GB1252375A - - Google Patents

Abstract

1,252,375. Ion beam tubes. KERNFORSCHUNG m.b.H. GES. FUR. 8 Dec., 1969 [21 Dec., 1968], No. 59777/69. Heading HID. In a neutron generator in which an ion source is kept at a high potential and neutrons are generated by nuclear reactions between the ion beam and a target, the ion source 1 is formed as a unit inside an ion source housing 5, which is substantially rotationally symmetrical about the ion beam axis, is supported by several insulators, e.g. 2 and 3, which radially contact the housing 5 and extend perpendicular to the ion beam, and is surrounded by a grounded metallic vacuum housing 4 which has a flanged opening 403 disposed opposite the source ion exit 501 enabling connection thereto of target holder and other electrode assemblies. As shown, insulator 2 is fixed to housing 4 at one end and merely engages a recess in ion source housing 5 at the other, whereas the other insulator 3 is fixed to the ion source housing 5 such that the unit comprising the housing 5, insulator 3 and support flange 401 can be removed from the vacuum housing 4. A bore 301 in the insulator 3 contains a pipe 302 for supplying the anode voltage and this pipe in turn contains an insulated pipe 304 for supplying deuterium to the ion source, a cable 306 which with pipe 304 supplies the filament current, a cable 307 for an intermediate electrode power supply, and a tube 308 for removing liquid cooling the ion source, this liquid being supplied through the residual crosssection of pipe 302. The ion source may be of the duoplasmatron type and housing cover 502 and cathode support 101 are removable without disturbing liquid in the cooling channel 102 to replace the cathode. The components coupled to flange 403 may include a stationary or rotary target with or without a focusing system, and if it is insulatingly supported in a vacuum housing the target may be kept at a high negative potential to double the ion energy, Figs. 2- 5 (not shown).