodenburg