Abstract:

After a short introduction of the Swiss Light Source SLS, I will present the upgrade program SLS 2.0 and its timeline [1].

The major part of the talk will focus on the impact of this upgrade on the front-ends. The existing front-ends have proven to be very reliable and low maintenance. It is therefore planned to reuse some of the existing components after a thorough refurbishment, which will include replacement of components subjected to wear, as well as dismounting, cleaning, reassembling and testing all components of each individual front-end element.

Other components such as the diaphragm, or fixed aperture, have been completely redesigned due changes of the beam parameters. Main reasons being changes in the beam dimensions and power loads, where the later increased by a factor of three for certain beamlines.

We will also show how we evaluated our new and existing designs using coupled fluid, structure finite element analysis FEA and how we were able to benefit from the publications of colleagues working in similar fields from the APS [2], from Diamond [3] and also other e.g. [4].

References:

[1] SLS 2.0 Storage Ring Technical Design Report, (2021), https://www.psi.ch/en/sls2-0
[2] Design Criteria for High-Heat-Load Synchrotron Radiation Applications such as Absorbers, Masks, Shutters, and Slits, Advanced Photon Source Upgrade, (2020)
[3] Technical note for some criteria in Finite element analysis, Diamond Light Source, private communication, (2019)
[4] F. Thomas et al., X-Ray Absorber Design and Calculations for the ESB Storage ring, Proc. of MEDSI (2016)

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