Device for treating the Penning ion source in a neutron tube

摘要

In a high flux sealed neutron tube provided with a Penning type ion source (1) the magnetic field for confining the ionised gas (9) is rendered more divergent in the direction of the emission zone of the ions by action on the system of magnets (8) of the ion source. The ion beam issuing 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 minimum intercept of the trajectories of the ionising electrons oscillating in the structure, an adaptation obtained in particular by the use of a truncated anode, the generatrices of which follow the lines of force. …IMAGE…