Precession of Magnetization

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Precession of Magnetization
Bo
dM
wogB0
M
Precession of M about B
Is there precession at equilibrium?
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Laboratory frame
Rotating frame
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NMR experiment in laboratory frame
Bo
wogB0
M
z
x
y
Detection coil
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NMR experiment in laboratory frame
Bo
x
M
B1
M
rf pulse
B1
z
x
y
Detection coil
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Experiment sensitivity to a
Bo
M
a
B1
z
Mxy
x
y
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Experiment sensitivity to a
Bo
M
a
z
Mxy
x
y
What value of a gives greatest signal?