Gyula Nagy , István Rajta , Zoltán Tamás Gaál , István Vajda

17th International Conference on Nuclear Microprobe Technology and Applications

Date: 14-15 September 2020

Place: On-line

In 1994, a scanning nuclear microprobe beamline (Oxford Microbeams Ltd.) was installed on the old, home-made Van de Graaff accelerator of Atomki, Debrecen, Hungary. In 2015, a new Tandetron accelerator was purchased from High Voltage Engineering Europe B.V. [1], but the microprobe beamline continued to operate on the old VdG accelerator. In 2018, a new nanobeam endstation (Oxford Microbeams Ltd.) was installed on the new Tandetron accelerator. A first resolution test showed 200 nm spot size for low-current mode and below 600 nm for high-current mode [2]. Shortly after this, several major upgrades were implemented on the Tandetron accelerator, including new ion sources, a large analyzing magnet, etc., resulting in the need of a full re-arrangement of the whole beamline hall. Therefore, the nanobeam line must also be re-installed. By the end of 2019, the old VdG accelerator was shut down permanently, so we started to re-install the microbeam line to the new Tandetron accelerator, too. The presentation summarizes the status of these works. First we introduce the capabilities of the Tandetron accelerator, possible ion species and energy range, stability, brightness, etc. Then, we present the status of the two relevant endstations, the micro- and the nanobeam line, including some technical details (e.g. calculations of possible lens configurations, cooling, vibration, etc.). We describe the most important milestones of the re-installations achieved so far, as well as the future plans, regarding expected beam sizes, planned activities, etc.