Multiphysics Design and Optimization of Complex Vacuum Chambers (Phase II Final Technical Report)
Since the original third-generation synchrotron light source came online in Grenoble, France in 1994, these machines have served as unique instruments for prolific scientific research. Fourth-generation light sources are now being commissioned and designed to produce brighter X-rays by implementation of multibend achromats (MBA). These compact and dense magnet arrays are strategically placed along the storage ring to affect a drastic reduction of the electron beam emittance, which approaches the diffraction limit for the synchrotron radiation. The high gradient quadrupoles require magnet pole tips to be closer to the electron beam axis, which in turn requires smaller vacuum chambers to house the beam. The vacuum design is forced to accommodate unprecendented radiation loads while adhering to strict geometric constraints. This has exacerbated the design challenges which are inherently dictated by complex and coupled physical phenomena including high thermal stresses, outgassing of photodesorbed contaminants, and electromagnetic wakefields. In order to effectively manage these design challenges, vacuum scientists and engineers must conduct a multitude of high-fidelity simulations. Typically, these simulations are conducted with a variety of open-source and commercial software packages, each of which requires specialized expertise. In order to streamline the design process, RadiaSoft and ANL engineers have developed an integrated approach using COMSOL Multiphysics. During the Phase II project, we successfully used COMSOL to model the majority of required physics and made efforts to integrate external codes for ancillary calculations not directly suitable for COMSOL. This work has been generalized to accommodate arbitrary 3D vacuum chamber geometries and bending magnet sources and made available within a prototype browser-based GUI that can execute simulations in the cloud.
- Research Organization:
- RadiaSoft, LLC, Boulder, CO (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- DOE Contract Number:
- SC0015209
- OSTI ID:
- 1635367
- Type / Phase:
- SBIR (Phase II)
- Report Number(s):
- DOE_RadiaSoft_15209_ph2_final_report
- Country of Publication:
- United States
- Language:
- English
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