Au foil testing

Move to Au foil reference on Cu sample
Good Auger Au 74, 164, 243 peaks, very weak at 2022 peak, probably due to weak excitation at 3 kV

Try 10 kV, large Octo offset to maximize at 2000 V, octo (50,66) instead of (50,50), now 2 kV peak/background is 11.5 % for 280 kHz at 3 nA aperture, was << 1% at 3 kV

Also 3 nA gun align way off at 10 kV, optimized near (-62,-68)
Max 10 kV gun (-48,-58), current ~ 9x greater

Try full scan this fixed Octo, weird below 1 kV

Optimize 2 kV (50.66)
Optimize 1 kV (50,56) repeat
optimize 500 eV (46,54) repeat, still OK up to 2.2 kV
optimize 250 eV (44.7.51.8) repeat,  OK from ~ 155
optimize 120 eV (43.2.51.0) repeat,  OK from ~ 155
optimize 50 eV (50.2.48.8) repeat,  worse, poor results below 250 eV, 120 opt better, fine above 1 kV
optimize 90 eV (47.6,47.7) strange, worse LV than opt at 250...OK about 700...

repeat 90 V opt with CRR instead of CAE, different results....still below