Electron saturation current on a cylindrical probe in a magnetized rarefied plasma flow

A procedure for diagnosing a magnetized rarefied plasma using the electron saturation current on a cylindrical electric probe is developed. Approximate formulas and dependences of the electron saturation current on the angle between the probe axis and the external magnetic field induction vector and on the scale parameters of the probe current collection (the probe and near-electrode layer radii and the Larmor radius of plasma electrons) are obtained. It is shown that, at angles greater than $65^{\circ}$, the electron current on a cylindrical probe in a magnetized plasma is equal to the electron saturation current in the zero external magnetic field. The presented formulas and dependences make it possible to determine the parameters of electrons in a magnetized rarefied plasma flow using two output signals: the probe current and the probe potential.