NMR Measurement

Principle

coming soon...

Procedure

 Field Sweep for 3He cell

1)  Open the NMR_fieldSweep_v?.vi (current version is v11)
2)  Click the run button on the left top of the window (under the menu bar of the window you just opened).
3)  On the right side of the window, make sure the option button is on the "Helium" position.
4)  Click "Load Default" button to load the default values of the parameters.
5)  In most cases, you do not need to change any default setting EXCEPT the phase in the "Lock-in Settings" part.
    To determine the phase, you can follow the steps below. You can also jump to the next step and come back later.

      What you need to do is try a random number in the range from 0 to 180 and do a sweep first. Then from the
      height of the peaks in "Lock-in X Channel" and "Lock-in Y Channel" you get get some idea that
      what the phase should be. Change it and do another sweep. Check the result and make sure all signals go
      into X chennel and there is almost nothing in Y channel compared with X channel. You can try several
      times til you get satisfied signal.

6)  Make sure the "Wait Time" is 20 minutes.
7)  If you have set the phase right, select enable the "Save Data" option button. If you haven't, disable it.
8)  Click "Start" button. Then you start the field sweep.

 Frequency Sweep