A5017674820- Particle Accelerators and Free-Electron Lasers
- Particle accelerators and beam dynamics
- Advanced X-ray Imaging Techniques
- Gyrotron and Vacuum Electronics Research
- Superconducting Materials and Applications
- Laser Design and Applications
- Laser-Plasma Interactions and Diagnostics
- Advancements in Photolithography Techniques
- Photocathodes and Microchannel Plates
- Crystallography and Radiation Phenomena
- Laser-Matter Interactions and Applications
- Advanced Electron Microscopy Techniques and Applications
- Photonic and Optical Devices
- Electron and X-Ray Spectroscopy Techniques
- Terahertz technology and applications
- Pulsed Power Technology Applications
- Particle Detector Development and Performance
- X-ray Spectroscopy and Fluorescence Analysis
- Diamond and Carbon-based Materials Research
- Nuclear Physics and Applications
- Advanced Frequency and Time Standards
- Advanced Physical and Chemical Molecular Interactions
- Scientific Research and Discoveries
- Advanced Surface Polishing Techniques
- Scientific Measurement and Uncertainty Evaluation
Paul Scherrer Institute
2008-2020
Vifor Pharma (Switzerland)
2002-2012
Swiss Light Source
2001-2007
Darmstadt University of Applied Sciences
1994-1996
The SwissFEL X-ray Free Electron Laser (XFEL) facility started construction at the Paul Scherrer Institute (Villigen, Switzerland) in 2013 and will be ready to accept its first users 2018 on Aramis hard branch. In following sections we summarize various aspects of project, including design soft branches accelerator, results performance simulations, details photon beamlines experimental stations, our commissioning results.
We report on the temporal and spatial stability of first tunable femtosecond undulator hard-x-ray source for ultrafast diffraction absorption experiments. The 2.5-1 Angstrom output radiation is driven by an initial 50 fs laser pulse employing laser-electron slicing technique. By using x-ray to probe laser-induced coherent optical phonons in bulk bismuth, we estimate duration 140+/-30 FWHM with timing drifts below 30 rms measured over 5 days. Optical control lattice motion demonstrated.
An upgrade of the Swiss Light Source (SLS) is planned for 2021-2024 and includes exchange existing storage ring by a new one providing about 40-50 times lower emittance in user operation mode. This will extend performance SLS particular fields coherent imaging, full-field tomography, soft X-ray angle-resolved photoelectron spectroscopy resonant inelastic scattering. A science case conceptual design machine have been established. As summary these reports, novel lattice design, undulator...
The SwissFEL Injector Test Facility operated at the Paul Scherrer Institute between 2010 and 2014, serving as a pilot plant testbed for development realization of SwissFEL, X-ray Free-Electron Laser facility under construction same institute. test consisted laser-driven rf electron gun followed by an S-band booster linac, magnetic bunch compression chicane diagnostic section including transverse deflecting cavity. It delivered bunches up to 200 pC charge 250 MeV beam energy repetition rate...
Illumination of a ZrC needle with short laser pulses (16 ps, 266 nm) while high voltage (-60 kV, 2 ns, 30 Hz) are applied, produces photo-field emitted electron bunches. The electric field is and varies rapidly over the surface so that quantum efficiency (QE) near apex can be much higher than for flat photocathode due to Schottky effect. Up 150 pC (2.9 A peak current) have been extracted by emission from needle. effective emitting area has an estimated radius below 50 microm leading...
The accurate measurement of the arrival time a hard X-ray free electron laser (FEL) pulse with respect to is utmost importance for pump-probe experiments proposed or carried out at FEL facilities around world. This manuscript presents latest device meet this challenge, THz streak camera using Xe gas clusters, capable measurements an estimated accuracy several femtoseconds. An experiment performed SACLA demonstrates performance photon energies between 5 and 10 keV variable beam parameters.
A wavefront metrology setup based on the X-ray grating interferometry technique for spatially resolved, quantitative, in situ and at-wavelength measurements of at synchrotron radiation hard free-electron laser beamlines is reported. Indeed, ever-increasing demands optical components to preserve shape coherence delivered beam call more sensitive diagnostic instruments. Thanks its angular sensitivity, has been established recent years as an adequate wavefront-sensing quantitatively assessing...
Electro-optical detection of THz coherent synchrotron radiation is a nondestructive method for measuring subpicosecond electron bunches or substructures on otherwise longer bunches. With new diagnostic setup at the Swiss Light Source, which combines an amplified Yb fiber laser and suitable GaP crystal, we demonstrate sampling as well spectrally resolved single-shot measurements sliced containing little few pC charge. The not only allow precise electric field characterization but also...
In the framework of this thesis, a setup for single-shot bunch profile measurements was designed, successfully installed into vacuum chamber ANKA and commissioned. It allows with sub-ps resolution.
The recent entry of X-ray free electron lasers (FELs) to all fields physics has created an enormous need, both from scientists and operators, for better characterization the beam by these facilities. Of particular interest is measurement arrival time FEL pulse relative a laser pump, pump-probe experiments, length. This article describes scheme that corrects one major sources uncertainty in types measurements, namely jitter experimental beam. setup presented here uses combination THz streak...
An evaluation of the cone-shaped pickup performance as a part high bandwidth bunch arrival-time monitors (BAMs) for low charge sub-10 fs measurements is presented. Three sets pickups are installed at free electron laser FLASH Deutsches Elektronen-Synchrotron, quasi-cw SRF accelerator ELBE Helmholtz-Zentrum Dresden-Rossendorf and SwissFEL injector test facility Paul Scherrer Institute. Measurements simulations in good agreement fulfill design specifications. Utilizing BAM with pickups, an...
Concepts for a fast orbit feedback in the SLS storage ring are presented. The Singular Value Decomposition (SVD) based correction scheme is supposed to fight oscillations up 100 Hz stabilizing 1/10th of beam sigma at locations insertion devices. For an emittance ratio 1%, this corresponds 1 /spl mu/m tolerance vertical plane. In order achieve high accuracy strong restrictions imposed on residual noise position monitoring and system. Theoretical estimates gain made using simplified model....
SwissFEL is a x-rays free electron laser (FEL) driven by 5.8 GeV linac under construction at Paul Scherrer Institut. In SwissFEL, wire scanners (WSCs) will be complementary to view-screens for emittance measurements and routinely used monitor the transverse profile of beam during FEL operations. The WSC composed an in-vacuum beam-probe---motorized stepper motor---and out-vacuum pick-up signal. mechanical stability hardware has been characterized on test bench. particular, motor induced...
The Swiss Light Source (SLS) at the Paul Scherrer Institute (PSI) consists of a turn key 100 MeV linac, novel type booster synchrotron and 12-TBA storage ring providing 5 nm-rad natural emittance 2.4 GeV, SLS project was approved by Government in Sept. 1997. By June 1999 building finished. Linac commissioning concluded April, resp. 2000. First beam stored Dec. 15, 2001 entered final phase: design current 400 mA reached, an excellent agreement lattice functions with calculations achieved...
The infrared beamline at the Swiss light source uses dipole radiation and is designed to transport four experimental stations, A, B, C, D. Branch A dedicated far IR work in vacuum; branch B a micro-spectrometer; C high resolution spectroscopy gas phase; D pump probe set-up. This contribution describes optical layout provides brief survey of currently available stations. regular user operation since 2009.
The FEMTO source under construction at the μXAS beamline is designed to enable tunable time‐resolved laser/x‐ray absorption and diffraction experiments in photochemistry condensed matter with ps‐ sub‐ps resolution. design takes advantage of (1) highly stable operation SLS storage ring, (2) reliable high harmonic small gap, short period undulators generate hard x‐rays energy 3–18 keV 2.4 GeV beam energy, (3) progress power, repetition rate fs solid‐state laser technology employ laser/e‐beam...
FEMTO, a femtosecond (fs) X-ray source based on laser interaction with relativistic electron beam, began operation in the fall of 2006. It is installed at μXAS beamline Swiss Light Source (SLS) Paul Scherrer Institut, Villigen. "Laser slicing" an beam has first been proposed and demonstrated ALS [] recently implemented BESSY [2 Khan, S. Phys. Rev. Lett, 97: 074801[Crossref], [Web Science ®] , [Google Scholar]] to generate fs soft X-rays (1–2 keV) variable polarization. FEMTO undulator...