Neutron generator and method of production

The design characteristics of conventional neutron sources for borehole measuring instruments make the use of pre-magnetized magnets necessary. This has the result that degassing of the finished source by superheating is no longer possible. In the neutron source described here, this problem is solved by a magnet component which is also an electrode in the electrode system of the ion generator section. This open magnetic circuit enables the magnet to be magnetized after installation, and this again permits heating prior to magnetization with a temperature above the Curie point of the magnetic material used. (JS)