Materials pp 299-306 | Cite as

Quench Protection Diodes for the Large Hadron Collider LHC at CERN

  • D. Hagedorn
  • W. Nägele
Part of the Advances in Cryogenic Engineering book series (ACRE, volume 38)


For the quench protection of the main ring dipole and quadrupole magnets for the proposed Large Hadron Collider at CERN two lines of approach have been pursued for the realization of a suitable high current by-pass element at liquid helium temperature. Two commercially available diodes of the HERA type connected in parallel can easily meet the requirements if a sufficient good current sharing is imposed by current balancing elements. Design criteria for these current balancing elements are derived from individual diode characteristics. Single diode elements of thin base region, newly developed in industry, have been successfully tested. The results are promising and, if the diodes can be made with reproducible characteristics, they will provide the preferred solution especially in view of radiation hardness.


Large Hadron Collider Heat Sink Liquid Helium Temperature Forward Voltage Current Balance 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    D. Hagedorn, W. Nägele, Radiation effects on high current diodes in an accelerator environment, at this conference.Google Scholar
  2. 2.
    K.H. Meß, Quench protection at HERA, “Proceedings of the 1987 IEEE Particle Accelerator Conference”, p. 1474.Google Scholar
  3. 3.
    PARAMOUNT at Haynes International, Inc., USA.Google Scholar
  4. 4.
    D. Hagedorn, F. Rodriguez-Mateos, Modelling of the quenching process in complex superconducting magnet systems, MT-12, June 1991, Leningrad, USSR.Google Scholar

Copyright information

© Springer Science+Business Media New York 1992

Authors and Affiliations

  • D. Hagedorn
    • 1
  • W. Nägele
    • 1
  1. 1.European Organization for Nuclear ResearchCERNGeneva 23Switzerland

Personalised recommendations