Compact X-ray Tube with Carbon Nanotube Cathode

MPT proposes to construct a simple electron beam analyzer specifically for measuring the angular dispersion of the emitted electrons. With this information in hand we will then make the required adjustments in our simulation software to set the initial conditions for electrons emitted for CNT cathodes. We will then use computers to investigate candidate electrode configurations for electron guns and x-ray tubes that will provide convergent beams that can be focused to a fine spot. A model will be built to validate the computer simulations. We intend to continue this work into Phase II to develop a miniature X-ray tube operating at 40kV to 60kV with 2 Watts or more of beam power that is focused to produce a spot less than 20um in diameter. Microwave Power Technology has been researching cold cathodes and developing vacuum electron devices using carbon nanotube cathodes for 5 years. We have developed an X-ray tube that is currently being produced for hand held x-ray fluorescence spectrometer. Cold cathodes can be hard mounted to the structure of any vacuum electron device thereby reducing the part count and improving the robustness compared to devices using thermionic cathodes. Ruggedness, efficiency and projected long life make CNT powered vacuum electron devices ideal for space travel and employment in space and lunar based applications.