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September 2007

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Subject:
From:
John Fournelle <[log in to unmask]>
Reply To:
JEOL-Focused Probe Users List <[log in to unmask]>
Date:
Wed, 5 Sep 2007 13:22:49 -0500
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*

I have found that when I image a recently failed W filament, it 
appears hollow where it failed (these are gently used filaments, with 
months and months of service). I have placed 6 images on a web page 
for you to view if interested. I would be interested in comments how 
this phenomenon occurs.

www.geology.wisc.edu/~johnf/filament.html

Thanks

John F
-- 
========================================================
John Fournelle, Ph.D.	       office: (608) 262-7964   cell: (608) 438-7480
Cameron Electron Microprobe Lab   lab: (608) 265-4798
Dept of Geology & Geophysics      fax: (608) 262-0693
University of Wisconsin          home: (608) 274-2245
1215 West Dayton St.            email: [log in to unmask]
Madison, WI 53706		amateur radio: WA3BTA
      Personal    http://www.geology.wisc.edu/~johnf/
      Probe lab   http://www.geology.wisc.edu/~johnf/sx51.html
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"The first rule of all intelligent tinkering is to save every cog and 
wheel." --  Aldo Leopold

"For a successful technology, reality must take precedence over 
public relations, for Nature cannot be fooled."    --   Richard P. 
Feynman

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