Author: Mhaskar, S.P.
Paper Title Page
MOPRO103 The Double-double Bend Achromat (DDBA) Lattice Modification for the Diamond Storage Ring 331
 
  • R.P. Walker, M. Apollonio, C.P. Bailey, R. Bartolini, M.P. Cox, R.T. Fielder, N.P. Hammond, M.T. Heron, J. Kay, I.P.S. Martin, S.P. Mhaskar, G. Rehm, E.C.M. Rial, B. Singh, V.V. Smaluk, A. Thomson
    DLS, Oxfordshire, United Kingdom
  • R. Bartolini, T. Pulampong
    JAI, Oxford, United Kingdom
 
  The concept of converting individual cells of the Diamond Double Bend Achromat (DBA) lattice into a modified 4-bend achromat with a new straight section for insertion devices (IDs) in the middle of the arc, grew out of earlier studies of low emittance MBA lattices*, and was motivated by the need for additional ID straight sections, since all of the 22 ID straight sections in the Diamond storage ring are either occupied or have been allocated to future beamlines. Such a modification effectively replaces each DBA cell with two new DBA cells, hence the term Double-DBA or DDBA has come to be used for the project. Since the tangent point for bending magnet beamlines lies close to the start of the second dipole in the original DBA, this allows unused exit ports and spaces on the experimental hall which are available for future bending magnet beamlines to be used for higher performance ID beamlines. In this report we present an overview of the status of the project, the various accelerator physics and engineering studies that have been carried out, and plans for the implementation of one or two DDBA cells in Diamond.
* R. Bartolini, IPAC'13, p. 237
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOPRO103  
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TUPRO114 Magnet Design for the Diamond DDBA Lattice Upgrade 1319
 
  • R. Bartolini, C.P. Bailey, N.P. Hammond, R. Holdsworth, J. Kay, S.P. Mhaskar, E.C.M. Rial, R.P. Walker
    DLS, Oxfordshire, United Kingdom
  • T. Pulampong
    JAI, Oxford, United Kingdom
 
  The DDBA lattice upgrade for Diamond presents challenging requirements on the magnet system in order to satisfy the tight constraints on the beam optics. Advanced, combined function gradient dipoles and high gradient quadrupoles are needed. We present the tolerance specification, the design solutions and the measurement and alignment strategies.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-TUPRO114  
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