Abstract

During more than 3 decades of my career, I have attested and contributed to the emergent and successful development of modern X-ray light sources such as 3rd generation and low emittance synchrotron, high rep-rate hard X-ray Free Electron Laser. Mechanics and multi-physics analyses can play an important role in the development of those light sources and instrumentation. Beyond the simple checking engineering design of instruments, we can use mechanics and multi-physics analyses to optimize the design, guide design and propose innovative design concept. Furthermore, we can also help interpretation of X-ray experiments.

In this talk, we will cover from civil engineering foundation, slab, building, through high power photon beam management components, high performance X-ray optics, to micrometer scale Galfenol magnetostriction sample in EXAFS experiments: strain inversion due to mechanical constrain, and quantum nano structures: strain distribution.

This talk will stay at high level of each topic to highlight what we can bring added value in terms of mechanics and multi-physics analyses. We intend to address to wide audiences including engineers, scientists.

Abstract

HEPS(High Energy Photon Source) is 1st high energy synchrotron radiation facility in China, it will be located at Huairou Science City(80km away from Beijing). This 7BA, 6GeV, 200mA machine which has horizontal emittance Ɛh around 60pm.rad to gain the high brilliance photon beam, this compact lattice design bring so many engineering challenges for accelerator systems. Here we will present the novel lattice and sub-system design, and show you the project main progresses since Jan. 2020.

Abstract

Sirius is a fourth-generation synchrotron light source that has been operational since 2020 at the Brazilian Synchrotron Light Laboratory (LNLS). Initial funding covered a total of 14 beamlines, six of which are currently open for users, and eight under commissioning or assembly, due in 2024. In a subsequent phase, 13 more beamlines are expected for the coming years. Thanks to the reduction in source sizes and the increase in brightness and coherence properties, new-generation synchrotrons open unprecedented research opportunities, pushing beamline instrumentation up for performance. This can often translate to requirements such as superior mechanical stability, more advanced motion options, faster and higher-resolution detectors, and larger computing power. With a long history of in-house instrumentation development, the engineering teams at the LNLS have been working on several high-performance opto-mechatronic systems for Sirius, including the High-Dynamic Double-Crystal Monochromator (HD-DCM), a family of exactly-constrained X-ray mirror systems, and X-ray nanoprobes. These projects, related to single-digit-nanometer positioning and optical figure quality, result from a combination of traditional synchrotron instrumentation technology with complementary tools and solutions recently incorporated from other industry segments. Systems engineering efforts and predictive design methodologies have enabled significantly improved project assertiveness, working towards not only higher spatial and time resolutions in experiments, but also higher efficiency in beamline throughput and operational robustness. This talk reviews Sirius's main nanopositioning and optical beamline systems, summarizing the current engineering framework, providing lessons learned, and discussing future opportunities.

Abstract

This talk will begin with a survey of the most common accelerator types and an introduction to charged particle beam dynamics. Both linear and circular machines will be covered, with emphasis on electron beam rather than proton or ion beams. For linear accelerators, an overview of microwave structures and sources will be given. More time will be spent on circular accelerators, covering the transverse beam dynamics concepts of orbit, phase space, beam emittance, betatron functions and envelope, dispersion, tunes, chromaticity with its correction and beam stability. Interaction of accelerator physics and technology are also discussed.