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The Superconducting Toroid for the New International AXion Observatory (IAXO)

I. Shilon, A. Dudarev, H. Silva, U. Wagner, H. H. J. ten Kate
2014 IEEE transactions on applied superconductivity  
The coils optimization is shortly described as well as new concepts for cryostat, cold mass, supporting structure and the sun tracking system.  ...  Lastly, quench simulations are reported to demonstrate the system's safe quench protection scheme.  ...  The protection circuit is equipped with a timer delay so that false signals do not activate the protection system and lead to a bogus fast discharge.  ... 
doi:10.1109/tasc.2013.2280654 fatcat:5froxqdydbbdbabjxfdsblju6q

MuCool Superconducting Solenoid Quench Simulations and Test Stand at FNAL

V. Kashikhin, A. Bross, R. Carcagno, D. Orris, D. Turrioni
2013 IEEE transactions on applied superconductivity  
MuCool superconducting solenoid fabrication and preparation for tests are in progress now. The solenoid passive quench protection system based on cold diodes and shunt resistors.  ...  The paper presents the quench analysis of this solenoid based on 3D FEA solution of coupled transient electromagnetic and thermal problems. The simulations used the Vector Fields QUENCH code.  ...  It happen when all diodes open and the main path for all sections discharge goes through inner 10 mΩ resistors.  ... 
doi:10.1109/tasc.2013.2239336 fatcat:trc4tutfingtpbljc6exzvlgte

Quench Protection of a Nb$_3$Sn Superconducting Magnet System for a 45-GHz ECR Ion Source

E. Ravaioli, A. Ray Hafalia, M. Juchno, W. Lu, GL Sabbi, L. Sun, W. Wu, D. Xie, H. W. Zhao, S. J. Zheng
2018 IEEE transactions on applied superconductivity  
Furthermore, in order to enhance the redundancy of the quench protection system and reduce the peak voltages to ground, the implementation of a CLIQ (Coupling-Loss Induced Quench) system is considered.  ...  The resulting baseline quench protection strategy based on four independent energy extraction systems protecting the four magnets meets the quench protection requirements.  ...  The baseline design consists of four independent circuits, each protected by an energy-extraction system whose resistor is optimized for each specific magnet.  ... 
doi:10.1109/tasc.2018.2793891 fatcat:dimjgwg5vbfy3dgzylhvur3bcy

High voltage scheme optimization for secondary discharge mitigation in GEM-based detectors

L. Lautner, L. Fabbietti, P. Gasik, T. Klemenz
2019 Journal of Instrumentation  
We determine optimal values of the protection resistors and parasitic capacitances introduced by cables used in the system.  ...  The results of this paper may be used as a guideline for the optimization of more complicated multi-GEM detectors.  ...  Influence of R top resistance Usually, a protection resistor R top is mounted on a GEM in order to quench primary discharges, which may appear during detector operation, and protect the foil from damages  ... 
doi:10.1088/1748-0221/14/08/p08024 fatcat:c5smygmkdbg5xiuh25s7ztvhui

ATLAS Magnet Common Cryogenic, Vacuum, Electrical and Control Systems

P. Miele, F. Cataneo, N. Delruelle, C. Geich-Gimbel, F. Haug, G. Olesen, R. Pengo, E. Sbrissa, H. Tyrvainen, H.H.J. tenKate
2004 IEEE transactions on applied superconductivity  
The Magnet Safety System guarantees the magnet protection and human safety through slow and fast dump treatment.  ...  The Cryogenic System provides the cooling power for the 3 toroid magnets considered as a single cold mass (600 tons) and for the CS.  ...  Magnet Safety System The Magnet Safety System insures the magnet protection in stand alone mode with fast and slow discharge request.  ... 
doi:10.1109/tasc.2004.829704 fatcat:jkxzdi4mobgodf44htx7pxmtdi

ATLAS B0 toroid model coil test at CERN

P. Miele, E. Acerbi, R. Berthier, H. Boxman, F. Broggi, F. Cataneo, A. Dael, N. Dolgetta, A. Dudarev, A. Foussat, F. Haug, H. ten Kate (+7 others)
2002 IEEE transactions on applied superconductivity  
The Barrel Toroid, with overall dimensions of 20-m diameter by 26-m length, is made of eight individual coils symmetrically assembled around the central axis with a warm structure.  ...  The ATLAS superconducting magnet system consists of a Barrel Toroid, two End-Cap Toroids and a Central Solenoid.  ...  ACKNOWLEDGMENT The authors would like to thank the members of the magnet team at CEA (F), INFN-LASA (I), and CERN for their contributions to this paper.  ... 
doi:10.1109/tasc.2002.1018432 fatcat:q2hpingmwffknhzw5jxkecigha

New Superconducting Toroidal Magnet System for IAXO, the International AXion Observatory [article]

I. Shilon, A. Dudarev, H. Silva, U. Wagner, H. H. J. ten Kate
2013 arXiv   pre-print
A quench simulation confirmed the quench protection scheme.  ...  The system is sized 5.2 m in diameter and 25 m in length. Its peak magnetic field is 5.4 T with a stored energy of 500 MJ.  ...  The quench protection is based on an active protection system with multiple quench heaters positioned along each of the eight racetrack coils to enforce a fast and reliable quench propagation and so a  ... 
arXiv:1308.2526v1 fatcat:oidywfsmm5dstgitahfw3dsex4

The Superferric Cyclotron Gas Stopper Magnet Design and Fabrication

S. S. Chouhan, M. A. Green, G. Bollen, J. DeKamp, D. Lawton, C. Magsig, D. Morrissey, J. Ottarson, S. Schwarz, A. F. Zeller
2013 IEEE transactions on applied superconductivity  
The stopped radioactive ions using the cyclotron gas stopper magnet system will feed the existing program centered on precision mass measurements of exotic nuclei and laser spectroscopy.  ...  The entire system is mounted on a high voltage platform, and will be cooled by six cryocoolers. This paper presents the magnet design and discusses various design aspects of the magnet.  ...  However, we have decided to put diodes and a resistor across the coil to provide more quench protection system for the coils [6] .  ... 
doi:10.1109/tasc.2013.2239350 fatcat:mkznglg6ffhdzbossqrulzgycy

Wendelstein 7-X–Commissioning of the Superconducting Magnet System

Konrad Risse, Dietrich Birus, Stephan Bosch, Victor Bykov, Andre Carls, Chandra P. Dhard, Joris Fellinger, Thomas Monnich, Michael Nagel, Matthias Otte, Thomas Rummel, Matthias Schneider
2016 IEEE transactions on applied superconductivity  
In case of a quench, the magnet safety system has to be activated and a set of switches lead the current into dump resistors.  ...  The quench detection system checks permanently the superconducting system regarding the occurrence of a quench.  ...  ACKNOWLEDGMENT Sincere thanks to all my colleagues from the W7-X operations division, the magnet system group members and the complete W7-X team for their support.  ... 
doi:10.1109/tasc.2016.2527245 fatcat:k55er5zlhfc4veajjvkbotonui

Scaling of Superconducting Switches for Extraction of Magnetic Energy

Amalia Ballarino, Thomas Taylor
2010 IEEE transactions on applied superconductivity  
This leads to scaling laws for superconducting switches for this application which relate the operating current and stored energy of the magnet system, the type of superconductor, and the necessary size  ...  This is usually achieved by opening a contact breaker across a resistor in the circuit feeding the magnet.  ...  ACKNOWLEDGMENT The authors thank Karl Hubert Mess for drawing attention to this possibility, and Yifeng Yang and Stephen March for discussions on the use of HTS material for this type of device.  ... 
doi:10.1109/tasc.2010.2042044 fatcat:pjbjw6j5bberja2fbmsvb7e2oy

Charging magnet for the floating coil of LDX

A. Zhukovsky, J. Schultz, B. Smith, A. Radovinsky, D. Garnier, O. Filatov, V. Beljakov, S. Egorov, V. Kuchinsky, A. Malkov, E. Bondarchouk, V. Korsunsky (+1 others)
2001 IEEE transactions on applied superconductivity  
The magnet protection system has an external dump resistor, which dissipates most of the 12 MJ stored energy during a quench.  ...  The NbTi superconducting C-coil serves to charge/discharge inductively the floating superconducting magnet to/from 2277 A when it is resting in the charging port at the bottom of the LDX vacuum vessel.  ...  Their efforts have been vital for the C-coil project.  ... 
doi:10.1109/77.920214 fatcat:76wjer6dxnfsvoarcb3jgtaisu

Fabrication of the Superferric Cyclotron Gas-stopper Magnet at NSCL at Michigan State University

S S Chouhan, G Bollen, J DeKamp, M A Green, D Lawton, C Magsig, D J Morrissey, J Ottarson, S Schwarz, A F Zeller
2014 Journal of Physics, Conference Series  
This paper illustrates the design and the fabrication process for the cyclotron gas-stopper magnet that is being fabricated at MSU.  ...  Separate coils are mounted on the return yokes that have a total mass of about 167 metric tons of iron.  ...  An active quench protection system will be used to protect the magnet with an external fast dump resistor circuit.  ... 
doi:10.1088/1742-6596/507/3/032010 fatcat:5k4gnumaz5dsvicy6ufit3vn24

Dynamic-quenching of a single-photon avalanche photodetector using an adaptive resistive switch [article]

Jiyuan Zheng, Xingjun Xue, Yuan Yuan, Keye Sun, Cheng Ji, Daniel Rosenmann, Joe C. Campbell, Supratik Guha
2021 arXiv   pre-print
Single-photon avalanche diodes (SPAD) are often quenched by using a passive resistor in series. This limits the recovery speed of the SPAD.  ...  Using a Pt/Al2O3/Ag resistor with a commercial SPAD, we demonstrate avalanche pulse widths of ~37 ns, 8* smaller than a passively quenched approach.  ...  Acknowledgments: This is a preprint of an article published in Nature Communications. The final authenticated version is available online at:  ... 
arXiv:2105.11454v1 fatcat:qlkdhkya2bb5pkubyj7tp2zvsy

The Superconducting Magnet System for the Tokamak Physics Experiment

Dwight D. Lang, R.J. Bulmer, M.R. Chaplin, T.G. O'Connor, D.S. Slack, R. L. Wong, J. P. Zbasnik, J.H. Schultz, N. Diatchenko, D.B. Montgomery, R.D. Pillsbury, P. W. Wang (+3 others)
1994 Fusion Technology  
The copper fraction is primarily driven by optimizing the superconducting performance versus cost, while still providing adequate .e copper for protection in case of a quench.  ...  Quench The TF stored energy of 1.0 GJ is dissipated protection requirements have determined by splitting the TF system into two total amount of copper required, and hence segments, and discharging half  ... 
doi:10.13182/fst94-a40199 fatcat:5gixma3ojbbclp6vols2pnxpvy

Development of a superconducting protection switch for the HERA P-ring: design study and demonstration models

H.H.J. ten Kate, S.L. Wipf, B. ten Haken, L.J.M. van de Klundert
1988 IEEE transactions on magnetics  
The electrical circuit of the HERA p-ring is divided in octants whereby in the case of a quench the current has to be commutated to dumping resistors. A  ...  This large resistor is located outside the cryogenic system and consists of several meters of metal pipe.  ...  After the event of a quench in a main magnet the circuit current of 6.5 kA maximum has to be switched to dumping resistors in order to prevent damage to the coil structure and the conductors.  ... 
doi:10.1109/20.11443 fatcat:zon3ilnr3bapreqf6uk3biefai
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