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Workshop on Beam-Induced Quenches

15–16 Sept 2014
CERN
Europe/Zurich timezone

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Session

Session 3: Heat Transfer R&D

16 Sept 2014, 09:00
30/7-018 - Kjell Johnsen Auditorium (CERN)

30/7-018 - Kjell Johnsen Auditorium

CERN

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Conveners

Session 3: Heat Transfer R&D

  • Bernardo Bordini (CERN)
  • Gerard Willering (CERN)

Description

The aim of the session is to present the state of the art in the study of heat transport from superconducting cables to liquid helium. Numerical models will be discussed, as well as the latest results of experimental work. We aim for a lively discussion on future experimental work to validate numerical models in the highly-relevant millisecond-loss regime (UFO losses in the LHC). Moreover, we want to devote one slot to the conception of an experimental program towards validated damage-levels for fast beam-loss events in superconducting accelerator magnets.

Presentation materials

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  1. 10. Steady-State Heat Transfer in the LHC Superconducting Coils: Status of Experiments and Modelling
    Pier Paolo Granieri (CERN)
    16/09/2014, 09:00
  2. 11. Possibilities of Finite Element Modelling for a Better Understanding of Heat Transfer in Rutherford-Type Cables
    Erwin Roland Bielert (CERN)
    16/09/2014, 09:40
    The results obtained with Finite Element models help to better understand the heat transfer mechanism in complex structures, like Nb-Ti Rutherford type cables. With FE models, it is possible to implement the real geometry with different levels of precision, giving the possibility to take into consideration the properties on interfaces between copper, helium and kapton, as well as phase changes...
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  3. 12. Modeling heat transfer to helium in the stability analysis of Rutherford cables
    Marco Breschi (U)
    16/09/2014, 10:10
    The main experimental results on the transient heat transfer from solid surfaces to liquid helium are summarized. Models of these phenomena in stability analyses of superconducting wires and cables are presented. A focus on the quench analysis of Rutherford cables subjected to the external heat disturbance due to Beam Losses is presented, showing the impact on stability margin of the heat...
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  4. 13. Transient heat and mass transfer to superfluid helium Application to superconducting magnet cooling
    Bertrand Baudouy (CEA Saclay)
    16/09/2014, 11:10
    Comprehending the cooling of superconducting magnets with superfluid helium requires the knowledge of heat and mass transfer in different size and time scales. Moreover, steady-state, transient and phase change must be considered in order to cover a wide spectrum of working conditions and thermal events to which these magnets are subjected. Focusing on the transient heat and mass transfer to...
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  5. 21. Development of a Novel Method for Exploration of the Thermal Response of Superconducting Cables to Pulse Heat Loads in Superfluid Helium
    Tiemo Winkler (Twente Technical University (NL))
    16/09/2014, 11:35
  6. 22. Stability measurements Rutherford type cables
    Dr Gerard Willering (CERN)
    16/09/2014, 11:50
  7. 15. Identification of Damage-Levels of SC Magnets for transient beam losses: Strategy and Plans
    Dr Daniel Wollmann (CERN)
    16/09/2014, 12:10
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