Comment lampoly SNF 2010-09-23 16:24:45: Tune/Load presets

mtang at snf.stanford.edu mtang at snf.stanford.edu
Thu Sep 23 16:24:46 PDT 2010


We swapped upper and lower RF power supplies during the course of troubleshooting unstable ICP power.  The stability problem appears to have resolved.  Moreover, the lower RF power is better tuned and more stable than before (HALO supply??)  I adjusted the tune and load presets (only slightly) on the following (upper and lower RF):
Recipe 1/2: 
- Step 3 - 28000/14000; 7000/9500
- Step 5 - 25000/23000; 7000/9500
- step 7 - 22000/27000; 7000/9500
Recipe 25:
- Step 3 - 28000/14000; 7000/9500
- Step 5 - 25000/20000; 7000/9500
Recipe 90:
- Step 3 - Same as above
- Step 5 - 24000/22000; 7000/9500
- Step 7 - 22000/24000; 7000/9500
The presets are not too different than they have been for the last few days, but still very different from where they were a few weeks ago and a couple of months ago, esp. for the tune.




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