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User name Yi Qiang
Log entry time 17:26:41 on May 12, 2009
Entry number 272719
Followups:
keyword=Field gradient testThe small gradient coil will create 30mG/cm dBz/dz gradient with 1A. I tested the field gradient by looking at the NMR frequency difference between pumping chamber and target chamber. So looks like the gradient without gradient coil presenting is really small, so we do need to turn it on to prevent the masing effect happening. We will try to use 0.7A in small gradient coil (~20mG/cm) for now.
No additional gradient
1A in small gradient coil
-1A in small gradient coil
