Difference between revisions of "NMR Measurement"
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==Principle== | ==Principle== | ||
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==Basic Instrumentation for NMR system== | ==Basic Instrumentation for NMR system== |
Revision as of 12:04, 19 August 2008
Principle
coming soon... <math>\frac{\phi}{\theta}</math>
Basic Instrumentation for NMR system
Procedure
Field Sweep for 3He cell 1) Open the NMR_fieldSweep_v?.vi (current version is v7) 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