In this talk I will present a detailed design and optimisation procedure of an ultra-thin (1.76 μm - 2.16 μm) aluminised PET foil cryogenic window, which can withstand >1 bar pressure differences at a leak rate < 1 × 10−9 mbar·l/s, measured at 6 K. The developed window, with 1960 nm thickness, was successfully implemented in the apparatus of the BASE experiment, and allowed to keep the XHV (< 1 × 10−17 mbar) of the experiment for 297 days, intentionally broken to upgrade the setup. Additionally, I will present measurements of the degrading properties of PET foils of thicknesses between 900 nm and 1760 nm with a 100 keV antiproton beam. The talk will be complemented by the possibility to see live how to properly prepare and close the designed window.
Speaker Biography:
Barbara Maria Latacz finished her master’s degree in 2016 at the University of Warsaw working on the analysis of background estimation methods in Higgs boson searches in the tau-tau decay mode at the CMS experiment. In 2019, she successfully defended her Ph.D. at the Universite Paris-Saclay on the antihydrogen atom and ion formation via a charge exchange reaction between antiprotons and positronium, work that was developed within the GBAR collaboration. Afterwards, she joined the BASE collaboration to work on efforts to improve the precision in the determination of the antiproton magnetic moment by at least a factor of 10, first within the Ulmer Fundamental Symmetries Laboratory at RIKEN, Japan, later as a RIKEN fellow, and now as a Senior Research Fellow at CERN. In 2022 she became a technical coordinator of the BASE experiment.
