71 citations · 432 across the 14 of their papers we have counts for
14 papers
Controlled molecule injector for cold, dense, and pure molecular beams at the European x-ray free-electron laser
Lanhai He, Melby Johny, Thomas Kierspel +27
A permanently available molecular-beam injection setup for controlled molecules (COMO) was installed and commissioned at the small quantum systems (SQS) instrument at the European…
X-ray diffractive imaging of controlled gas-phase molecules: Toward imaging of dynamics in the molecular frame
Thomas Kierspel, Andrew Morgan, Joss Wiese +25
We report experimental results on the diffractive imaging of three-dimensionally aligned 2,5-diiodothiophene molecules. The molecules were aligned by chirped near-infrared laser pu…
Pure Molecular Beam of Water Dimer
Helen Bieker, Jolijn Onvlee, Melby Johny +5
Spatial separation of water dimer from water monomer and larger water-clusters through the electric deflector is presented. A beam of water dimer with purity and a rotation…
Long-term trapping of cold polar molecules
Dominik Haas, Claudio von Planta, Thomas Kierspel +2
We demonstrate the long-term ( 1 minute) trapping of Stark-decelerated OH radicals in their state in a permanent magnetic trap. T…
Time-resolved inner-shell photoelectron spectroscopy: from a bound molecule to an isolated atom
Felix Brauße, Gildas Goldsztejn, Kasra Amini +47
Due to its element- and site-specificity, inner-shell photoelectron spectroscopy is a widely used technique to probe the chemical structure of matter. Here we show that time-resolv…
Spatial separation of pyrrole and pyrrole-water clusters
Melby Johny, Jolijn Onvlee, Thomas Kierspel +3
We demonstrate the spatial separation of pyrrole and pyrrole(HO) clusters from the other atomic and molecular species in a supersonically-expanded beam of pyrrole and traces of…
Knife edge skimming for improved separation of molecular species by the deflector
Sebastian Trippel, Melby Johny, Thomas Kierspel +7
A knife edge for shaping a molecular beam is described to improve the spatial separation of the species in a molecular beam by the electrostatic deflector. The spatial separation o…
Photophysics of indole upon x-ray absorption
Thomas Kierspel, Cédric Bomme, Michele Di Fraia +11
A photofragmentation study of gas-phase indole (CHN) upon single-photon ionization at a photon energy of 420 eV is presented. Indole was primarily inner-shell ionized at it…
Probing the UV-Induced Photodissociation of CHI and CHFI with Femtosecond Time-Resolved Coulomb Explosion Imaging at FLASH
Kasra Amini, Evgeny Savelyev, Felix Brauße +32
We explore time-resolved Coulomb explosion induced by intense, extreme ultraviolet (XUV) femtosecond pulses from the FLASH free-electron laser as a method to image photo-induced mo…
Alignment, Orientation, and Coulomb Explosion of Difluoroiodobenzene Studied with the Pixel Imaging Mass Spectrometry (PImMS) Camera
Kasra Amini, Rebecca Boll, Alexandra Lauer +33
Laser-induced adiabatic alignment and mixed-field orientation of 2,6-difluoroiodobenzene (C6H3F2I) molecules are probed by Coulomb explosion imaging following either near-infrared…
High-repetition-rate and high-photon-flux 70 eV high-harmonic source for coincidence ion imaging of gas-phase molecules
Jan Rothhardt, Steffen Hädrich, Yariv Shamir +23
Unraveling and controlling chemical dynamics requires techniques to image structural changes of molecules with femtosecond temporal and picometer spatial resolution. Ultrashort-pul…
Strongly aligned gas-phase molecules at Free-Electron Lasers
Thomas Kierspel, Joss Wiese, Terry Mullins +27
We demonstrate a novel experimental implementation to strongly align molecules at full repetition rates of free-electron lasers. We utilized the available in-house laser system at…
Imaging Molecular Structure through Femtosecond Photoelectron Diffraction on Aligned and Oriented Gas-Phase Molecules
R. Boll, A. Rouzee, M. Adolph +49
This paper gives an account of our progress towards performing femtosecond time-resolved photoelectron diffraction on gas-phase molecules in a pump-probe setup combining optical la…
Spatially separated polar samples of the cis and trans conformers of 3-fluorophenol
Thomas Kierspel, Daniel A. Horke, Yuan-Pin Chang +1
We demonstrate the spatial separation of the cis- and trans-conformers of 3-fluorophenol in the gas phase based on their distinct electric dipole moments. For both conformers we cr…