Apparatuses and methods for generating distributed x-rays in a scanning manner

US9991085B2 · kind B2 · utility

Assignees

• TSINGHUA UNIVERSITY · CN
• NUCTECH COMPANY LIMITED · CN

Inventors

• Yuanjing Li · Beijing, CN
• Yaohong Liu · Beijing, CN
• Jinsheng Liu · Beijing, CN
• Huaping Tang · 安丰镇, CN
• Chuanxiang Tang · Beijing, CN
• Huaibi Chen · Beijing, CN
• Xinshui Yan · Beijing, CN

Key dates

• Filing date: Sep 6, 2017
• Grant date: Jun 5, 2018
• Expiry date: Sep 6, 2037

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01J2235/16
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

An apparatus and method to generate distributed x-rays. A hot cathode of an electron gun is used in vacuum to generate electron beams having certain initial movement energy and speed. Periodic scanning is performed with the initial low-energy electron beams, which are thus caused to be reciprocally deflected. A current-limiting device is provided in the travel path of the electron beams along the direction of the reciprocal deflection. Through holes arranged in an array on the current-limiting device, only part of the electron beams targeting specific positions can pass to form sequential electron beam currents distributed in an array. These electron beam currents are accelerated by a high-voltage electric field to obtain high energy, bombard an anode target, and thus sequentially generate corresponding focus spots and x-rays distributed in an array at the anode target.