Examination of a chamber of a large fusion facility by means of neutron activation techique with nanosecond neutron pulse generated by dense plasma focus device PF-6

Sounding procedure for characterization of big fusion reactor chambers by means of a compact neutron source with a nanosecond pulse duration

“…Modern and future chambers of nuclear fusion reactors are rather complicated constructions installed in an intricate environment. Elements of the surroundings represent absorbers and scatterers for the main fusion energy carriers -neutrons [1].…”

“…In the beginning we shall describe in this paper activation methodology based on neutrons generated in a DPF device PF-6 ( Figure 2a) due to D-D reactions (so 2.45-MeV neutrons in these experiments are generated, and subsequently they are subjected mainly to elastic scattering on elements and systems of a NFC). We shall make it here in short because some features of this method is already presented in our recent paper [1]. Then we shall discuss more precisely a neutron spectroscopic technique here that we intend to use in the following experimental sessions.…”

“…Then we shall discuss more precisely a neutron spectroscopic technique here that we intend to use in the following experimental sessions. In our case (as it was in the experiments [1]) we shall exploit in the capacity of the simulator of a big NFC a large chamber of the PF-1000U facility [9] available at the Institute of Plasma Physics and Laser Microfusion (Figure 2b), Poland. The vacuum chamber of the PF-1000U device has the shape of a large cylinder with walls made of stainless steel.…”

“…Figure 2a) is described in several papers (see e.g. [1,[10][11][12]). Its capacitor bank charged up to 20 kV contains about 6 kJ of energy.…”

“…Its capacitor bank charged up to 20 kV contains about 6 kJ of energy. The de inition of the device as a neutron source (its major parameters that were measured many times [1] including present experiments) is as follows:…”