公开(公告)号：US20240153739A1

公开(公告)日：2024-05-09

申请号：US17769664

申请日：2020-10-16

Applicant: US Electron, Inc.

Inventor： John Noonan ,  Dean Walters

IPC: H01J37/315 ,  B23K15/00 ,  B23K15/06 ,  H01J15/02 ,  H01J29/86 ,  H01J29/94

CPC classification number: H01J37/315 ,  B23K15/0026 ,  B23K15/06 ,  H01J15/02 ,  H01J29/865 ,  H01J29/94 ,  H01J2229/94 ,  H01J2237/049

Abstract: In an embodiment, a system is provided that includes an electron gun, a focusing system, and a housing. The electron gun can include a cold cathode electron source and an extraction electrode. The focusing system can be configured to focus a beam of electrons extracted from the electron gun to a focal region. The housing can include the electron gun and extend along a housing axis in the direction of the electron beam. The cold cathode source is configured to emit electrons at a first operating pressure that is higher than a second operating pressure at the focal region of the electron beam.

公开(公告)号：US20220384138A1

公开(公告)日：2022-12-01

申请号：US17808147

申请日：2022-06-22

Applicant: US Electron, Inc.

Inventor： John Noonan ,  Dean Walters

IPC: H01J37/077 ,  H01J37/315 ,  H01J37/18 ,  B23K15/06

Abstract: In an embodiment, a system is provided that includes an electron gun, a focusing system, and a housing. The electron gun can include a cold cathode electron source and an extraction electrode. The focusing system can be configured to focus a beam of electrons extracted from the electron gun to a focal region. The housing can include the electron gun and extend along a housing axis in the direction of the electron beam. The cold cathode source is configured to emit electrons at a first operating pressure that is higher than a second operating pressure at the focal region of the electron beam.