Abstract:
A portable x-ray source that produces a sufficient x-ray flux (x) to produce high quality x-ray images on x-ray films. The source includes a vacuum chamber (20) filled with a heavy atomic weight gas at low pressure and an x-ray emitter (30). The chamber (20) is in a magnetic field and an oscillating electric field and generates an Electron Cyclotron Resonance (ECR) Plasma having a ring of energetic electrons inside the chamber (20). The electrons (64) bombard the x-ray emitter (30) which in turn produces x-ray. A pair of magnetic members (61, 62) generate an axisymmetric magnetic mirror trap inside the chamber (20). The chamber (20) may be nested within a microwave resonant cavity (10) and between the magnets (61, 62) or the chamber (20) and the microwave cavity (10) may be a single composite structure.
Abstract:
An X-ray source that produces X-rays as a result of igniting an electron cyclotron resonance plasma inside a vacuumated dielectric spherical chamber (11) filled with a heavy atomic weight, non-reactive gas or gas mixture at low pressure. The spherical chamber is located inside a non-vacuumated microwave resonant cavity (13) that is in turn located between two magnets (32, 33) to form a magnetic mirror. Conventional microwave energy fed into the resonant cavity ignites the plasma and creates a hot electron ring which electrons bombard the heavy gas and dielectric material to create an X-ray emission. The X-ray source is suitable for surface and volume sterilization of foodstuffs, packaged goods, medical supplies, blood products and other materials and medical diagnostic and therapeutic devices such as tomography, mammography and radiology.
Abstract:
Apparatus and methods for submicron lithography of semiconductor materials, circuits and other objects. A source (10) of multiply charged ions (2) is applied to a thin layer of electrically conductive material (54). The recombination of ions and free electrons in the layer produced soft x-ray radiation which is used to irradiate an object (50). The object may include a semiconductor substrate, an x-ray sensitive resist, and an x-ray absorbing mask for forming semiconductor devices. The soft x-rays are produced by careful selection of the type and energy of multiply charged ions and the thickness of the thin electrically conductive layer, which may be a light element metal.