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MO: Fachverband Molekülphysik
MO 19: Poster 3
MO 19.17: Poster
Thursday, March 17, 2022, 16:30–18:30, P
Towards nanoplasma formation from size selected helium droplets using an electrostatic deflector — Cristian Medina1, •Sebastian Trippel2, Robert Moshammer3, Thomas Pfeifer3, Jochen Kupper2, Frank Stienkemeier1, and Marcel Mudrich4 — 11University of Freiburg, Freiburg im Breisgau, Germany — 2Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany — 3Max Planck Institute for Nuclear Physics, Heidelberg, Germany — 4Aarhus University, Aarhus, Denmark
It has recently been demonstrated that passing a molecule with a large dipole moment embedded inside a helium nanodroplet across an inhomogeneous electric field allows deflecting the entire droplet depending on its mass [1]. We present the calculations and design for a helium droplet size selector apparatus using CsI molecules as dopants. The doped clusters are deflected transversally by a type-B deflector with an inhomogeneous electric field [2]. In the proposed experiment, a nanoplasma is ignited in the helium droplet by a NIR femtosecond laser, tightly focused by a motorized back-focusing mirror, moving the focus across the diverted beam. The resulting electrons and ions emitted by the nanoplasma are collected by an electron velocity-map imaging and an ion time-of-flight spectrometer. The theoretical calculations of the spatial deflections were done using the CMIfly software developed by the Molecule Imaging group (CMI) at the Centre for Free-Electron Laser Science (CFEL)[2].
[1]D.J. Merthe et al., j. phys. chem. lett. 7 (2016).
[2]J-P. Chang et al., comput. phys. commun. 185 (2014).