论文和技术资料

The synthesis of the superheavy elements and investigations of their nuclear, atomic and chemical properties are at the scientific forefront. Experiments are challenging due to the extremely low production rates and short half-lives [1]. A new universal high-density gas stopping cell setup for study of gas-phase chemistry and nuclear properties of superheavy elements was proposed, allowing highly-efficient and fast ion beam bunching and extraction into high vacuum[2]. For this, an Ion Transfer by Gas Flow (ITGF) device was proposed by us, as an interface between the gas stopping cell and a setup for chemical separation and detection. The properties of ITGF were studied using the COMSOL Multiphysics® software. The ITGF device is a 20 mm long gas channel, along which the cross section changes smoothly from circular to slit-like. Along the channel, appropriate RF-fields repel the ions from the wall. The AC/DC Module and the Particle Tracing Module are used for the modelling of this ITGF device. The coupling of the three interfaces Laminar Flow, Electric Currents, and Particle Tracing for Fluid Flow shows that travelling ions can be efficiently transported under the combined action of the RF field and the gas flow. This offers exciting prospects in different scientific research applications. Our simulations resulted in the optimization of all parameters, allowing a very fast and effective ion transport to a chemical setup.