Measurement of asymmetric optical pumping of ions accelerating in a magnetic-field gradient.
We report observations of asymmetric optical pumping of argon ions accelerating in a magnetic-field gradient. The signature is a difference in the laser-induced-fluorescence emission amplitude from a pair of Zeeman-split states. A model that reproduces the dependence of the asymmetry on magnetic-field and ion-velocity gradients is described. With the model, the fluorescence intensity ratio provides a new method of measuring ion collisionality. This phenomenon has implications for interpreting stellar plasma spectroscopy data which often exhibit unequal Zeeman state intensities.
Sun
Xuan
X
Department of Physics, West Virginia University, Morgantown, WV 26506, USA.
Scime
Earl
E
Miah
Mahmood
M
Cohen
Samuel
S
Skiff
Frederick
F