@article{KlimesovaRoosHoqueetal.2024, author = {Klimesov{\´a}, Eva and Roos, Andreas Hult and Hoque, Ziaul and Smijesh, N. and Squibb, R.J. and Coudert-Alteirac, H. and Feifel, R. and Andreasson, Jakob and Krikunova, Maria}, title = {Update on MAC End-Station at ELI Beamlines Facility}, series = {Acta Physica Polonica A}, volume = {145}, journal = {Acta Physica Polonica A}, number = {2}, publisher = {Institute of Physics (IOP) and Polish Physical Society}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:526-opus4-18840}, pages = {118 -- 122}, year = {2024}, abstract = {The MAC end-station at the ELI Beamlines facility is a multipurpose user's station for atomic, molecular, and optical sciences and coherent diffractive imaging. The technical design of the station, the available instruments, and an overview of the whole beamline have been published in Eur. Phys. J. Spec. Top. 230, 4183 (2021). Here, we address ongoing upgrades of the MAC end-station that will provide users with advanced capabilities for beam manipulation and electron/ion detection. The upgrades include (i) the installation of a beam preparation chamber in front of the MAC chamber, (ii) a magnetic bottle electron spectrometer with high collection and detection efficiency and high energy resolution, and (iii) an event-driven TPX3CAM detector for velocity map imaging spectrometer, which provides both spatial and temporal information for each pixel. We present results from the first commissioning measurements with these instruments, confirming their performance for state-of-the-art experiments in atomic, molecular, and optical sciences.}, language = {en} } @article{KlimesovaKulykMartinetal.2025, author = {Klimesova, Eva and Kulyk, Olena and Martin, Lucas Janos and Sch{\"u}tte, Bernd and Fr{\"u}hling, Ulrike and Drescher, Markus and Pan, Rui and Stojanovic, Nikola and Bermudez Macias, Ivette J. and D{\"u}sterer, Stefan and Andreasson, Jakob and Wieland, Marek and Krikunova, Maria}, title = {Electron thermalization and ion acceleration in XUV-produced plasma from nanoparticles in He gas environment}, series = {New Journal of Physics}, volume = {27}, journal = {New Journal of Physics}, publisher = {Institute of Physics Publishing (IOP); Deutsche Physikalische Gesellschaft}, url = {http://nbn-resolving.de/urn:nbn:de:kobv:526-opus4-19818}, year = {2025}, abstract = {We use intense femtosecond extreme ultraviolet (XUV) pulses with a photon energy of 92 eV from the FLASH free electron laser to irradiate substrate-free CsCl nanoparticles surrounded by a He gas with a number density of around 1015 cm-3. By simultaneously detecting electrons and energetic ions from the laser-irradiated micron-size target we study the acceleration mechanism of light ions at the microplasma-vacuum boundary as well as at the layer close to the nanoparticle surface. When the XUV pulse interacts with the gas alone, helium ions are accelerated to energies exceeding 100 eV. In the presence of the nanoparticle, light ions gain additional energy in the electric field around the ionized nanoparticle and their energy spectrum changes considerably. We present an electrostatic model to explain the ion acceleration mechanisms both with and without the nanoparticle and discuss the role of the gas environment in experiments.}, language = {en} }