US 11,990,307 B2
Electron gun
Christof Dietrich, Niederstotzingen (DE); Norbert Festl, Neu-Ulm (DE); and Harald Seidel, Burgrieden (DE)
Assigned to Thales Deutschland GmbH Electron Devices, Ulm (DE)
Appl. No. 17/277,760
Filed by Thales Deutschland GmbH Electron Devices, Ulm (DE)
PCT Filed Sep. 11, 2019, PCT No. PCT/EP2019/074183
§ 371(c)(1), (2) Date Mar. 19, 2021,
PCT Pub. No. WO2020/058053, PCT Pub. Date Mar. 26, 2020.
Claims priority of application No. 10 2018 123 100.8 (DE), filed on Sep. 20, 2018.
Prior Publication US 2021/0350995 A1, Nov. 11, 2021
Int. Cl. H01J 3/02 (2006.01); H01J 23/07 (2006.01); H01J 35/06 (2006.01)
CPC H01J 3/027 (2013.01) [H01J 23/07 (2013.01); H01J 35/06 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An electron gun (EK) comprising a cathode (KA) having not only a cathode holder (KH) and a cathode body (KK) but also a Wehnelt cylinder (WZ),
wherein the cathode holder (KH) receives the cathode body (KK) and the Wehnelt cylinder (WZ) is suitable for bundling free electrons, which are able to emerge from the cathode body (KK) in the direction of the Wehnelt cylinder (WZ), as an electron beam (ES), and the Wehnelt cylinder (WZ) is disposed, at least in portions along a first inner face (WI1) turned toward the cathode holder (KH), interlockingly on an outer face (KA) of the cathode holder (KH) and at least partly surrounds the cathode holder (KH);
wherein the cathode holder (KH) is made in hollow cylindrical manner; and
wherein the inside diameter is dimensioned such that the cathode holder (KH) is configured to receive the cathode body (KK) interlockingly in the cathode holder (KH).