Complex bend: Strong-focusing magnet for low-emittance synchrotrons
| Autor: | Oleg Chubar, Yoshiteru Hidaka, S. Sharma, N. A. Mezentsev, Gang Wang, Charles Spataro, Timur Shaftan, Victor Smaluk |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
Physics
Diffraction Nuclear and High Energy Physics Brightness 010304 chemical physics Physics and Astronomy (miscellaneous) business.industry Surfaces and Interfaces 01 natural sciences Synchrotron law.invention Dipole Optics law Lattice (order) 0103 physical sciences Physics::Accelerator Physics lcsh:QC770-798 Thermal emittance lcsh:Nuclear and particle physics. Atomic energy. Radioactivity Strong focusing 010306 general physics business Storage ring |
| Zdroj: | Physical Review Accelerators and Beams, Vol 21, Iss 10, p 100703 (2018) |
| ISSN: | 2469-9888 |
| Popis: | Modern synchrotron light sources are competing intensively to increase x-ray brightness and, eventually, approach the diffraction limit, which sets the final goal of lattice emittance. All recent synchrotron facility upgrades follow the multibend achromat approach by arranging small horizontal beta function and dispersion inside discrete bending dipoles. In this paper we propose a concept of a lattice element that we call ``complex bend,'' which has the potential of becoming a main building block for low emittance lattices. The complex bend is a sequence of dipole poles interleaved with strong alternate focusing so as to maintain the beta function and dispersion oscillating at low values. Comprising the ring lattice with complex bends, instead of regular dipoles, will minimize the $H$-function and reduce horizontal emittance while localizing bending to a small fraction of the storage ring circumference, which should provide more space for insertion devices. In this paper we present the details of the complex bend, considerations regarding the choice of optimal parameters, and thoughts for its practical realization. We focus here on complex bend physics and engineering design, rather than integration of this complex bend into a specific ring lattice. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|