Dispersive ionization chamber for thickness measuring unit of determination device for determining thickness of zinc layer of strip steel, has ionization spaces that are arranged one behind another along beam propagation direction

摘要

The ionization chamber (60) has an ionization chamber portion (70) that is provided with ionization spaces in which several electrodes (62) are provided. A window (72) is provided through which radiation is occurred. The ionization spaces are arranged one behind another along the beam propagation direction, such that low-energy radiation which is nearer to window is absorbed statistically in ionization spaces and high-energy radiation which is far away from window is absorbed statistically in ionization spaces which are filled with noble gas. Independent claims are included for the following: (1) a zinc layer thickness determination device; and (2) an iron layer RMI TTL device.