
244 Handbook of Magnetic Measurements
excited by the alternating current. The damping of vibra-
tion (its amplitude) depends on the external magnetic
eld. This amplitude is measured using the diode laser
beam reected from one end of the bar (Givens et al. 1996).
References
Acker F.E., 1971, Calculation of the signal voltage induced in
a toroidal proton precession magnetometer sensor, IEEE
Trans. Geosci. Electron., 9, 98–103.
Acuna M.H., 1974, Fluxgate magnetometers for outer planets
exploration, IEEE Trans. Magn., 10, 519–523.
Acuna M.H., Pellerinn C.J., 1969, A miniature two-axis uxgate
magnetometer, IEEE Trans. Geosci. Electron., 7, 252–260. ...