Magnetic Electron Deflection Tube

The deflection tube described here is used to harden the electron output spectrum of the Febetron 705 Flash X-ray (FXR) machine. The deflection tube is intended for use when performing electron-beam transient radiation effects on electronics (TREE) experiments. High-energy-electron dose rates in silicon are variable from 109 to 3 × 1010 rads(Si)/sec. A magnet is used to deflect all low-energy (E < 0.5 Mev) electrons out of the horizontal electron beam. The remaining high-energy electron spectrum can be used to irradiate test samples with more uniform dose-depth profiles in the test sample. More than 99.9 percent of the electrons are returned to the FXR machine via the deflection tube walls, thereby satisfying an operational requirement of the Febetron.