Draw the position of the magnetization vector

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Reference no: EM133340262

Question 1. Using the vector diagram provided, draw the position of the magnetization vector after the following pulses assuming equilibrium prior to the pulse. Also draw the position of the B1 vector causing the rotation.

2183_vector diagram.jpg

 

a: 90y (90 degree about Y axis)

b: 180x (180 degree about X axis))

c: 60x (60 degree about X axis)

Question 2. Most pulses have slight errors. For example a nominal 180 pulse may actually be 170 degree.

a. Assuming equilibrium prior to the pulse show the position of the magnetization vector AND calculate and show the projection onto the X axis AND the projection onto the Z axis after a 170y pulse: (calculate means provide a decimal fraction of the original starting magnetization)

b. Repeat part a above but for a 170y pulse:

39_vector diagram1.jpg

 

c. Co-adding the results from pulses that have different phases is called phase cycling. Add the results from part a and part b.

1068_vector diagram2.jpg

 

d. the co-adding you did in part c is a component of many phase cycles. Please comment on its utility - that is, what does it accomplish?

Reference no: EM133340262

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