[3dem] Talos FEG Emission...

[duncan.sousa at rcn.com]

Dear 3DEM, 


I'm working on a Talos and the FEG emission history is highly inconsistent and currently lower than I'd like for single particle data collection on a Falcon II camera. I'm hoping FEI Talos owners would be willing share with me their FEG emission levels. I'd also like to know what dose rate you can achieve under parallel illumination conditions at your preferred data collections: gun lens, spot size, extraction voltage, etc. 



The values I'm seeing are ~30-45uA and under parallel conditions it's difficult to achieve better than 10 e-/Ang per second with spot size 3 or greater. 



Kind Regards, 
Duncan 




Duncan Sousa, PhD 
Johns Hopkins University 
School of Medicine 
725 N. Wolfe Street, Hunterian 716 
Baltimore, MD 21205-2185 
1-410-614-1335 
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