Ion Accelerator Facility PIAF of PTB modernized
It was, therefore, the objective of the modernization to replace the Van de Graaff accelerator with a new accelerator which is again in a position to cover the original beam parameter range and which offers, at the same time, the advantages of using modern accelerator technology. The choice fell on a tandetron accelerator of the High Voltage Engineering Europa BV company which allows proton beams and deuteron beams with a maximum energy of 4 MeV and alpha beams with a maximum energy of up to 6 MeV to be generated with improved energy sharpness and energy stability. The new accelerator will require considerably less maintenance and operating effort/costs and allows, in particular, the routine provision of alpha particle beams and of pulsed beams for the characterization of neutron energy distributions by the time-of-flight method.
In February of 2016, the old Van de Graaff accelerator was shut down and dismantled after permission had been given by the approving authority. After renovating the accelerator room, the installation of the new accelerator was started in October 2016. At the end of 2016, the new accelerator was handed over to PTB after the PTB staff had undergone intensive training provided by the operating team of the manufacturer. It is now still necessary to repair the air-conditioning systems in the accelerator area. After that, it will presumably be possible to resume regular beam operation in the summer of 2017.
With the acquisition of the new accelerator, in the future it will also be possible to completely cover the whole neutron energy range from approx. 2 keV to 20 MeV at PTB’s ion accelerator facility. The generation of mono-energetic neutrons in such a large energy range is one of PTB’s unique features. PTB has thus ensured its role as one of the leading national metrology institutes in the field of neutron metrology and will continue to be a competent partner in scientific and social questions in the field of neutron radiation.