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VERSION:2.0
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PRODID:UW-Madison-Physics-Events
BEGIN:VEVENT
SEQUENCE:1
UID:UW-Physics-Event-8269
DTSTART:20230511T140000Z
DTEND:20230511T160000Z
DTSTAMP:20260414T033317Z
LAST-MODIFIED:20230508T144607Z
LOCATION:5310 Chamberlin or  https://uwmadison.zoom.us/j/99152299154?p
 wd=TTFQWkxzbGpvRjMvS3pGOVVZYXc2dz09
SUMMARY:New Approaches to Transverse NMR Gyroscopes\, Graduate Program
  Event\, Susan Sorensen\, Physics Graduate Student
DESCRIPTION:In this thesis\, I describe three approaches to the contin
 uous operation of a transverse spin-exchange optically pumped NMR gyro
 scope. I demonstrate the simultaneous\, continuous excitation of $^{13
 1}$Xe and $^{129}$Xe using first modulations of the optical pumping (p
 olarization modulation\, PM)\, then using modulations of the applied b
 ias field (pulse density modulation\, PDM)\, and then using a combined
  approach that includes both polarization and field modulations (hybri
 d operation). I describe the theory behind the operation of the device
 \, and the apparatus used to perform the experiments presented in this
  thesis. I then present results for each of the three operation modes 
 - PM\, PDM\, and hybrid operation. For each\, I give several key perfo
 rmance metrics\, including linewidth\, signal-to-noise ratio\, field s
 uppression factor\, cross talk\, angle-random walk\, and bias instabil
 ity. The field suppression factor and cross talk are unique metrics wh
 ich have generally been ignored in this field of study. This thesis in
 cludes the best bias instability ever measured with this device\, at $
 \\sim$420~nHz. I close with a comparison of the three methods and a di
 scussion of proposed future works.
URL:https://www.physics.wisc.edu/events/?id=8269
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