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Scientific Highlights from the Division Large Research Facilities (GFA)

Scientific Highlights

26 January 2023
MagDev

CHART MagDev CCT Dipole achieves record field

As one of the first CHART projects, the MagDev activity at PSI designed and built a canted-cosine theta (CCT) demonstrator magnet, wound from Nb3Sn conductor.

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5 October 2022
Magnetic measurements team

Ready for SLS2.0: First magnet series measurement completed

The first magnet series consisting of 112 quadrupole electromagnets for SLS2.0 were measured to high precision using a special home-made rotating coils measurement system. This is an important step forward for the realization of SLS2.0, the upgrade of the Swiss Light Source (SLS) at PSI, and a milestone for the members of the Magnet Section in GFA.

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15 February 2022
Reiche, Aeppli and Gerber

Opening the door to X-ray quantum optics

The 'perfect' X-ray beam-splitter: Researchers at SwissFEL have an ingenious solution to produce coherent copies of pulses, facilitating a realm of new X-ray techniques.

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5 May 2021
teaser

New record photon pulse energies at SwissFEL

The very large number of coherent photons produced by free-electron lasers is one of the key qualities of such facilities, attracting users from numerous research fields including chemistry, biology and materials science. Recently, the two branches of PSI's free-electron laser SwissFEL each have reached new record pulse energies, packing more photons than ever before into ultrashort X-ray pulses delivered at rates of 100 Hz to the users of both beamlines.

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28 January 2021
Next generation transverse deflection structures capable of providing new opportunities for beam diagnostics.

Novel X-band transverse deflection structure with variable polarization

The growing request for sophisticated electron beam manipulation techniques for the optimization of Free Electron Lasers (FELs) or novel acceleration techniques requires enhanced beam control capabilities  and characterization. One of the most important challenge is the development of new diagnostic techniques able to characterize the longitudinal phase space of the beam, including spatial correlation terms, with a resolution in the range of a few tens of fs to sub-fs.

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6 March 2020
fig_highlights_t.jpg

Demonstration of Large Bandwidth Hard X-Ray Free-Electron Laser Pulses at SwissFEL

We have produced hard x-ray free-electron laser (FEL) radiation with unprecedented large bandwidth tunable up to 2%. The experiments have been carried out at SwissFEL, the x-ray FEL facility at the Paul Scherrer Institute in Switzerland. The bandwidth is enhanced by maximizing the energy chirp of the electron beam, which is accomplished by optimizing the compression setup. We demonstrate continuous tunability of the bandwidth with a simple method only requiring a quadrupole magnet. The generation of such broadband FEL pulses will improve the efficiency of many techniques such as x-ray crystallography and spectroscopy, opening the door to significant progress in photon science. It has already been demonstrated that the broadband pulses of SwissFEL are beneficial to enhance the performance of crystallography, and further SwissFEL users plan to exploit this large bandwidth radiation to improve the efficiency of their measurement techniques.

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11 December 2019
ultralow-emittance SwissFEL

Generation and measurement of ultralow-emittance electron beams at SwissFEL

The emittance is a fundamental parameter of particle distributions accounting for the average spread of the particles’ positions and momenta. We have generated and characterized intense ultralow-emittance electron beams, setting new standards for electron linear accelerators. The measurements have been carried out at the SwissFEL accelerator of PSI. SwissFEL is one of the few X-ray free-electron lasers (FELs) worldwide, which are cutting-edge research instruments to investigate matter with resolutions at the level of atomic processes.

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30 September 2019
Ceremony

Award by NPSS

The IEEE Nuclear Plasma Science Society has recently awarded Dr. Paolo Craievich, leader of the group «RF-system 2» in GFA, with the Particle Accelerator Science Technology award for his exceptional contributions to accelerator science and technology. https://www.frib.msu.edu/events/2019/napac19/awards.html

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17 June 2019
Measured spectrum for five consecutive FEL pulses

First Demonstration of Sub-femtosecond X-ray Pulses at SwissFEL

We have produced ultra-short X-ray FEL pulses at SwissFEL by strongly compressing low-charge electron beams.  Single-shot spectral measurements with only a single mode (see the figure below) indicate a pulse duration well below one femtosecond (detailed analysis on the exact pulse duration is ongoing).

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PSI Scientific Reports

Archive 2006-2012. The Scientific Reports – containing accounts of research topics from all the different areas – provide an impression of the variety of subjects researched at PSI.

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