Observables2

Azz is an asymmetry so take advantage of numerator denominator systematics cancellation:

1.) Measure Np and Nu with same cup same exact material 2.) Use same B-field 3.) Use NMR on both to measure polarization and un-polarization 4.) Let beam heating an off larmor microwave control un-polarization 5.) Keep both cold (~1K) 6.) Switch from pol to unpol frequently