Broad width should give you lower amplitude

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User name Yi Qiang

Log entry time 00:18:42 on December 08, 2008

Entry number 252473

This entry is a followup to: 252467

keyword=Broad width should give you lower amplitude

From the field drifting plot, the NMR width is broadened by about 3%. Naively speaking, if assuming a constant polarization, one may expect the integral of the NMR peak to be constant since it's for the total population of 3He atoms. Therefore, this change will roughly bring a 3% decrease in the NMR peak amplitude (height) which is used for our online polarization calculation. This may partially explain the "dropping" of the polarization after the HRS polarity change. An EPR measurement is needed to verify this idea.

A copy of this log entry has been emailed to: jiang, jpchen, zhangyi,tdaver@wm.edu, jinhuang,chiran