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    User name Chiranjib

    Log entry time 11:29:29 on December 13, 2008

    Entry number 253217

    keyword=NMR frequency / field sweep cross calibration

    A cross calibration of the field and frequency sweep is performed before we switch to the vertical field configuration from the transverse field configuration. The measurements are performed accordingly as follows::

    First NMR frequency sweep ___________________________

    Laser = OFF Holding Field = Transverse - Target position = he-3 RF = Longitudinal PC pick up coil = Vertical signal = 19mV / 18.5 mV Calibration constant used = 2.99% /mV Polarization = 56.06 % **********************************************

    NMR field sweep ________________________

    Laser = OFF Holding Field = Longitudinal + Target position = pick up coil RF = Vertical PC pick up coil = Transverse signal = 120mV / 118 mV Calibration constant used = 0.244% /mV Polarization = 58%

    **********************************************

    First NMR frequency sweep ___________________________

    Laser = OFF Holding Field = Transverse - Target position = he-3 RF = Longitudinal PC pick up coil = Vertical signal = 17.5mV / 17.5 mV Calibration constant used = 2.99% /mV Polarization = 52.36 % ***********************************************



    A copy of this log entry has been emailed to: jpchen,yqiang