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User name Yi Qiang
Log entry time 19:03:32 on April 24, 2009
Entry number 267970
keyword=Absolute field ftrength is calibratedI used NMR Field sweep calibrated the field strength at the up stream
target chamber: see Figure 1. 90.72kHz->28G
Then I set the field to 25Gauss using this calibrations.
The Strength at the pumping chamber is slightly lower than target
chamber,(about 0.4% lower according the NMR field sweep result), and the
following Frequency sweep and EPR measurement verified this:
NMR frequency sweep -> 80.8kHz -> 24.94 Gauss
EPR -> 24.925 Gauss
Figure 1
Figure 2
Figure 3
