1.
|
Towards an Optimized Coupling-loss Induced Quench Protection System (CLIQ) for Quadrupole Magnets
/ Ravaioli, Emmanuele (CERN ; Twente U., Enschede) ; Datskov, Vladimir I (CERN) ; Desbiolles, Vincent (CERN) ; Feuvrier, Jerome (CERN) ; Kirby, Glyn (CERN) ; Maciejewski, Michal (CERN ; Lodz, Tech. U.) ; Sperin, Kevin A (CERN ; Birmingham U.) ; ten Kate, Herman H J (CERN ; Twente U., Enschede) ; Verweij, Arjan P (CERN) ; Willering, Gerard (CERN)
The recently developed Coupling-Loss-Induced Quench (CLIQ) protection system is a new method for initiating a fast and voluminous transition to the normal state for protecting high energy density superconducting magnets. Its simple and robust electrical design, its lower failure rate, and its more efficient energy deposition mechanism make CLIQ often preferable to other conventional quench protection methods. [...]
2015 - 6 p.
- Published in : Phys. Procedia 67 (2015) 215-220
Elsevier Open Access article: PDF;
In : 25th International Cryogenic Conference & International Cryogenic Materials Conference 2014, Twente U., Enschede, The Netherlands, 07 - 11 Jul 2014, pp.215-220
|
|
2.
|
|
3.
|
Protecting a Full-Scale Nb$_3$Sn Magnet with CLIQ, the New Coupling-Loss-Induced Quench System
/ Ravaioli, E (CERN ; Twente U., Enschede) ; Bajas, H (CERN) ; Datskov, V I (CERN) ; Desbiolles, V (CERN) ; Feuvrier, J (CERN) ; Kirby, G (CERN) ; Maciejewski, M (CERN ; Lodz, Tech. U.) ; Sabbi, G (LBL, Berkeley) ; ten Kate, H H J (CERN ; Twente U., Enschede) ; Verweij, A P (CERN)
A new protection system for superconducting magnets called coupling-loss induced quench system (CLIQ) has been recently developed at CERN. Recent tests on Nb-Ti coils have shown that CLIQ is a valid, efficient, and promising method for the protection of high-magnetic-field superconducting magnets. [...]
2015 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 25 (2015) 4001305
In : Applied Superconductivity Conference 2014, Charlotte, NC, USA, 10 - 15 Aug 2014, pp.4001305
|
|
4.
|
|
5.
|
CLIQ-Based Quench Protection of a Chain of High-Field Superconducting Magnets
/ Ravaioli, E (CERN ; Twente U., Enschede) ; Datskov, V I (CERN) ; Kirby, G (CERN) ; Maciejewski, M (CERN ; Lodz, Tech. U.) ; ten Kate, H H J (CERN ; Twente U., Enschede) ; Verweij, A P (CERN)
Conventional quench protection systems for high-magnetic-field superconducting magnets are based on external heaters composed of resistive strips in close contact with the coil and rely on thermal diffusion across insulation layers on the order of tens of micrometers. The large contact areas between the coil and the heater strips, and the thin insulation between them required for an effective protection constitute a significant risk of electrical breakdown and one of the most common causes of magnet damage. [...]
2016 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 26 (2016) 4000305
In : 24th International Conference on Magnet Technology, Seoul, Korea, 18 - 23 Oct 2015, pp.4000305
|
|
6.
|
Advanced Quench Protection for the Nb$_3$Sn Quadrupoles for the High Luminosity LHC
/ Ravaioli, E (CERN ; Twente U., Enschede) ; Auchmann, B (CERN) ; Datskov, V I ; Blomberg Ghini, J (CERN ; Norwegian U. Sci. Tech.) ; Dahlerup-Petersen, K (CERN) ; Fernandez Navarro, A M (CERN) ; Kirby, G (CERN) ; Maciejewski, M (CERN ; Lodz, Tech. U.) ; Rodriguez Mateos, F (CERN) ; ten Kate, H H J (CERN ; Twente U., Enschede) et al.
The goal of the High Luminosity LHC project is upgrading the LHC in order to increase its luminosity by a factor of five. To achieve this, 24 150-mm-aperture 12-T Nb_3Sn quadrupole magnets are to be installed close to the two interaction regions at ATLAS and CMS. [...]
2016 - 6 p.
- Published in : IEEE Trans. Appl. Supercond. 26 (2016) 4002006
In : 12th European Conference on Applied Superconductivity, Lyon, France, 06 - 10 Sep 2015, pp.4002006
|
|
7.
|
Lumped-Element Dynamic Electro-Thermal model of a superconducting magnet
/ Ravaioli, E (CERN ; Twente U., Enschede ; LBL, Berkeley) ; Auchmann, B (CERN) ; Maciejewski, M (CERN) ; ten Kate, H H J (CERN ; Twente U., Enschede) ; Verweij, A P (CERN)
Modeling accurately electro-thermal transients occurring in a superconducting magnet is challenging. The behavior of the magnet is the result of complex phenomena occurring in distinct physical domains (electrical, magnetic and thermal) at very different spatial and time scales. [...]
2016 - 11 p.
- Published in : Cryogenics 80 (2016) 346-356
In : CHATS on Applied Superconductivity 2015, Bologna, Italy, 14 - 16 Sep 2015, pp.346-356
|
|
8.
|
A new hybrid protection system for high-field superconducting magnets
/ Ravaioli, E (CERN ; Twente U., Enschede) ; Datskov, V I (CERN) ; Kirby, G (CERN) ; ten Kate, H H J (CERN ; Twente U., Enschede) ; Verweij, A P (CERN)
The new generation of high-field superconducting accelerator magnets poses a challenge concerning the protection of the magnet coil in the case of a quench. The very high stored energy per unit volume requires a fast and efficient quench heating system in order to avoid damage due to overheating. [...]
2014
- Published in : Supercond. Sci. Technol. 27 (2014) 044023
In : 11th European Conference on Applied Superconductivity, Genova, Italy, 15 - 19 Sep 2013, pp.044023
|
|
9.
|
CLIQ – Coupling-Loss Induced Quench System for Protecting Superconducting Magnets
Reference: Poster-2014-413
Keywords: Superconducting Magnet Magnet Protection CLIQ Modelling AC Losses
Created: 2014. -1 p
Creator(s): Ravaioli, E; Datskov, V I; Kirby, G; ten Kate, H H J; Verweij, A P
The recently developed Coupling-Loss-Induced Quench (CLIQ) protection system is a new method for initiating a fast and voluminous transition to the normal state for protecting high energy density superconducting magnets. Upon quench detection, CLIQ is triggered to generate an oscillating current in the magnet coil by means of a capacitive discharge. This in turn introduces a high coupling loss in the superconductor which provokes a quick transition to the normal state of the coil windings. The system is now implemented for the protection of a two meter long superconducting quadrupole magnet and characterized in the CERN magnet test facility. Various CLIQ configurations with different current injection points are tested and the results compared to similar transients lately measured with a not optimized configuration. Test results convincingly show that the newly tested design allows for a more global quench initiation and thus a faster discharge of the magnet energy. Moreover, the performance of CLIQ for reducing the hot spot temperature after a quench is compared to what can be achieved with conventional quench heaters. In addition, the measured transients are reproduced by means of a lumped-element dynamic electro-thermal model developed with Simulink©. After its validation, the model is now in use for simulating various discharges in order to find the optimum CLIQ configuration and operating parameters for the most homogeneous transition to the normal state of the coil windings and hence the lowest hot spot temperature. Finally, the integration of the new CLIQ system with conventional protection systems like quench heaters and energy extraction is thoroughly discussed for incompatibilities and effective synergies.
Presented at 10th International Conference on Web Information Systems and Technologies Barcelona, Spain 3 - 5 Apr 2014 2014 , (list conference papers)
Related links:
https://jobs.web.cern.ch/after-selection/info-activities
Used in
|
© CERN Geneva
Access to file
|
|
10.
|
First Implementation of the CLIQ Quench Protection System on a Full-Scale Accelerator Quadrupole Magnet
/ Ravaioli, E (CERN) ; Bajas, H (CERN) ; Datskov, V I (CERN) ; Desbiolles, V (CERN) ; Feuvrier, J (CERN) ; Kirby, G (CERN) ; Maciejewski, M (CERN) ; ten Kate, H H J (CERN) ; Verweij, A P (CERN) ; Willering, G (CERN)
The coupling-loss induced quench system (CLIQ) is an innovative method for the protection of high-field superconducting magnets. With respect to the conventional method based on quench heaters, it offers significant advantages in terms of electrical robustness and energy-deposition velocity. [...]
2016 - 5 p.
- Published in : IEEE Trans. Appl. Supercond. 26 (2016) 4702105
In : 12th European Conference on Applied Superconductivity, Lyon, France, 06 - 10 Sep 2015, pp.4702105
|
|