Problem raith SNF 2010-09-19 15:43:49: Faraday cup and WD

arkam at snf.stanford.edu arkam at snf.stanford.edu
Sun Sep 19 15:43:50 PDT 2010


1. The faraday cup on holder is not measuring current properly---I have to go to the farday cup on stage....
2. The WD is behaving funny--I put WD=5 in raith--but when I tried to focus+ stigamte--the WD in SEM went back to 3---
and then after proper focusing and stigmation the WD reads 2.6mm--generally it reads 4.9-5.1 mm...
Not sure what is the rpoblem--but with 2.8mm WD I can shoot pretty good dot---




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