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Lena/Sep 2016: Difference between revisions
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→Fundamental noise limit estimates
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Finished the Mathematica models of the Mx in coated cell, SERF with buffer gas and SERF with OTS coating + 30 Torr Ne magnetometers. The models estimate the best achievable performance of each magnetometer in perfect circumstances (taking into account probe and pump de-pumping). Each magnetometer has a cubic cell of 1x1x1 cm. The magnetometer ranking by sensitivity is (best to worst):
# SERF + OTS coating (0.1 fT/sqrtHz)
# SERF + 200 Torr Ne + 30 Torr N2 (0.5 fT/sqrtHz)
# Mx with paraffin coating (1.5 fT/sqrtHz)
Mx magnetometers don't achieve high sensitivity because they have lower alkali vapor concentration (can't heat coating above 60°C), and radiation trapping (no N2 in the cells). The SERF with OTS coating has narrower zero-field resonance line, so the probe can be detuned much closer than in the magnetometers with buffer gas. They also run at lower temperatures and so they have
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