A. Streun
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View article: Efficient algorithms for dynamic aperture and momentum acceptance calculation in synchrotron light sources
Efficient algorithms for dynamic aperture and momentum acceptance calculation in synchrotron light sources Open
New algorithms useful for the calculation of dynamic aperture and momentum acceptance in circular accelerators, particularly synchrotron light sources, are developed and presented. The flood-fill tool from raster graphics inspired us to ef…
View article: Efficient algorithms for dynamic aperture and momentum acceptance calculation
Efficient algorithms for dynamic aperture and momentum acceptance calculation Open
New algorithms useful for the calculation of dynamic aperture and momentum acceptance in circular accelerators are developed and presented. The flood-fill tool from raster graphics inspired us to efficiently compute dynamic apertures by mi…
View article: Swiss Light Source upgrade lattice design
Swiss Light Source upgrade lattice design Open
Following the spectacular success of the third-generation light source over the past decades, a few new-generation light sources based on the multibend achromat (MBA) scheme have come into operation. Other such facilities are also under co…
View article: Equilibrium parameters in coupled storage ring lattices and practical applications
Equilibrium parameters in coupled storage ring lattices and practical applications Open
We calculate equilibrium emittances and damping times due to the emission of synchrotron radiation for coupled storage ring lattices by evaluating the projections of the commonly used synchrotron radiation integrals onto the normal modes o…
View article: Equilibrium parameters in coupled storage ring lattices and practical applications
Equilibrium parameters in coupled storage ring lattices and practical applications Open
We calculate equilibrium emittances and damping times due to the emission of synchrotron radiation for coupled storage ring lattices by evaluating the projections of the commonly used synchrotron radiation integrals onto the normal modes o…
View article: “Spiral COSAMI” — A Multi-Undulator Compact Source for Actinic Mask Inspection in the extreme ultraviolet range
“Spiral COSAMI” — A Multi-Undulator Compact Source for Actinic Mask Inspection in the extreme ultraviolet range Open
A compact electron storage ring provides a bright, stable and reliable source of extreme ultraviolet (EUV) radiation for metrology applications in semiconductor industry. The COSAMI concept (COmpact Synchrotron for Actinic Mass Inspection)…
View article: Multiobjective optimization of the dynamic aperture using surrogate models based on artificial neural networks
Multiobjective optimization of the dynamic aperture using surrogate models based on artificial neural networks Open
Modern synchrotron light source storage rings, such as the Swiss Light Source\nupgrade (SLS 2.0), use multi-bend achromats in their arc segments to achieve\nunprecedented brilliance. This performance comes at the cost of increased\nfocusin…
View article: Development of Fast and Super-Fast Kicker System for SLS 2.0 Injection
Development of Fast and Super-Fast Kicker System for SLS 2.0 Injection Open
Swiss Light Source plans a major upgrade to turn the existing Storage Ring (SR) into a modern diffraction-limited light source called SLS 2.0. As part of this project, the injection system has to be upgraded as well in order to ensure reli…
View article: Multi-objective optimization of the dynamic aperture for the Swiss Light Source upgrade
Multi-objective optimization of the dynamic aperture for the Swiss Light Source upgrade Open
The upgrade of the Swiss Light Source, called SLS 2.0, is scheduled for 2023-24. The current storage ring will be replaced by one based on multi-bend achromats, allowing for about 30 times higher brightness. Due to the stronger focusing an…
View article: Low emittance lattice design from first principles: Reverse bending and longitudinal gradient bends
Low emittance lattice design from first principles: Reverse bending and longitudinal gradient bends Open
The well-known relaxed theoretical minimum emittance (TME) cell is commonly\nused in the design of multi-bend achromat (MBA) lattices for the new generation\nof diffraction limited storage rings. But significantly lower emittance at\nmoder…
View article: Exploring the Potential of the Swiss Light Source
Exploring the Potential of the Swiss Light Source Open
Swiss Light Source (SLS) has been on-line since 2001. Although its performance meets the specifications, it still has a potential to achieve better storage ring beam parameters. We explore two possible improvements. The first one is for th…
View article: Progress on a Novel 7BA Lattice for a 196-m Circumference Diffraction-Limited Soft X-Ray Storage Ring
Progress on a Novel 7BA Lattice for a 196-m Circumference Diffraction-Limited Soft X-Ray Storage Ring Open
The ALS Upgrade to a diffraction-limited soft x-ray storage ring calls for ultralow emittance in a very limited circumference. In this paper we report on progress with a lattice based on a 7BA with distributed chromatic correction. This la…
View article: A high-brightness accelerator-based EUV source for metrology applications
A high-brightness accelerator-based EUV source for metrology applications Open
One of the challenges of actinic metrology tools for EUV lithography is the availability of light sources with high brightness, stability, and availability. In particular, actinic patterned mask inspection on EUV reticles is considered an …
View article: SLS-2 – the upgrade of the Swiss Light Source
SLS-2 – the upgrade of the Swiss Light Source Open
An upgrade of the Swiss Light Source (SLS) is planned for 2021–2024 and includes the exchange of the existing storage ring by a new one providing about 40–50 times lower emittance in user operation mode. This will extend the performance of…
View article: Conceptual Design for SLS-2
Conceptual Design for SLS-2 Open
After 17 years of user operation, we plan to do an upgrade of the Swiss Light Source (SLS) for the period of 2021-2024. The entire storage ring will be replaced with a new layout allowing operation at emittances lowered by factors of 40-50…
View article: Lattice Options for DIAMOND-II
Lattice Options for DIAMOND-II Open
Generalized MBA (Multi-Bend-Achromat) Chasman-Green type lattices, with a low-dispersion mid-straight, have been studied and refined by pursuing a generalized Higher Order Achromat to control the non-linear dynamics to obtain a robust desi…
View article: Towards an Upgrade of the Swiss Light Source
Towards an Upgrade of the Swiss Light Source Open
An upgrade of the Swiss Light Source (SLS) is planned for the period 2021-24. The existing 12-TBA (triple bend achromat) lattice will be exchanged by a 12-7BA (7-bend achromat) lattice in order to reduce the emittance from present 5.5 nm d…
View article: A Compact High-Brightness Accelerator-based EUV Source for Actinic Mask Inspection
A Compact High-Brightness Accelerator-based EUV Source for Actinic Mask Inspection Open
The design of a compact electron storage ring for the production of high-brightness EUV radiation is presented. Such a source has potentially important metrology applications in the semiconductor industry.
View article: Proposed Upgrade of the SLS Storage Ring
Proposed Upgrade of the SLS Storage Ring Open
A new storage ring is planned for the upgrade of the Swiss Light Source (SLS). It will replace the 12 triple bend achromats by twelve 7-bend achromats, which are based on low aperture longitudinal gradient bends (LGBs) and anti-bends (ABs)…
View article: Longitudinal injection scheme using short pulse kicker for small aperture electron storage rings
Longitudinal injection scheme using short pulse kicker for small aperture electron storage rings Open
Future light sources aim at achieving a diffraction limited photon beam both in the horizontal and vertical planes. High gradient quadrupoles and strong chromaticity correction sextupoles in a corresponding ultra-low emittance ring may res…
View article: Optimizing SLS-2 Nonlinearities Using a Multi-Objective Genetic Optimizer
Optimizing SLS-2 Nonlinearities Using a Multi-Objective Genetic Optimizer Open
An upgrade to the SLS is currently under development. This upgrade will likely utilize the same hall and same machine circumference, 288 m, of the SLS. Achieving a sufficiently low emittance with such a small circumference requires tight f…
View article: Orbit Correction and Stability Studies for Ultra-Low Emittance Storage Rings
Orbit Correction and Stability Studies for Ultra-Low Emittance Storage Rings Open
Ultra-low emittance storage rings exhibit extremely strong focusing and sextupolar chromaticity corrections. The therefore mandatory excellent centering of the closed orbit in the small aperture magnets is a challenging task and necessitat…
View article: Design Studies for an Upgrade of the SLS Storage Ring
Design Studies for an Upgrade of the SLS Storage Ring Open
An upgrade of the Swiss Light Source (SLS) would replace the existing storage ring by a low aperture multibend achromat lattice providing an emittance of about 100–200 pm at 2.4 GeV, while maintaining the hall, the beam lines and the injec…
View article: Round Beam Operation in Electron Storage Rings and generalisation of Mobius accelerator
Round Beam Operation in Electron Storage Rings and generalisation of Mobius accelerator Open
A better performing photon beam can be obtained from light sources when the eletron beam is formed into a "round beam" rather than a flat beam. It is realised by equally distributing the natural emittance into the horizontal and vertical p…