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.

Features at a Glance

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

Align to sample structures

Automation-friendly workflow

Synchronize to other accessories

Synchrony Capabilities

ParameterAvailable SettingsMinMax
Pixel dwell timeResolution 10 ns2 μs167 ms
STEM resolutionSet by STEM controller1 x 1 pixels4096 x 4096 pixels
Gray levelsAdjust dose time in 10 ns increments190 (for shortest dwell time)4096 (for dwell time > 41 μs)
STEM controllerJEOL AIP (for other STEM controllers, inquire
Control interfaceSoftware GUI, REST automation server
Applicable Models

Arbitrary dose patterns

This data shows the exquisite control achieved by Programmable STEM with EDM Synchrony.

(Left) User-defined test pattern with a variety of high-resolution features. The gray level in each pixel tells Synchrony how long to expose. This test pattern was used during a scan of Au nanoparticles using a JEOL GRAND ARMTM2 TEM, resulting in a modulated bright-field image (Right). The nanoparticles are clearly visible, as are the logo graphics, the test patterns, and the photograph of the TEM from the modulation image. Images courtesy of The Rosalind Franklin Institute, UK.

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.