dc.contributor.author
Holldack, Karsten
dc.contributor.author
Bahrdt, Johannes
dc.contributor.author
Balzer, Andreas
dc.contributor.author
Bovensiepen, Uwe
dc.contributor.author
Brhezinskaya, Maria
dc.contributor.author
Erko, Alexei
dc.contributor.author
Eschenlohr, Andrea
dc.contributor.author
Follath, Rolf
dc.contributor.author
Firsov, Alexander
dc.contributor.author
Frentrup, Winfried
dc.contributor.author
Le Guyader, Loic
dc.contributor.author
Kachel, Torsten
dc.contributor.author
Kuske, Peter
dc.contributor.author
Mitzner, Rolf
dc.contributor.author
Müller, Roland
dc.contributor.author
Pontius, Niko
dc.contributor.author
Quast, Torsten
dc.contributor.author
Radu, Ilie
dc.contributor.author
Schmidt, Jan-Simon
dc.contributor.author
Schüßler-Langeheine, Christian
dc.contributor.author
Sperling, Mike
dc.contributor.author
Stamm, Christian
dc.contributor.author
Trabant, Christoph
dc.contributor.author
Föhlisch, Alexander
dc.date.accessioned
2018-06-08T03:55:29Z
dc.date.available
2014-11-13T13:07:25.501Z
dc.identifier.uri
https://refubium.fu-berlin.de/handle/fub188/16220
dc.identifier.uri
http://dx.doi.org/10.17169/refubium-20404
dc.description.abstract
Here the major upgrades of the femtoslicing facility at BESSY II (Khan et al.,
2006) are reviewed, giving a tutorial on how elliptical-polarized ultrashort
soft X-ray pulses from electron storage rings are generated at high repetition
rates. Employing a 6 kHz femtosecond-laser system consisting of two amplifiers
that are seeded by one Ti:Sa oscillator, the total average flux of photons of
100 fs duration (FWHM) has been increased by a factor of 120 to up to 106
photons s-1 (0.1% bandwidth)-1 on the sample in the range from 250 to 1400 eV.
Thanks to a new beamline design, a factor of 20 enhanced flux and improvements
of the stability together with the top-up mode of the accelerator have been
achieved. The previously unavoidable problem of increased picosecond-
background at higher repetition rates, caused by `halo' photons, has also been
solved by hopping between different `camshaft' bunches in a dedicated fill
pattern (`3+1 camshaft fill') of the storage ring. In addition to an increased
X-ray performance at variable (linear and elliptical) polarization, the sample
excitation in pump-probe experiments has been considerably extended using an
optical parametric amplifier that supports the range from the near-UV to the
far-IR regime. Dedicated endstations covering ultrafast magnetism experiments
based on time-resolved X-ray circular dichroism have been either upgraded or,
in the case of time-resolved resonant soft X-ray diffraction and reflection,
newly constructed and adapted to femtoslicing requirements. Experiments at low
temperatures down to 6 K and magnetic fields up to 0.5 T are supported. The
FemtoSpeX facility is now operated as a 24 h user facility enabling a new
class of experiments in ultrafast magnetism and in the field of transient
phenomena and phase transitions in solids.
en
dc.rights.uri
http://journals.iucr.org/services/copyrightpolicy.html
dc.subject.ddc
500 Naturwissenschaften und Mathematik::530 Physik
dc.type
Wissenschaftlicher Artikel
dcterms.bibliographicCitation
Journal of Synchrotron Radiation. - 21 (2014), 5, S. 1090-1104
dc.identifier.sepid
37282
dc.title.subtitle
a versatile optical pump–soft X-ray probe facility with 100 fs X-ray pulses of
variable polarization
dcterms.bibliographicCitation.doi
10.1107/S1600577514012247
refubium.affiliation
Physik
de
refubium.mycore.fudocsId
FUDOCS_document_000000021273
refubium.resourceType.isindependentpub
no
refubium.mycore.derivateId
FUDOCS_derivate_000000004138
dcterms.accessRights.openaire
open access
dcterms.isPartOf.issn
1600-5775