The soft x-ray transmission properties of thin polyamide windows and their application to future detectors

The x‐ray transmission properties of a very thin polyimide window in the range 7–310 Å have been investigated. The window is nominally 0.24 μm thick and is supported by a hexagonal polyimide grid. Transmission of over 60% and 80% at the oxygen Kα and carbon Kα lines, respectively, have been achieved. The use of such windows as the entrance window of a gas scintillation counter (GSPC) operating as a broadband spectrometer at XUV wavelengths is discussed. Overall detector efficiencies of greater than 10% for wavelengths less than 150 Å are possible to achiev