Leginon Operation for JEM scopes¶

The Use of JEM scopes with Leginon is still under development but here are some modification specific to them that we use.

"image beam shift" on JEOL scopes is equivalent to "image shift" applied by the users on FEI instrument¶

Such movement should move feature in the view without induced movement of the beam.

Some model has such a slower relax time in image shift in LOWMAG range that it is necessary not to access it in target adjustment.¶

An additional targeting/imaging step is added so that queued up exposure targets will not be adjusted using sq preset.
Alternatively, custom lens program can be created to replace an unused MAG1 magnification that minimize the objective lens current change. See JEOL installation specifics