Author: Judin, V.
Paper Title Page
MOPPR021 Commissioning of a New Beam-position Monitoring System at ANKA 825
 
  • S. Marsching, N. Hiller, E. Huttel, V. Judin, B. Kehrer, M. Klein, C.A.J. Meuter, A.-S. Müller, M.J. Nasse, M. Schuh, N.J. Smale, M. Streichert
    KIT, Karlsruhe, Germany
  • G. Rehm
    Diamond, Oxfordshire, United Kingdom
 
  A new beam-position monitoring and diagnostic system is being commissioned at ANKA, the synchrotron light source of the Karlsruhe Institute of Technology. This system is based on 40 Libera Brilliance devices from Instrumentation Technologies. It provides turn-by-turn information about the beam position. This information can be used for beam diagnostics (e.g. finding the position where the beam is lost during injection phase) and can also form the base of a fast orbit-correction scheme. We have performed studies to assess the performance of the new BPM system in comparison to the old system being replaced. In order to optimize the commissioning process we have developed a scheme for switching to the new system gradually by integrating it with the MATLAB Middle-Layer using EPICS control software. In this contribution we present the results of our comparison of the two BPM systems and provide an insight into the experience gained during the commissioning process.  
 
TUPPP010 Spectral and Temporal Observations of CSR at ANKA 1623
 
  • V. Judin, N. Hiller, A. Hofmann, E. Huttel, B. Kehrer, M. Klein, S. Marsching, C.A.J. Meuter, A.-S. Müller, M. Schuh, M. Schwarz, N.J. Smale, M. Streichert
    KIT, Karlsruhe, Germany
  • M.J. Nasse
    Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
 
  Funding: This work has been supported by the Initiative and Networking Fund of the Helmholtz Association under contract number VH-NG-320.
ANKA is a synchrotron light source situated at the Karlsruhe Institute of Technology. Using dedicated low-α-optics at ANKA we can reduce the bunch length and generate Coherent Synchrotron Radiation (CSR). Studies of the coherent emission in the time domain allow us to gain an insight into the longitudinal bunch dynamics. These as well as the systematic investigations of the THz spectrum range can be used for benchmarking of theoretical predictions. In this paper we report about the recent progress in CSR observation using fast THz detectors and a Martin-Puplett spectrometer at the ANKA storage ring.
 
 
TUPPP011 Simulations of Fringe Fields and Multipoles for the ANKA Storage Ring Bending Magnets 1626
 
  • M. Streichert, M.J. Nasse
    Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany
  • V. Afonso Rodriguez, A. Bernhard, N. Hiller, E. Huttel, V. Judin, B. Kehrer, M. Klein, S. Marsching, C.A.J. Meuter, A.-S. Müller, M. Schwarz, N.J. Smale
    KIT, Karlsruhe, Germany
 
  Funding: This work has been supported by the Initiative and Networking Fund of the Helmholtz Association under contract number VH-NG-320.
ANKA is the synchrotron light source of the Karlsruhe Institute of Technology (KIT). With a maximum particle energy of 2.5 GeV, the storage ring lattice consists of 16 bending magnets with a nominal magnetic flux density of 1.5 T. For the beam dynamics simulations the consideration of the fringe fields and multipoles is essential. A reference measurement of the longitudinal magnetic flux density profile of a bending magnet exists for a current of 650 A, corresponding to a particle energy of 2.46 GeV. For lower beam energies where the magnets are no longer close to saturation, however, the exact density profiles may vary significantly. In order to derive fringe fields and multipole components for different beam energies, simulations of the magnetic flux density for different beam energies were conducted using a finite element method (FEM). We present the results of the simulations and demonstrate the improvements of the beam dynamics simulations in AT (Accelerator Toolbox).
 
 
WEPPP062 Characterization and Stabilization of Multi-Bunch Instabilities at the ANKA Storage Ring 2849
 
  • E. Huttel
    FZK, Karlsruhe, Germany
  • N. Hiller, E. Huttel, V. Judin, B. Kehrer, S. Marsching, A.-S. Müller, N.J. Smale
    KIT, Karlsruhe, Germany
 
  ANKA is a 2.5 GeV storage ring for synchrotron radiation. Up to 200 mA are accumulated at 0.5 GeV and then ramped to 2.5 GeV. In the past storage ring operation suffered from vertical multi-bunch instabilities. These could partially be cured by increased chromaticity, a large gap in the filling structure and by keeping the beam longitudinally unstable. A vertical digital bunch-by-bunch system from ITECH has been installed that allows an operation of the storage ring without exciting the longitudinal modes. In addition, the system allows analyzing multi-bunch instabilities both transverse and longitudinal and their dependence from cavity temperature, filling structure and chromaticity. This paper reports on our experience operating this system and presents an investigation of multi-bunch modes in the ANKA storage ring.