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          Institute: MPI für Kernphysik     Collection: Physics of Quantum Dynamics in Atomic Fragmentation     Display Documents



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ID: 508167.0, MPI für Kernphysik / Physics of Quantum Dynamics in Atomic Fragmentation
Exploring few-photon, few-electron reactions at FLASH: from ion yield and momentum measurements to time-resolved and kinematically complete experiments
Authors:Rudenko, A.; Jiang, Y. H.; Kurka, M.; Kühnel, K. U.; Foucar, L.; Herrwerth, Oliver; Lezius, Matthias; Kling, Matthias F.; Schröter, C. D.; Moshammer, R.; Ullrich, J.
Language:English
Date of Publication (YYYY-MM-DD):2010-10-14
Title of Journal:Journal of Physics B
Volume:43
Issue / Number:19
Start Page:1
End Page:16
Sequence Number of Article:194004
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:In this paper, we briefly review a series of recent pioneering experiments on few-photon-induced multiple fragmentation of atoms and molecules performed at the free electron laser (FEL) at Hamburg (FLASH) using a 'reaction microscope', i.e. a coincident momentum imaging technique. For atoms we consider the most basic nonlinear process, namely direct or sequential two-photon double ionization (TPDI). In particular, benchmark data for theory are presented, such as recoil–ion momentum distributions for direct TPDI of He and Ne, and fully differential data for sequential TPDI of Ne. For molecules we show how one can identify contributions from different reaction channels by inspecting the measured kinetic energy and angular distributions of ionic fragments and even infer the time delay between the two-photon absorption events in TPDI by detailed comparison with theory. Finally, we describe a novel split mirror arrangement for EUV-pump–EUV-probe experiments and present the very first time-resolved data on the dynamics of N2 molecules irradiated by the FLASH light.
Classification / Thesaurus:32.80.Rm Multiphoton ionization and excitation to highly excited states 33.80.Rv Multiphoton ionization and excitation to highly excited states (e.g., Rydberg states) 82.30.Lp Decomposition reactions (pyrolysis, dissociation, and fragmentation) 07.57.-c Infrared, submillimeter wave, microwave and radiowave instruments and equipment 41.60.Cr Free-electron lasers
External Publication Status:published
Document Type:Article
Affiliations:MPI für Kernphysik/Group of J. Ullrich/Strong-Fields Physics (R. Moshammer)
MPI für Quantenoptik
External Affiliations:Max-Planck Advanced Study Group at CFEL, 22607 Hamburg, Germany
Identifiers:URL:http://iopscience.iop.org/0953-4075/43/19/194004
DOI:10.1088/0953-4075/43/19/194004
LOCALID:3996
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