Keyword: survey
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MOOCB02 A Common Operation Metrics for Third Generation Light Sources operation, experiment, feedback, insertion 56
 
  • A. Lüdeke
    PSI, Villigen PSI, Switzerland
  • M. Bieler
    DESY, Hamburg, Germany
  • J.-F. Lamarre
    SOLEIL, Gif-sur-Yvette, France
  • M. Pont
    CELLS-ALBA Synchrotron, Cerdanyola del Vallès, Spain
 
  High reliability is a very important goal for third generation light sources. Very often the beam availability is used as the operation metrics to measure the reliability of the accelerator. A survey at several light sources revealed that the calculation of this statistics varies significantly between facilities. This prevents a useful comparison of their reliabilities. The authors propose a specific metrics for the reliability of third generation light sources; a metrics that will allow a detailed and meaningful comparison of these particle accelerators.  
slides icon Slides MOOCB02 [0.701 MB]  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOOCB02  
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MOPRO099 Long-term Stability of the Diamond Light Source Storage Ring storage-ring, alignment, emittance, insertion 319
 
  • M. Apollonio, K.A.R. Baker, R. Bartolini, W.J. Hoffman, J. Kay, V.C. Kempson, I.P.S. Martin
    DLS, Oxfordshire, United Kingdom
  • R. Bartolini
    JAI, Oxford, United Kingdom
 
  The Diamond Storage Ring (SR) has been in operation since January 2007. This paper summarises a number of measurements that have been made over that period to monitor the SR stability in height and position including general survey, Hydrostatic Levelling System (HLS), horizontal and vertical magnet corrector strengths as well as Radio Frequency (RF) measurements that have given an indication of changing circumference.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOPRO099  
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MOPRO101 Transparent Re-alignment of the Diamond Storage Ring alignment, quadrupole, storage-ring, controls 325
 
  • M. Apollonio, R. Bartolini, W.J. Hoffman, E.C. Longhi, A.J. Rose, A. Thomson
    DLS, Oxfordshire, United Kingdom
  • R. Bartolini
    JAI, Oxford, United Kingdom
 
  72 out of the 74 girders on which the Diamond Storage Ring magnets are mounted, can in principle be moved along 5 degrees of freedom (sway, heave, yaw,pitch, roll) potentially allowing a thorough re-alignment of the machine. Previously conducted tests improved our knowledge of the system both in terms of simulations and comprehension of the control system we rely upon. In this report we present the results of more detailed tests which now give us full confidence in our ability to predict the results of any given set of girder moves. We also discuss possible ways of increasing the speed of the procedure, and a strategy to mitigate the impact of girder moves involving nearby beam lines.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOPRO101  
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TUPRO048 Dynamics of Twiss Parameters from the Geometrical Viewpoint emittance, framework, betatron 1135
 
  • V. Balandin, N. Golubeva
    DESY, Hamburg, Germany
 
  We show that with an appropriate parametrization the linear transport of the Twiss parameters can be viewed as a bilinear (or Moebius) map of the upper complex half-plane (which is the hyperbolic plane) into itself. Using then elementary techniques of hyperbolic geometry we classify transformations of the Twiss parameters into elliptic, hyperbolic and parabolic types and, for each type, present its typical phase space portraits.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-TUPRO048  
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WEPRI073 High Order Modes Survey and Mitigation of the CEBAF C100 Cryomodules HOM, cavity, impedance, cryomodule 2660
 
  • J. Guo, M. Stirbet, H. Wang, S. Wang
    JLab, Newport News, Virginia, USA
 
  Funding: Funding Agency: Authored by Jefferson Science Associates, LLC under U.S. DOE Contract No. DE-AC05-06OR23177
Ten new C100 cryomodules have been installed for the CEBAF 12GeV upgrade in the last few years. The high order modes (HOM) of these cryomodules need to be controlled to avoid beam breakup (BBU) instability. We surveyed the HOM for all the 80 cavities of the C100 modules in both the JLab cryomodule test facility (CMTF) and the CEBAF tunnel. Additional measures such as waveguide filters were applied to bring down out of spec modes. In this paper, we will present the HOM survey setup and results. The mitigation measures and their effects will also be discussed.
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-WEPRI073  
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THPME201 Survey Network of NESTOR Facility target, alignment, storage-ring, network 3754
 
  • O. Bezditko, V.E. Ivashchenko, I.M. Karnaukhov, A. Mytsykov, O.V. Ryezayev, A.Y. Zelinsky
    NSC/KIPT, Kharkov, Ukraine
 
  For successful operation of X-ray source NESTOR it is necessary that all the focusing elements should be installed in design position according to the designed lattice, which should provide a low emittance value and small beam size at the interaction point . Accuracies of NESTOR electromagnetic elements installation are 100 mkm in the transverse coordinate, 200 mkm in the longitudinal coordinate and 200 mrad for all three rotation freedom. To achieve these objectives coordinate net, which allows us to align the elements, was designed and developed in the hall of the NESTOR storage ring. The whole process is controlled by means of optical instruments and theodolite 3T2KP with angular accuracy of 2" and laser meter system LMS - 100, which measure the distance with micron accuracy. The final errors budget consists of the accuracy of the measuring instruments, the quality of elements manufacture and assembling. A well-planned methodology allows to realize the design parameters of the X-ray generator "NESTOR " and was proved by experiments of the facility.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME201  
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THPRI026 A Review on Accelerator Operator Training operation, ISAC, controls, proton 3822
 
  • A. Lüdeke, E. Zimoch
    PSI, Villigen PSI, Switzerland
 
  Operators of accelerator facilities have to be trained in order to safely operate their machines. While the amount of training varies between the different types of accelerators, many best-practices could be applied to the training of operators for a variety of different facilities. The aim of our study is to survey the best-practices for operator training for a larger number of accelerator facilities. The results may provide useful insights to advance the training-plans for operators of particle accelerators.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPRI026  
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