Calculations Useful in the Determination of Electron Temperature from X-Ray Continuum Radiation Emitted from High Temperature Plasmas

摘要

The results of calculations of the total integrated bremsstrahlung radiation passing through absorbing foils of beryllium, aluminum, and nickel (as well as aluminum and nickel in combination with carbon (polyethylene)) are presented for various temperatures and a range of useful thicknesses. Such information is necessary in obtaining values for the electron temperature in a plasma from measurements of the soft x-ray continuum emission. The spectral distribution of the transmitted radiation is also presented for use in determining the spectral region observed, thereby avoiding regions of undesirable radiation. An indication of an observable flux level in a typical experiment is given, along with equations suitable for scaling to other plasma conditions, as a further aid in selecting foils for a particular application. (Author)