SLS-2 – the upgrade of the Swiss Light Source

Streun, A.; Garvey, T.; Rivkin, L.; Schlott, V.; Schmidt, Thomas; Willmott, P. R.; Wrulich, A.

doi:10.1107/s1600577518002722

Cited by 60 publications

(34 citation statements)

References 30 publications

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“…Since the available flux at the beamline will not increase until the foreseen upgrade of the Swiss Light Source (Streun et al, 2018) for 2023-2024, a new highly efficient optical component is key for pushing dynamic tomographic studies to the next level. High efficiency is essential for time-resolved studies, particularly when polychromatic radiation is used, as samples and processes under investigation are often sensitive to radiation damage.…”

Section: Introductionmentioning

confidence: 99%

High-numerical-aperture macroscope optics for time-resolved experiments

Bührer

Stampanoni

Rochet³

et al. 2019

J Synchrotron Rad

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A novel high-quality custom-made macroscope optics, dedicated to high-resolution time-resolved X-ray tomographic microscopy at the TOMCAT beamline at the Swiss Light Source (Paul Scherrer Institut, Switzerland), is introduced. The macroscope offers 4× magnification, has a very high numerical aperture of 0.35 and it is modular and highly flexible. It can be mounted both in a horizontal and vertical configuration, enabling imaging of tall samples close to the scintillator, to avoid edge-enhancement artefacts. The macroscope performance was characterized and compared with two existing in-house imaging setups, one dedicated to high spatial and one to high temporal resolution. The novel macroscope shows superior performance for both imaging settings compared with the previous systems. For the time-resolved setup, the macroscope is 4 times more efficient than the previous system and, at the same time, the spatial resolution is also increased by a factor of 6. For the high-spatial-resolution setup, the macroscope is up to 8.5 times more efficient with a moderate spatial resolution improvement (factor of 1.5). This high efficiency, increased spatial resolution and very high image quality offered by the novel macroscope optics will make 10–20 Hz high-resolution tomographic studies routinely possible, unlocking unprecedented possibilities for the tomographic investigations of dynamic processes and radiation-sensitive samples.

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Section: Introductionmentioning

confidence: 99%

High-numerical-aperture macroscope optics for time-resolved experiments

Bührer

Stampanoni

Rochet³

et al. 2019

J Synchrotron Rad

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“…After division by the denominator term b2 , the magnetspecific coefficients of the D(x) polynomial (appendix A) and the coefficient C replace constant values in the description of the homogeneous bend in Eq. (14). These parameters are dimensionless variants of the I n terms for the symmetric bend in [7].…”

Section: Longitudinal Gradient Bend Cellsmentioning

confidence: 99%

“…Eventually, a real lattice cell based on the aforementioned combined-function magnets is shown in Fig. 17: it is the unit cell of the new storage ring for the upgrade of the Swiss Light Source SLS, named "SLS 2.0" [14][15][16].…”

Section: The Sls 20 Unit Cellmentioning

confidence: 99%

“…Design of a real cell, however, has to provide horizontal and vertical stability, has to take into account technical limitations and will strive for a minimum cell length. Therefore, the general treatment of each cell class is accompanied by the design [13] of a realistic example cell, which eventually cumulates in the present baseline design for the upgrade of the Swiss Light Source, SLS 2.0 [14][15][16] (sec. VI).…”

Section: Introductionmentioning

confidence: 99%

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Low emittance lattice design from first principles: Reverse bending and longitudinal gradient bends

Riemann

Streun

2019

Phys. Rev. Accel. Beams

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The well-known relaxed theoretical minimum emittance (TME) cell is commonly used in the design of multi-bend achromat (MBA) lattices for the new generation of diffraction limited storage rings. But significantly lower emittance at moderate focusing properties can be achieved by combining longitudinal gradient bends (LGB) and reverse bends (RB) in a periodic lattice unit cell.LGBs alone, however, are of rather limited gain.We investigate the emittance achievable for different unit cell classes as a function of the cell phase advance in a most general framework, i.e. with a minimum of assumptions on the particular cell optics. Each case is illustrated with a practical example of a realistic lattice cell, eventually leading to the LGB/RB unit cell of the baseline lattice for the upgrade of the Swiss Light Source.

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“…The halo potentially radiates in the beamline acceptance, leading to an undesirable background because of its duration lying in the picosecond range. It is thus important to achieve an efficient screening of the halo beam contribu-tions, keeping contamination rates below a few percent (Ciavardini et al, 2017;Streun, 2010). Fig.…”

Section: Electron Beam Simulation At Source Pointsmentioning

confidence: 99%

Commissioning of a multi-beamline femtoslicing facility at SOLEIL

Labat

Brubach

Ciavardini

et al. 2018

J Synchrotron Radiat

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The investigation of ultrafast dynamics, taking place on the few to sub-picosecond time scale, is today a very active research area pursued in a variety of scientific domains. With the recent advent of X-ray free-electron lasers (XFELs), providing very intense X-ray pulses of duration as short as a few femtoseconds, this research field has gained further momentum. As a consequence, the demand for access strongly exceeds the capacity of the very few XFEL facilities existing worldwide. This situation motivates the development of alternative sub-picosecond pulsed X-ray sources among which femtoslicing facilities at synchrotron radiation storage rings are standing out due to their tunability over an extended photon energy range and their high stability. Following the success of the femtoslicing installations at ALS, BESSY-II, SLS and UVSOR, SOLEIL decided to implement a femtoslicing facility. Several challenges were faced, including operation at the highest electron beam energy ever, and achievement of slice separation exclusively with the natural dispersion function of the storage ring. SOLEIL's setup also enables, for the first time, delivering sub-picosecond pulses simultaneously to several beamlines. This last feature enlarges the experimental capabilities of the facility, which covers the soft and hard X-ray photon energy range. In this paper, the commissioning of this original femtoslicing facility is reported. Furthermore, it is shown that the slicing-induced THz signal can be used to derive a quantitative estimate for the degree of energy exchange between the femtosecond infrared laser pulse and the circulating electron bunch.

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SLS-2 – the upgrade of the Swiss Light Source

Abstract: The plans for an upgrade of the Swiss Light Source are presented, covering the storage ring lattice concept, the accelerator component designs, the insertion device developments and the science potential of the upgraded facility.

Cited by 60 publications

References 30 publications

High-numerical-aperture macroscope optics for time-resolved experiments

High-numerical-aperture macroscope optics for time-resolved experiments

Low emittance lattice design from first principles: Reverse bending and longitudinal gradient bends

Commissioning of a multi-beamline femtoslicing facility at SOLEIL

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