X-ray generation from large area carbon-based field emitters

In addition to displays, sensors, and microwave amplifiers, field emitters are being considered for x-ray generation. Published results describe carbon nanotube-based emitters nanocrystalline graphite, and silicon emitters [2] intended for relatively small size applications such as in catheters for restenosis treatment in cardiac arteries and for cancer therapy. Larger x-ray sources are??also of great interest. for food sterilization, waste water treatment, homeland security, and others. By using carbon-based emitters similar to those described in, we are investigating xray sources with total emission areas approaching square meter sizes.