Speaker
Tiemo Winkler
(Technology Department, CERN, Geneva 23, CH-1211, Switzerland)
Description
Management of transient heat deposition and extraction in superconducting magnets is becoming increasingly important for the purpose of bringing high energy particle accelerator performance to the limits of beam energy and intensity. Precise knowledge of transient heat deposition phenomena in the magnet cables will permit to push the operation of these magnets as close as possible to their current sharing limit, without unduly provoking magnet quenches. With the prospect of operating the LHC collider at CERN at higher beam energies and intensities an investigation into the response to transient heat loads of LHC magnets, operating in pressurized superfluid helium, is being performed.
The more frequently used approach mimics the cable geometry by resistive wires and uses Joule-heating to deposit energy. Instead, to approximate as close as possible the real magnet conditions, a novel method to deposit heat in cable stacks made out of superconducting magnet-cables has been developed. The goal is to measure the temperature evolution with time between the cable stack and the superfluid helium bath depending on heat load and pulse length. Heat generation and precise measurement of small temperature differences are major challenges. The functional principle and experimental setup are presented together with proof of principle measurements.
Primary author
Tiemo Winkler
(Technology Department, CERN, Geneva 23, CH-1211, Switzerland)
Co-authors
Johan Bremer
(Technology Department, CERN, Geneva 23, CH-1211, Switzerland)
Marcel ter Brake
(University of Twente, The Netherlands)
Rob Van Weelderen
(Technology Department, CERN, Geneva 23, CH-1211, Switzerland)
Torsten Koettig
(Technology Department, CERN, Geneva 23, CH-1211, Switzerland)
