The intensive DT neutron generator of TU Dresden

Abstract

Abstract-TU Dresden operates an accelerator-based intensive DT neutron generator. Experimental activities comprise investigation into material activation and decay, neutron and photon transport in matter and R&D work on radiation detectors for harsh environments. The intense DT neutron generator is capable to produce a maximum of 10 12 n/s. The neutron source is a solid-type water-cooled tritium target based on a titanium matrix on a copper carrier. The neutron yield at a typical deuteron beam current of 1 mA is of the order of 10 11 n/s in 4π. A pneumatic sample transport system is available for short-time irradiations and connected to wo high-purity germanium detector spectrometers for the measurement of induced activities. The overall design of the experimental hall with the neutron generator allows a flexible setup of experiments including the possibility of investigating larger structures and cooled samples or samples at high temperatures.

40Ar proposed as probe of neutron-induced reactions in a high-density stellar-like plasma at the National Ignition Facility

“…A 20 mm diameter stainless steel spherical ampoule (denoted by HZDR) made of thin stainless steel (0.5 mm thickness) was cryogenically filled with Ar gas enriched in 40 Ar. The sphere was activated during four hours in the 14 MeV neutron flux of the DT generator [11] of Technical University Dresden at Helmholtz Zentrum Dresden Rossendorf, together with appropriate neutron monitors (Al, Zr, Nb) to produce 39 Ar by the 40 Ar(n, 2n) reaction. Fig.…”

Potential for neutron and proton transmutation doping of GaN and Ga2O3

“…It should be noted that the neutron fluence employed in this computation (3.6 Â 10 17 neutrons per cm 2 ) was chosen with reactor fluxes in mind, which is unrealistic for current accelerator-based D-T generators, which would require over 100 hours of continuous operation to achieve this fluence. 66,67 For a 252-Cf source of 10 grams, 55 hours of continuous irradiation at a distance of 1 cm would be required. 68 The dopant population becomes more p-type as a function of time as the dominant n-type dopant Ge decays.…”

Towards a programme of testing and qualification for structural and plasma-facing materials in ‘fusion neutron’ environments

“…A variety of low-intensity ( 1 dpa yr −1 ) accelerator-based D-T FNSs are operational worldwide, including ASP in Aldermaston, UK [119]; FNS at the Japanese Atomic Energy Agency (JAEA), Japan [120]; Technical University of Dresden, Germany [121]; and the FNG at Frascati, Italy [122]. Facilities such as these were useful for experimentally validating the similarity in the initial defect cascade structures for fission and fusion irradiation conditions.…”