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Spencer, M. J.

Paper Title Page
TUPMN003 Lifetime Contribution Measurements at the Australian Synchrotron 914
 
  • M. J. Spencer
  • M. J. Boland, R. T. Dowd, G. LeBlanc, Y. E. Tan
    ASP, Clayton, Victoria
  
  There are always a number of factors that contribute to the lifetime of a stored particle beam. Measurements presented here show the relative importance of these effects during the commissioning of the Australian Synchrotron storage ring.  
THPAN001 LOCO at the Australian Synchrotron 3217
 
  • M. J. Spencer
  • M. J. Boland, R. T. Dowd, G. LeBlanc, Y. E. Tan
    ASP, Clayton, Victoria
  
  LOCO has been used during the commissioning of the Australian Synchrotron storage ring with a number of benefits. The LOCO (linear optics from close orbits) method compares a model response matrix to the real machine response matrix. Using this approach we are able to adjust the machine to match the ideal model. Results presented here show that LOCO has provided a high degree of control over a wide range of machine parameters.  
TUPMN007 Final Commissioning Results from the Injection System for the Australian Synchrotron Project 926
 
  • S. V. Weber
  • F. Bødker, H. Bach, N. Hauge, J. Kristensen, L. K. Kruse, S. P. Møller, S. M. Madsen
    Danfysik A/S, Jyllinge
  • M. J. Boland, R. T. Dowd, G. LeBlanc, M. J. Spencer, Y. E. Tan
    ASP, Clayton, Victoria
  • N. H. Hertel, J. S. Nielsen
    ISA, Aarhus
  
  Danfysik has delivered a full-energy turn-key injection system for the Australian Synchrotron. The system consists of a 100 MeV linac, a low-energy transfer beamline, a 130 m circumference 3-GeV booster, and a high energy transfer beamline. The booster lattice was designed to have many cells with combined-function magnets (dipole, quadrupole and sextupole fields) in order to reach a very small emittance. The injection system has been commissioned and found to deliver a beam with an emittance of less than 30 nm, and currents in single- and multi-bunch mode in excess of 0.5 and 5 mA, respectively, fulfilling the contractual performance specifications. The repetition frequency is 1 Hz. Results from the commissioning of the system will be presented.  
FRPMN003 Measurements of Impedance and Beam Instabilities at the Australian Synchrotron 3859
 
  • R. T. Dowd
  • M. J. Boland, G. LeBlanc, M. J. Spencer, Y. E. Tan
    ASP, Clayton, Victoria
  • J. M. Byrd, F. Sannibale
    LBNL, Berkeley, California
  
  In this paper we present the first measurements of machine impedance and observed beam instabilities at the Australian Synchrotron. Impedance measurements are made by studying the single bunch behaviour with beam current, using optical and X-ray diagnostic beamlines. An observed coupled-bunch instability, its cause and cure is also discussed.  
FRPMN004 Storage Ring Turn-By-Turn BPMs At The Australian Synchrotron 3865
 
  • Y. E. Tan
  • M. J. Boland, R. T. Dowd, G. LeBlanc, M. J. Spencer
    ASP, Clayton, Victoria
  
  The Australian Synchrotron's Storage Ring is equipped with a full compliment of 98 Libera Electron Beam Position Processors from I-Tech (EBPPs) [1]. The EBPPs are capable of measuring beam position data at turn-by-turn (TBT) rates and have long history buffers. TBT data from the EBPPs has been used to determine the linear optics of the storage ring lattice using techniques developed at other facilities. This is a useful complement to other methods of determining the linear optics such as LOCO. Characteristics of the EBPPs such as beam current dependence have been studied during commissioning and will also be presented.