Author: Hertel, N.
Paper Title Page
MOPRO050 Status of the ASTRID2 Synchrotron Light Source 197
 
  • J.S. Nielsen, N. Hertel, S.P. Møller
    ISA, Aarhus, Denmark
 
  With regular user beam delivered to experiments, the commissioning of the ASTRID2 synchrotron light source is now mostly completed. The ring is running stable in top-up mode for beam currents up to 90 mA, with a lifetime of ~0.8 h at 90 mA. The orbit is controlled by a 10 Hz feedback loop, which includes feed forward loops when the insertion devices change gap. A similar 10 Hz loop compensates tune and beta function changes from the insertion devices. Some issues are still remaining. These include installation of a Landau cavity for lifetime improvements, a reduction in the heating of the in-vacuum ferrites of the injection bumpers, and a shielding of the stray magnetic field from the booster dipoles.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOPRO050  
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TUPRO080 Experience with a NdFeB based 1 Tm Dipole 1226
 
  • F. Bødker, L.O. Baandrup, A. Baurichter, N. Hauge, K.F. Laurberg, B.R. Nielsen, G. Nielsen
    Danfysik A/S, Taastrup, Denmark
  • O. Balling
    Aarhus University, Aarhus, Denmark
  • F.B. Bendixen, P. Kjeldsteen, P. Valler
    Sintex A/S, Hobro, Denmark
  • N. Hertel, S.P. Møller, J.S. Nielsen, H.D. Thomsen
    ISA, Aarhus, Denmark
 
  Funding: *Work supported by The Danish National Advanced Technology Foundation
A 30° Green Magnet based on permanent NdFeB magnets has been developed and installed in the injection line at the ASTRID2 synchrotron light source. The cost efficient design is optimized for a 1 T field at a length of 1 m using shaped iron poles to surpass the required field homogeneity. The inherent temperature dependence of NdFeB has been passively compensated to below 30 ppm/°C. A study of potential demagnetization effects has been performed by irradiation of NdFeB samples placed directly in a 100 MeV e-beam. A high permanent magnet work point was found to result in enhanced robustness, and the risk of demagnetization was found to be negligible for typical synchrotron applications. The magnet has successfully been in operation at ASTRID2 since autumn 2013.
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-TUPRO080  
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