This plug-in shifts (wobbles) the spectrum on the detector during the SI data acquisition. The spectrum will be accumulated after adjusting the spectrum shift to reduce the channel gain/dark current variation.
DISCLAIMER: Please use this plug-in entirely at your own risk. We will not accept any responsbility for any losses or damage which may arise from its use.
Spectrum Wobbler plug-in is provided by HREM Research Inc. and freely downloaded.
Copy the files to DM Plug-Ins folder, and then launch the DM again.
- The Spectrum Wobbler will appear in the sub menu of Floating Windows under Window menu.
- Select the Spectrum Wobbler from the Floating Windows sub menu to open the tool palette.
- Start the Spectrum Wobbler before acquiring an SI data, and stop the Wobbler after data acquisition.
- The obtained spectrum should be adjusted by yourself using cross-correlation of the spectrum feature or the zero-loss shift of the low-loss spectrum in the case of DualEELS.
Step: a small fraction of channel energy width (dispersion)
(e.g. 0.2 x channel energy width)
NOTE: Since the energy shift will occur asynchronously with the SI data acquisition, we cannot control an energy shift timing. Therefore, the energy scan step should be a small fraction of an energy dispersion not to degrade an energy resolution.
Interval: close to an exposure time of the spectrum
Range: close to (channel energy width) x (number of channels to be averaged)
(e.g. channel energy width x 50)