Complex bend: Strong-focusing magnet for low-emittance synchrotrons
Abstract
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.
- Authors:
- Publication Date:
- Research Org.:
- Brookhaven National Lab. (BNL), Upton, NY (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1479142
- Alternate Identifier(s):
- OSTI ID: 1482365
- Report Number(s):
- BNL-209452-2018-JAAM
Journal ID: ISSN 2469-9888; PRABCJ; 100703
- Grant/Contract Number:
- SC0012704
- Resource Type:
- Published Article
- Journal Name:
- Physical Review Accelerators and Beams
- Additional Journal Information:
- Journal Name: Physical Review Accelerators and Beams Journal Volume: 21 Journal Issue: 10; Journal ID: ISSN 2469-9888
- Publisher:
- American Physical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 43 PARTICLE ACCELERATORS; beam dynamics; beam optics; cryogenics & vacuum technology; superconducting magnet calculations
Citation Formats
Wang, G., Shaftan, T., Smaluk, V., Mezentsev, N. A., Sharma, S., Chubar, O., Hidaka, Y., and Spataro, C. Complex bend: Strong-focusing magnet for low-emittance synchrotrons. United States: N. p., 2018.
Web. doi:10.1103/PhysRevAccelBeams.21.100703.
Wang, G., Shaftan, T., Smaluk, V., Mezentsev, N. A., Sharma, S., Chubar, O., Hidaka, Y., & Spataro, C. Complex bend: Strong-focusing magnet for low-emittance synchrotrons. United States. doi:10.1103/PhysRevAccelBeams.21.100703.
Wang, G., Shaftan, T., Smaluk, V., Mezentsev, N. A., Sharma, S., Chubar, O., Hidaka, Y., and Spataro, C. Thu .
"Complex bend: Strong-focusing magnet for low-emittance synchrotrons". United States. doi:10.1103/PhysRevAccelBeams.21.100703.
@article{osti_1479142,
title = {Complex bend: Strong-focusing magnet for low-emittance synchrotrons},
author = {Wang, G. and Shaftan, T. and Smaluk, V. and Mezentsev, N. A. and Sharma, S. and Chubar, O. and Hidaka, Y. and Spataro, C.},
abstractNote = {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.},
doi = {10.1103/PhysRevAccelBeams.21.100703},
journal = {Physical Review Accelerators and Beams},
number = 10,
volume = 21,
place = {United States},
year = {2018},
month = {10}
}
DOI: 10.1103/PhysRevAccelBeams.21.100703
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Future development plans for the MAX IV light source: Pushing further towards higher brightness and coherence
journal, April 2018
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Superconducting Wigglers
journal, May 2011
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