DEVICE FOR IMPROVING PENNING-TYPE ION SOURCE IN A NEUTRON TUBE

摘要

P In a sealed high flux neutron tube provided with a Penning ion source 1, the confining magnetic field of the ionized gas 9 is made more divergent towards the ion emission zone by action on the magnet system 8 of the ion source. The ion beam originating from the plasma is accelerated 2 and projected onto a target 4. The geometry and the position of the anode 13 inside the ion source adapt to the topography of the lines of force, for an interception minimal trajectory of ionizing electrons oscillating in the structure, adaptation obtained in particular by the use of a frustoconical anode whose generators follow the lines of force. / P P Application to the neutron generators. / P