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Martin, I. P.S.

Paper Title Page
WEPC002 Analysis of Beam Orbit Stability and Ground Vibrations at the Diamond Storage Ring 1980
 
  • R. Bartolini, H. C. Huang, J. Kay, I. P.S. Martin
    Diamond, Oxfordshire
  
  With the aim of understanding and improving the beam orbit stability at the Diamond storage ring we launched an extensive campaign of ground and magnets vibration measurements in order to identify the sources of ground vibration and how they affect the beam orbit stability through the girder resonances. We present here the results of the measurements performed during 2007 along with a discussion of the possible remedies and the implications for the orbit feedback systems.  
WEPC044 Top-Up Safety Simulations for the Diamond Storage Ring 2085
 
  • I. P.S. Martin, C. P. Bailey, E. C. Longhi, R. P. Walker
    Diamond, Oxfordshire
  • R. Bartolini, I. P.S. Martin
    JAI, Oxford
  
  To ensure that it is not possible for a train of injected electron bunches to pass down an open beam-line during top-up operation at the Diamond Light Source, an extensive program of tracking studies has been performed. Various error scenarios have been investigated, with realistic magnetic field, trajectory, aperture and energy errors all taken into account. We describe the tracking methods used, scenarios considered and the interlocks required in order to maintain user safety during top-up operation.  
WEPC057 Preparation for Top-up Operation at Diamond 2121
 
  • R. P. Walker, P. T. Bonner, F. Burge, Y. S. Chernousko, C. Christou, J. A. Dobbing, M. T. Heron, V. C. Kempson, I. P.S. Martin, G. Rehm, R. J. Rushton, S. J. Singleton, M. C. Wilson
    Diamond, Oxfordshire
  • R. Bartolini
    JAI, Oxford
  
  We report on progress towards top-up operation of Diamond. We describe the extensive safety assessment that has carried out, including the measurements and simulations to assess the potential radiation doses in the case of poor injection efficiency or a top-up "accident", and the various levels of safety measures - procedures, software limits and personnel safety system interlocks - that have been implemented. We describe the top-up control algorithm, the technique used to maintain a given arbitrary filling pattern and the performance in practise. The work carried out to reduce the effect of the injection kickers on the stored beam is described, and the effect of the residual disturbance on user operation is discussed. The modifications to the timing system to provide hardware and software gating signals, and experience with the use of these, are also described.  
WEPC119 First Year's Experience of Diamond Insertion Devices 2285
 
  • E. C. Longhi, R. T. Fielder, I. P.S. Martin, J. C. Schouten, B. Singh
    Diamond, Oxfordshire
  • R. Bartolini
    JAI, Oxford
  
  Diamond was commissioned at 3GeV with seven insertion devices (IDs) already installed. The phase 1 IDs include five in-vacuum permanent magnet undulators, an APPLE–2 variable polarization device, and a superconducting wiggler. Since initial commissioning of the ring, three more in-vacuum undulators have been installed, and another three devices will be installed in the coming year. In this paper, we describe commissioning, characterizing, and operating with these IDs.  
THPC025 Further Advances in Understanding and Optimising Beam Dynamics in the Diamond Storage Ring 3032
 
  • I. P.S. Martin, R. T. Fielder, E. C. Longhi, B. Singh
    Diamond, Oxfordshire
  • R. Bartolini
    JAI, Oxford
  
  We report the results of recent beam dynamics studies of the Diamond storage ring. These studies were aimed at both improving our understanding of the machine operation as well as establishing a reliable, well corrected lattice with long lifetime and high injection efficiency suitable for later top-up operation. Particular attention has been given to measuring and controlling the linear optics of the lattice, to determining the various contributions to the overall beam lifetime and to optimising the sextupole strengths for good on and off momentum dynamic aperture. For each topic, detailed comparisons with model predictions are also described.  
WEPC044 Top-Up Safety Simulations for the Diamond Storage Ring 2085
 
  • I. P.S. Martin, C. P. Bailey, E. C. Longhi, R. P. Walker
    Diamond, Oxfordshire
  • R. Bartolini, I. P.S. Martin
    JAI, Oxford
  
  To ensure that it is not possible for a train of injected electron bunches to pass down an open beam-line during top-up operation at the Diamond Light Source, an extensive program of tracking studies has been performed. Various error scenarios have been investigated, with realistic magnetic field, trajectory, aperture and energy errors all taken into account. We describe the tracking methods used, scenarios considered and the interlocks required in order to maintain user safety during top-up operation.  
THPC053 Turn-by-turn Data Analysis at the Diamond Storage Ring 3101
 
  • R. Bartolini, I. P.S. Martin, G. Rehm, J. Rowland
    Diamond, Oxfordshire
  
  The Diamond Storage Ring has been recently equipped with a set of two pinger magnets that can excite betatron oscillations to large amplitudes in both planes of motion. In conjunction with the turn-by-turn capabilities available at all BPMs, the system provides a powerful diagnostic tools for the characterisation of the linear and non-linear beam dynamics of the electron beam in the storage ring. We report the first results on the application of the Frequency Map Analysis and the measurement of the resonant driving terms at the Diamond Storage Ring.