Author: Hubatka, M.
Paper Title Page
MOPGF171 Active Magnetic Bearings System Upgrade for LHC Cryogenic Cold Compressor, Radiations Mitigation Project (R2E) 480
 
  • M. Pezzetti
    CERN, Geneva, Switzerland
  • P. Arpaia
    Naples University Federico II, Science and Technology Pole, Napoli, Italy
  • M. Girone
    U. Sannio, Benevento, Italy
  • M. Hubatka
    MECOS AG, Winterthur, Switzerland
  
  Dur­ing the nor­mal op­er­a­tion of the Large Hadron Col­lider, the high hadron flux level in­duced sev­eral Sin­gle Event Er­rors (SEE fail­ure caused by a par­ti­cle pass­ing through) to the stan­dard elec­tron­ics in­stalled. Such events per­turbed LHC nor­mal op­er­a­tion. As a con­se­quence, a mit­i­ga­tion plan to min­imise ra­di­a­tion-in­duced fail­ures and op­ti­mise LHC op­er­a­tion was started: R2E mit­i­ga­tion pro­ject. This paper will deal with the mit­i­ga­tion prob­lem for LHC/P8 equip­ment and the main im­prove­ments for the equip­ment in P4, with spe­cial focus on the con­trollers for the Ac­tive Mag­netic Bear­ings used in the IHI-LINDE cold com­pres­sors. In ad­di­tion, a new ap­proach based on fre­quency re­sponse analy­sis to as­sess the cold com­pres­sor me­chan­i­cal qual­ity will be pre­sented. The hard­ware and soft­ware de­sign, im­ple­mented to in­crease the global re­li­a­bil­ity of the sys­tem, will be high­lighted. A cor­re­spond­ing ex­per­i­ment pro­to­col was de­vel­oped at CERN in col­lab­o­ra­tion with the MECOS Com­pany and the Uni­ver­si­ties of San­nio and Napoli Fed­erico II. Pre­lim­i­nary ex­per­i­men­tal re­sults show­ing the per­for­mance of the pro­posed ap­proach on a case study for the cold com­pres­sor in P4 will be fi­nally re­ported.  
Export • reference for this paper using ※ BibTeX, ※ LaTeX, ※ Text/Word, ※ RIS, ※ EndNote (xml)