Raith Status 1730 hours Friday March

[James Conway]

Greetings:

System has been working well through the afternoon.  NO operations above 
10 keV.  All resist must be baked at temperatures above 140 C.  Please 
see me if you have any question.

Users, particularly those not experts at SEM operations, may experience 
some difficulties achieving good focus or stigmation initially.  My 
suggestion is to say yes to the standard settings for 5 mm that I saved 
earlier today and will update again on my session coming up at 1800 
hours today.  If you encounter difficulties -- return to larger features 
re-focus and stigmate, and then move in three progressions to smaller 
and smaller features, carefully adjusting stigmation as you increase 
magnification.
The mixture of latex spheres on the load station are very good features 
for this.

 Users are also reminded that much less translation will be needed to 
the mouse  controls to achieve suitable focus and stigmate because after 
the PM was done less current is needed to achieve acceptable stigmation. 
Remember: Move the controls very slowly allowing the monitor to update 
as it scans across the sample. Reduced raster works best for this.

A slight shift can be seen changing from Mag amplifier 1 to 2 but should 
not affect your write field alignment as that it is done in Mag. range 2 
for most writefield sizes.

Please feel free to call me if you encounter problems or have any concerns.

Leo will return for final tweaking on Monday at a time to be determined 
and it is hoped that we can progress to 20 keV writes early next week.