We propose to measure x-ray fluorescence following charge exchange between bare Xe$^{54+}$ ions and different gas targets at ultra-low collision energies at HITRAP. By detecting fluorescence in coinicidence with projectile ions, and recording ion time-of-flight, reaction channels can be separated. This will provide charge-exchange data for an energy regime inaccesible in storage ring setups,...
Upon impact on a surface, slow highly charged ions (HCIs) deposit large amounts of their potential energy within the first few monolayers of the material. Depending on material properties relaxation processes can lead to nanosized material modifications, e.g. hillocks and craters in bulk samples or pores in 2D materials - often in a similar manner as after swift heavy ion (SHI) impact. For...
