FS-FLASH-D

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2019-09-23
11:19
[PUBDB-2019-03424] Journal Article
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Nonlinear Coherence Effects in Transient-Absorption Ion Spectroscopy with Stochastic Extreme-Ultraviolet Free-Electron Laser Pulses
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2019-09-23
10:57
[PUBDB-2019-03423] Journal Article
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Tracing charge transfer in argon dimers by XUV-pump IR-probe experiments at FLASH
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2019-09-19
19:02
[PUBDB-2019-03416] Journal Article/Contribution to a conference proceedings
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Intensity-dependent near-threshold ionization of Kr in the vacuum-uv
International Conference on Spectral Lines Shapes, DublinDublin, Ireland, 17 Jun 2018 - 22 Jun 20182018-06-172018-06-22 Journal of physics / Conference Series Conference Series 1289, 012030 - () [10.1088/1742-6596/1289/1/012030]  GO
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2019-09-04
11:06
[PUBDB-2019-03210] Journal Article
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Linear Array Detector for Online Diagnostics of Spectral Distributions at MHz Repetition Rates
Free-electron lasers (FELs) based on superconducting accelerator technology and storage ring facilities operate with bunch repetition rates in the MHz range, and the need arises for bunch-by-bunch electron and photon diagnostics. For photon-pulse-resolved measurements of spectral distributions, fast one-dimensional profile monitors are required. [...]
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2019-07-09
16:35
OpenAccess [PUBDB-2019-02676] Journal Article
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Electronic decay of core-excited HCl molecules probed by THz streaking
Structural dynamics 6(3), 034301 () [10.1063/1.5091756]  GO
The ultrafast electronic decay of HCl molecules in the time domain after resonant core excitation was measured. Here, a Cl-2p core electron was promoted to the antibonding σ* orbital initiating molecular dissociation, and simultaneously, the electronic excitation relaxes via an Auger decay [...]
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2019-06-21
10:30
OpenAccess [PUBDB-2019-02527] Journal Article
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Two-color XUV+NIR femtosecond photoionization of neon in the near-threshold region
Results of angle-resolved electron spectroscopy of near-threshold photoionization of Ne atoms bycombined femtosecond extreme ultraviolet and near infraredfields are presented. The dressed-electron spectra show an energetic distribution into so-called sidebands, being separated by thephoton energy of the dressing laser [...]
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2019-05-29
11:54
OpenAccess [PUBDB-2019-02388] Journal Article
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An X-ray gas monitor for free-electron lasers
A novel X-ray gas monitor (XGM) has been developed which allows the measurement of absolute photon pulse energy and photon beam position at all existing and upcoming free-electron lasers (FELs) over a broad spectral range covering vacuum ultraviolet (VUV), extreme ultraviolet (EUV) and soft and hard X-rays. The XGM covers a wide dynamic range from spontaneous undulator radiation to FEL radiation and provides a temporal resolution of better than 200 ns [...]
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2019-01-08
10:09
OpenAccess [PUBDB-2019-00091] Journal Article
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SwissFEL Aramis beamline photon diagnostics
The SwissFEL Aramis beamline, covering the photon energies between 1.77 keV and 12.7 keV, features a suite of online photon diagnostics tools to help both users and FEL operators in analysing data and optimizing experimental and beamline performance. Scientists will be able to obtain information about the flux, spectrum, position, pulse length, and arrival time jitter versus the experimental laser for every photon pulse, with further information about beam shape and size available through the use of destructive screens [...]
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2019-01-07
15:26
OpenAccess [PUBDB-2019-00062] Journal Article
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Femtosecond profiling of shaped x-ray pulses
Arbitrary manipulation of the temporal and spectral properties of x-ray pulses at free-electron lasers would revolutionize many experimental applications. At the Linac Coherent Light Source at Stanford National Accelerator Laboratory, the momentum phase-space of the free-electron laser driving electron bunch can be tuned to emit a pair of x-ray pulses with independently variable photon energy and femtosecond delay [...]
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2018-11-27
15:49
OpenAccess [PUBDB-2018-04884] Journal Article
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Separating Dipole and Quadrupole Contributions to Single-Photon Double Ionization
We report on a kinematically complete measurement of double ionization of helium by a single 1100 eV circularly polarized photon. By exploiting dipole selection rules in the two-electron continuum state, we observed the angular emission pattern of electrons originating from a pure quadrupole transition [...]
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