Author: Bordini, B.
Paper Title Page
THPTS053 Design of a Fast Cycled Low Loss 6 T Model Dipole Cooling at 1.9 K 4221
 
  • A.D. Kovalenko, V.A.. Gromov, E.E. Perepelkin, G. Shirkov
    JINR, Dubna, Moscow Region, Russia
  • B. Bordini, D. Tommasini
    CERN, Geneva, Switzerland
  • A. Kolomiets
    ITEP, Moscow, Russia
  • S. Kozub, L. Tkachenko
    IHEP, Moscow Region, Russia
 
  The option being considered for the FCC-hh high energy injector is a superconducting synchrotron replacing the CERN SPS. The new machine would operate in a cycled mode also to feed experimental areas, much like the SPS nowadays. Due to this specific cycled operation, innovative design and development approaches is required to cope with the AC losses in the superconducting cables and iron yoke. The research joins experience accumulated at CERN and JINR respectively in the design and operation of large systems operated at 1.9 K and, in fast ramped and cycled magnets. The specified parameters are the following: magnet aperture -80 mm; aperture field - 6 T; field ramp 0.2-0.5 T/s; coil conductor - NbTi; magnetic field homogeneity between 0.12 and 6 T of the order of 5·10-4. The minimization of the cycling losses is particular important. Total thermal losses should be limited to tentatively < 2 W/m at 4.2 K. The magnet design, and the results of preliminary tests on a candidate NbTi-wire for building a model magnet are presented and discussed.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPTS053  
About • paper received ※ 14 May 2019       paper accepted ※ 22 May 2019       issue date ※ 21 June 2019  
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THPTS066 Beam Impact Experiment of 440GeV/p Protons on Superconducting Wires and Tapes in a Cryogenic Environment 4264
 
  • A. Will, A. Bernhard, A.-S. Müller
    KIT, Karlsruhe, Germany
  • Y. Bastian, B. Bordini, M. Favre, B. Lindstrom, M. Mentink, A. Monteuuis, A. Oslandsbotn, R. Schmidt, A.P. Siemko, K. Stachon, M. P. Vaananen, A.P. Verweij, A. Will, D. Wollmann
    CERN, Geneva, Switzerland
  • M. Bonura, C. Senatore
    UNIGE, Geneva, Switzerland
  • A. Usoskin
    BRUKER HTS GmbH, Alzenau, Germany
 
  The superconducting magnets used in high energy particle accelerators such as CERN’s LHC can be impacted by the circulating beam in case of specific failure cases. This leads to interaction of the beam particles with the magnet components, like the superconducting coils, directly or via secondary particle showers. The interaction leads to energy deposition in the timescale of microseconds and induces large thermal gradients within the superconductors in the order of 100 K/mm. To investigate the effect on the superconductors, an experiment at CERN’s HiRadMat facility was designed and executed, exposing short samples of Nb-Ti and Nb3Sn strands as well as YBCO tape in a cryogenic environment to microsecond 440 GeV/p proton beams. The irradiated samples were extracted and are being analyzed for their superconducting properties, such as the critical transport current. This paper describes the experimental setup as well as the first results of the visual inspection of the samples.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2019-THPTS066  
About • paper received ※ 13 May 2019       paper accepted ※ 23 May 2019       issue date ※ 21 June 2019  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)