Author: Osborn, J.R.
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TUPMB025 Conceptual Design of Storage Ring Magnets for a Diffraction Limited Light Source Upgrade of ALS, ALS-U 1161
  • C.A. Swenson, D. Arbelaez, J.-Y. Jung, J.R. Osborn, S. Prestemon, D. Robin, D. Schlueter, C. Steier, C. Sun, E.J. Wallén
    LBNL, Berkeley, California, USA
  Funding: The Advanced Light Source is supported by the Director, Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy under Contract No. DE-AC02-05CH11231.
Lawrence Berkeley National Laboratory (LBNL) has been engaged in an internal laboratory directed research and development project to define a suitable accelerator physics lattice to support the diffraction limited upgrade of the Advanced Light Source*. Diffraction limited lattices require strong focusing elements throughout. Magnetics design is challenging in that the high gradient magnetic structures are required to operate in close proximity. Lattice development requires a coordinated engineering design effort to ensure the lattice design feasibility. We will present a review of the results of our magnet scoping studies as well as conceptual design specifications for the ALS-U lattice dipole, quadrupole, and sextupole magnet systems. Additionally we will present a conceptual design of refined super-bend magnets for the ALS-U lattice including a discussion of their potential impact on beam emittance.
* C. Steier, et al. Progress of the R&D towards a Diffraction Limited Upgrade of the Advanced Light Source, Proceedings of IPAC 2015,
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-TUPMB025  
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WEPOW051 R+D Progress Towards a Diffraction Limited Upgrade of the ALS 2962
  • C. Steier, A. Anders, J.M. Byrd, K. Chow, S. De Santis, R.M. Duarte, J.-Y. Jung, T.H. Luo, H. Nishimura, T. Oliver, J.R. Osborn, H.A. Padmore, G.C. Pappas, D. Robin, F. Sannibale, D. Schlueter, C. Sun, C.A. Swenson, M. Venturini, W.L. Waldron, E.J. Wallén, W. Wan, Y. Yang
    LBNL, Berkeley, California, USA
  Funding: This work was supported by the Laboratory Directed Research and Development Program of Lawrence Berkeley National Laboratory under U.S. Department of Energy Contract No. DE-AC02-05CH11231.
Improvements in brightness and coherent flux of about two orders of magnitude over operational storage ring based light sources are possible using multi bend achromat lattice designs. These improvements can be implemented as upgrades of existing facilities, like the proposed upgrade of the Advanced Light Source, making use of the existing infrastructure, thereby reducing cost and time needed to reach full scientific productivity on a large number of beamlines. An R&D program was started at LBNL to further develop the technologies necessary for diffraction-limited storage rings. It involves many areas, and focuses on the specific needs of soft x-ray facilities: NEG coating of small chambers, swap-out injection, bunch lengthening, magnets/radiation production, x-ray optics, and beam physics design optimization. Hardware prototypes have been built and concepts and equipment was tested in beam tests on the existing ALS.
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-WEPOW051  
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