View source for Howto test a cell

1) RTDs:
     - Test the target RTDs and the oven RTD at room temperature against a thermometer. 
     - Record their offsets.
     - Discard RTDs with significant offsets.
     - Place selected RTDs on the cell.

2)  Installation of the cell in the oven:
     - Center the pumping chamber with respect to the oven windows.
     - Seal the oven with RTV.
     - Record position of the cell with respect to the pick-up coils for flux calculation purpose.

3) Laser alignment:
     - Check laser alignment (and light loss) at each optical element.
     - Check 1/2 and 1/4 wave plates settings.
     - Check the spectrum analyzer for optimal absorption.

4) Cell testing:
     - Set up the oven at the desired temperature. Wait for the temperature to stabilize.
     - Turn on the lasers. Wait for the temperature to stabilize.
     - Take NMR measurement every 3 hours.
     - When spin up is done, do the following tests:
              - EPR-NMR calibration: take EPR and NMR measurements 5 minutes apart following this sequence: EPR-NMR-EPR-NMR-EPR
              - temperature test: take NMR measurements with lasers on and off following this sequence: ON-OFF-ON-OFF-ON. Before each measurement, make sure the cell temperature is stable.
              - AFP loss test: take 5 NMR measurements 5 minutes apart.

5) Spin down:
     - Turn off the laser and the oven. Wait for the temperature to stabilize.
     - Take NMR measurement every 3 hours.