公开(公告)号：US20240266136A1

公开(公告)日：2024-08-08

申请号：US18623938

申请日：2024-04-01

申请人： MICRO-X LIMITED

发明人： Robert C. SHEEHY ,  Brian GONZALES ,  Peter YARON ,  Anthony SKEATS ,  Steven TREWARTHA ,  Susanne SAHLOS ,  Gandalf DU PREEZ

IPC分类号： H01J35/06 ,  B82Y15/00 ,  B82Y40/00 ,  C01B32/158 ,  H01J9/02

CPC分类号： H01J35/065 ,  C01B32/158 ,  H01J9/025 ,  B82Y15/00 ,  B82Y40/00 ,  H01J2201/30469

摘要： The present invention relates to large area field emission devices based on the incorporation of macroscopic, microscopic, and nanoscopic field enhancement features and a designed forced current sharing matrix layer to enable a stable high-current density long-life field emission device. The present invention pertains to a wide range of field emission sources and is not limited to a specific field emission technology. The invention is described as an X-ray electron source but can be applied to any application requiring a high current density electron source.

公开(公告)号：US20210212189A1

公开(公告)日：2021-07-08

申请号：US17057026

申请日：2018-11-28

申请人： MICRO-X LIMITED

发明人： Brian GONZALES ,  Robert C. SHEEHY

IPC分类号： H05G1/20 ,  H01J35/06

摘要： A device and method for creating beam formed X-Ray radiation using radio frequency (RF) modulated field emission X-ray sources is described. A radio frequency RF source generates a RF control signal which is supplied to an array of phase delay elements to generate multiple individually controlled phase delayed RF signals. These are then directly provided to each of a plurality of field emission sources (via a matching circuit) to generate a plurality of RF modulated electron current, or beam, each at the same frequency and phase delay of the phase delayed RF signals. Each of the electron beams impacts a target anode to generate X-rays also at the same frequency and phase delay of the phase delayed RF signals. By controlling each of the phase delay elements a beamformed X-ray radiation pattern can be generated.

公开(公告)号：US20210027972A1

公开(公告)日：2021-01-28

申请号：US17045463

申请日：2019-04-04

申请人： MICRO-X LIMITED

发明人： Robert C. SHEEHY ,  Brian GONZALES ,  Peter YARON ,  Anthony SKEATS ,  Steven TREWARTHA ,  Susanne SAHLOS ,  Gandalf DU PREEZ

IPC分类号： H01J35/06 ,  H01J9/02 ,  C01B32/158

摘要： The present invention relates to large area field emission devices based on the incorporation of macroscopic, microscopic, and nanoscopic field enhancement features and a designed forced current sharing matrix layer to enable a stable high-current density long-life field emission device. The present invention pertains to a wide range of field emission sources and is not limited to a specific field emission technology. The invention is described as an X-ray electron source but can be applied to any application requiring a high current density electron source.

公开(公告)号：US20200163196A1

公开(公告)日：2020-05-21

申请号：US16615375

申请日：2018-05-25

申请人： MICRO-X LIMITED

发明人： Brian GONZALES ,  Robert C. SHEEHY

IPC分类号： H05G1/08 ,  H01J35/06 ,  H01J35/14 ,  H05G1/02

摘要： A device and method for creating controlled radio frequency (RF) modulated X-ray radiation is described. The device includes an anode housed within a vacuum enclosure which acts to accelerate and convert an electron beam into X-ray radiation. A RF enclosure is housed within the vacuum enclosure and houses a field emission device, such as a carbon nanotube field emission device or similar cold cathode field emission device. The field emission device is biased to emit the electron beam from a field emission cathode via an extraction electrode in the RF enclosure towards the anode. Additionally an RF impedance matching and coupling circuit is connected electrically to the field emission device. The field emission device is thus directly driven with a RF signal to produce an RF modulated electron current to produce an RF modulated X-ray radiation.