Author: Lay, S.C.
Paper Title Page
MOPAB133 Optimisation of Electrical and Instrumentation Design for the Diamond Light Source DDBA Upgrade 448
 
  • A. Thomson, C.A. Abraham, M.T. Heron, S.C. Lay, G. Rehm, A.J. Rose, H.S. Shiers
    DLS, Oxfordshire, United Kingdom
  
  In planning the upgrade of one cell of the Diamond Storage Ring, the DDBA upgrade, it was evident that the electrical installation and commissioning would contribute a significant component of the overall installation time. Given the pressures to minimise the shutdown length, the electrical and instrumentation design was optimised for time effective installation and commissioning. This paper outlines the electrical and instrumentation design for DDBA; explores the installation time determining issues and how these were addressed; and reports on the lessons learnt from the actual installation and commissioning process.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-MOPAB133  
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TUPIK115 Control System Developments for the Diamond Light Source DDBA Upgrade 1996
 
  • W.A.H. Rogers, M.G. Abbott, K.A.R. Baker, N.W. Battam, M.J. Furseman, I.J. Gillingham, P. Hamadyk, M.T. Heron, D.G. Hickin, S.C. Lay, I.P.S. Martin, A.J. Rose
    DLS, Oxfordshire, United Kingdom
  
  Upgrading one Double Bend Achromat cell to a Double Double Bend Achromat (DDBA) cell in the Diamond Light Source storage ring* necessitated a broad range of changes to the overall control system. These changes covered developments to the interface layer of the controls system to incorporate changes to the underlying instrumentation, associated development of user interface, changes to real-time feedback and feed-forward processes and to the online accelerator model. Given the pressures to minimise the shutdown length, the control system developments were optimised for time effective installation and commissioning. This paper outlines the control system developments for DDBA, the management process and lessons learnt from this process.
* R.P. Walker et al., The Double-Double Bend Achromat (DDBA) Lattice Modification for the Diamond Storage Ring, Proc. IPAC 2014, MOPRO103, (2014) 		 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-TUPIK115  
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WEPVA136 Vacuum System for the Diamond Light Source DDBA Upgrade 3587
 
  • M.P. Cox, M.J. Duignan, R. Howard, S.C. Lay, A.G. Miller, H.S. Shiers, A. Wolfenden
    DLS, Oxfordshire, United Kingdom
  
  One cell of the Diamond Light Source (Diamond) storage ring was upgraded in late 2016 to a Double Double Bend Achromat (DDBA) configuration to provide an additional mid-achromat insertion device straight. For practical reasons it was decided to use discrete non-evaporable getter (NEG) pumps rather than NEG coatings. This paper outlines the vacuum design of the up-grade, the reasons for the choices made and the vacuum simulation tools used as well as describing the vacuum system engineering, assembly, installation and commissioning. The measured vacuum performance is found to be in close agreement with the simulations and a simple expression is derived for the beam gas lifetime.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2017-WEPVA136  
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