Abstract: A device for reconditioning a neutron tube, comprising on the one hand invariant elements and on the other hand sensitive elements which are subject to wear and gaseous elements which are consumable and which are introduced by way of reservoirs. In accordance with the invention the sensitive elements, for example target (6) and gas reservoirs (7, 8) are collected in the same part (1') of the tube, which part is separable from the other part (1) by means of a tight connection system (12, 12', 13, 14 and 15) in order to make the replacements necessary for reconditioning.

Abstract: A device for improving the service life and the reliability of a sealed high-flux neutron tube, comprising a first part and a second part which are separated by an accelerator electrode (13). The accelerator electrode forms a shield between said parts and which is integral with the external envelope (15) which is connected to ground. The first and second parts of the tube contain the ion source (9), connected to an adjustable positive potential, and the target (28), respectively, which is connected to a negative potential which can be adjusted with respect to the zero value of ground.