Rayex proposes to develop a rotating anode x-ray tube which will have unique design features such that its power and duty cycle capabilities will be increased by at least a factor of two over present-day tubes including micro-focus tubes. The tube will be sealed and self-contained with no external pumping, and will have a practical size such that it can be retrofitted to present-day x-ray scanning and computer tomography devices. With the addition of other design features in a phase ii program, the potential power enhancement of the tube is expected to be a factor of ten.