R
Roland Müller
Researcher at Helmholtz-Zentrum Berlin
Publications - 15
Citations - 287
Roland Müller is an academic researcher from Helmholtz-Zentrum Berlin. The author has contributed to research in topics: Storage ring & Betatron. The author has an hindex of 5, co-authored 15 publications receiving 236 citations.
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Journal ArticleDOI
First observation of photons carrying orbital angular momentum in undulator radiation.
TL;DR: Photon beams of 99 eV energy carrying orbital angular momentum have been observed in the 2nd harmonic off-axis radiation of a helical undulator at the 3rd generation synchrotron radiation light source BESSY II.
Journal ArticleDOI
FemtoSpeX: a versatile optical pump–soft X-ray probe facility with 100 fs X-ray pulses of variable polarization
Karsten Holldack,Johannes Bahrdt,Andreas Balzer,Uwe Bovensiepen,Maria Brzhezinskaya,Alexei Erko,A. Eschenlohr,Rolf Follath,Rolf Follath,Alexander Firsov,Winfried Frentrup,L. Le Guyader,Torsten Kachel,Peter Kuske,Rolf Mitzner,Roland Müller,Niko Pontius,T. Quast,Ilie Radu,J.-S. Schmidt,Christian Schüßler-Langeheine,Mike Sperling,Christian Stamm,Christian Stamm,Christoph Trabant,Christoph Trabant,Alexander Föhlisch +26 more
TL;DR: Here the major upgrades of the femtoslicing facility at BESSY II are reviewed, giving a tutorial on how elliptical-polarized ultrashort soft X-ray pulses from electron storage rings are generated at high repetition rates.
Journal ArticleDOI
Single bunch X-ray pulses on demand from a multi-bunch synchrotron radiation source
Karsten Holldack,Ruslan Ovsyannikov,Peter Kuske,Roland Müller,Andreas Schälicke,Michael Scheer,Mihaela Gorgoi,Danilo Kühn,Danilo Kühn,Torsten Leitner,S. Svensson,Nils Mårtensson,Alexander Föhlisch,Alexander Föhlisch +13 more
TL;DR: Pulse picking by resonant excitation in a storage ring creates in addition to the multi-bunch operation a distinct and separable single bunch soft X-ray source that creates unique opportunities for time-resolved photoemission studies as confirmed by time-of-flight spectra.
STATUS OF THE BERLinPro ENERGY RECOVERY LINAC PROJECT
Jens Knobloch,Michael Abo-Bakr,Wolfgang Anders,R. Barday,Klaus Bürkmann-Gehrlein,V. Dürr,S.C.Heßler,Andreas Jankowiak,Thorsten Kamps,Oliver Kugeler,Bettina Kuske,Peter Kuske,Alexander Matveenko,G.Meyer,Roland Müller,Axel Neumann,Klaus Ott,Y.Petenev,D. Pflückhahn,T. Quast,Joachim Rahn,S. Schubert +21 more
TL;DR: The Berlin Energy Recovery Linac Project BERLinPro as discussed by the authors is the first ERL accelerator to achieve a 1-mm mrad emittance beam with an SRF photoinjector.
Journal ArticleDOI
Generation of intense and coherent sub-femtosecond X-ray pulses in electron storage rings.
Ji-Gwang Hwang,Gregor Schiwietz,Michael Abo-Bakr,Terry Atkinson,Markus Ries,Paul Goslawski,G. Klemz,Roland Müller,Andreas Schälicke,Andreas Jankowiak +9 more
TL;DR: A new scheme for the generation of intense and coherent sub-femtoseconds soft X-ray pulses in storage rings by applying the Echo-Enabled Harmonic Generation (EEHG) method is proposed.