Programmable STEM with EDM Synchrony

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Programmable STEM with EDM Synchrony

Control the dose at every pixel.

The Electrostatic Dose Modulator (EDM) is a fast beam blanking system with a pre-sample electrostatic deflector, including electronics and software control. EDM can also attenuate electron illumination without affecting imaging conditions, giving TEM and STEM users more control over the dose on their samples.

The optional Synchrony upgrade takes EDM's timing and synchronization capabilities to the next level. Synchrony can coordinate with a STEM controller, tracking the probe beam location as it scans across the sample. EDM's lightning-fast electrostatic blanking turns the beam on for a specified time at each pixel, or keeps the beam blanked to completely exclude sensitive regions from dose.

Synchrony Features

  • Programmable dose at each STEM pixel with arbitrary patterns

  • Excellent dose contrast between neighboring pixels

  • Exclude dose on regions of interest with any shape

  • Preview the dose pattern and align to sample structures

  • Automation-friendly workflow

  • Synchronize to other accessories


Synchrony Capabilities

Parameter Available Settings Min. Max.
Pixel dwell time Resolution 10 ns 2 μs 167 ms
STEM resolution Set by STEM controller 1 x 1 pixels 4,096 x 4,096 pixels
Gray levels Adjust dose time in 10 ns
(for shortest dwell time)
(for dwell time > 41 μs)
STEM controller JEOL AIP (for other STEM controllers, inquire
Control interface Software GUI, REST automation server

Targeted dose to sample features

The user-friendly Synchrony Dose Painter software makes it possible to customize the dose pattern for each sample. Left: The user paints a custom dose pattern (green) overlaid with a preview image of the sample.
Synchrony refers to this pattern to apply dose the sample, similar to the example above. Right: STEM measurement with the user's Synchrony dose pattern applied. Images courtesy of The Rosalind Franklin Institute, UK.

Targeted dose to sample features

Applicable models:


Related Products


Installation Examples