Probe for radiation measurement, particularly inside the core of nuclear reactors

The probe is to measure the neutron flux inside the core of nuclear reactors. It consists of the electrical parallel circuit of a collectron (beta flow neutron detector) with a fission chamber. The parallel circuit is a result of the mechanical joining of two head ends of the tubular outer electrodes of about the same diameter and of the inner electrodes. These are designed as inner conductors. Thus one achieves that only two conductors must be lead out of the core of the reactor. The mechanical joint is a welding or hard brazing joint. (DG/LH)