Skip to main content
. Author manuscript; available in PMC: 2014 Jun 27.
Published in final edited form as: J Magn Reson. 2010 May 31;205(2):202–208. doi: 10.1016/j.jmr.2010.04.015

Fig.3.

Fig.3

Effect of pre-emphasis on the magnetic field instability. An improvement in magnetic field stability by pre-emphasis of the current waveforms driving the field-cycling coils was observed. (A) No correction applied (B) Pre-emphasis based on a first order differential equation fit of the instability (C) Pre-emphasis based on a second order differential equation fit of the field instability. The magnetic field variation was detected by a gauss meter placed at the center of the magnet. The y-axis shows the measurements recorded on the oscilloscope that was connected to the gauss meter (1 mV = 1 G)