Quench simulation results for a 12-T twin-aperture dipole magnet

Da Cheng; Tiina Salmi; Qingjin Xu; Quanling Peng; Chengtao Wang; Yingzhe Wang; Ershuai Kong; Kai Zhang

doi:10.1016/j.cryogenics.2018.03.005

Quench simulation results for a 12-T twin-aperture dipole magnet

Da Cheng, Tiina Salmi, Qingjin Xu, Quanling Peng, Chengtao Wang, Yingzhe Wang, Ershuai Kong, Kai Zhang

Research output: Contribution to journal › Article › Scientific › peer-review

6 Citations (Scopus)

Abstract

A 12-T twin-aperture subscale dipole magnet is being developed for SPPC pre-study at the Institute of High Energy Physics (IHEP). The magnet is comprised of 6 double-pancake coils which include 2 Nb₃Sn coils and 4 NbTi coils. As the stored energy of the magnet is 0.452 MJ and the operation margin is only about 20% at 4.2 K, a quick and effective quench protection system is necessary during the test of this high field magnet. For the design of the quench protection system, attention was not only paid to the hotspot temperature and terminal voltage, but also the temperature gradient during the quench process due to the poor mechanical characteristics of the Nb₃Sn cables. With the adiabatic analysis, numerical simulation and the finite element simulation, an optimized protection method is adopted, which contains a dump resistor and quench heaters. In this paper, the results of adiabatic analysis and quench simulation, such as current decay, hot-spot temperature and terminal voltage are presented in details.

Original language	English
Pages (from-to)	13-19
Number of pages	7
Journal	Cryogenics
Volume	92
DOIs	https://doi.org/10.1016/j.cryogenics.2018.03.005
Publication status	Published - 1 Jun 2018
Publication type	A1 Journal article-refereed

Funding

The work is supported by the Hundred Talents Program funding of Chinese Academy of Sciences (CAS), the Key Research Program of the Chinese Academy of Sciences, Grant No. XDPB01, and the National Natural Science Foundation of China (Grant No. 11675193, U1632276, 11575214).

Keywords

Adiabatic analysis
Heater design
Quench protection
Quench simulation

Publication forum classification

Publication forum level 1

ASJC Scopus subject areas

General Materials Science
General Physics and Astronomy

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10.1016/j.cryogenics.2018.03.005

Cite this

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title = "Quench simulation results for a 12-T twin-aperture dipole magnet",

abstract = "A 12-T twin-aperture subscale dipole magnet is being developed for SPPC pre-study at the Institute of High Energy Physics (IHEP). The magnet is comprised of 6 double-pancake coils which include 2 Nb3Sn coils and 4 NbTi coils. As the stored energy of the magnet is 0.452 MJ and the operation margin is only about 20% at 4.2 K, a quick and effective quench protection system is necessary during the test of this high field magnet. For the design of the quench protection system, attention was not only paid to the hotspot temperature and terminal voltage, but also the temperature gradient during the quench process due to the poor mechanical characteristics of the Nb3Sn cables. With the adiabatic analysis, numerical simulation and the finite element simulation, an optimized protection method is adopted, which contains a dump resistor and quench heaters. In this paper, the results of adiabatic analysis and quench simulation, such as current decay, hot-spot temperature and terminal voltage are presented in details.",

keywords = "Adiabatic analysis, Heater design, Quench protection, Quench simulation",

author = "Da Cheng and Tiina Salmi and Qingjin Xu and Quanling Peng and Chengtao Wang and Yingzhe Wang and Ershuai Kong and Kai Zhang",

year = "2018",

month = jun,

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doi = "10.1016/j.cryogenics.2018.03.005",

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TY - JOUR

T1 - Quench simulation results for a 12-T twin-aperture dipole magnet

AU - Cheng, Da

AU - Salmi, Tiina

AU - Xu, Qingjin

AU - Peng, Quanling

AU - Wang, Chengtao

AU - Wang, Yingzhe

AU - Kong, Ershuai

AU - Zhang, Kai

PY - 2018/6/1

Y1 - 2018/6/1

N2 - A 12-T twin-aperture subscale dipole magnet is being developed for SPPC pre-study at the Institute of High Energy Physics (IHEP). The magnet is comprised of 6 double-pancake coils which include 2 Nb3Sn coils and 4 NbTi coils. As the stored energy of the magnet is 0.452 MJ and the operation margin is only about 20% at 4.2 K, a quick and effective quench protection system is necessary during the test of this high field magnet. For the design of the quench protection system, attention was not only paid to the hotspot temperature and terminal voltage, but also the temperature gradient during the quench process due to the poor mechanical characteristics of the Nb3Sn cables. With the adiabatic analysis, numerical simulation and the finite element simulation, an optimized protection method is adopted, which contains a dump resistor and quench heaters. In this paper, the results of adiabatic analysis and quench simulation, such as current decay, hot-spot temperature and terminal voltage are presented in details.

AB - A 12-T twin-aperture subscale dipole magnet is being developed for SPPC pre-study at the Institute of High Energy Physics (IHEP). The magnet is comprised of 6 double-pancake coils which include 2 Nb3Sn coils and 4 NbTi coils. As the stored energy of the magnet is 0.452 MJ and the operation margin is only about 20% at 4.2 K, a quick and effective quench protection system is necessary during the test of this high field magnet. For the design of the quench protection system, attention was not only paid to the hotspot temperature and terminal voltage, but also the temperature gradient during the quench process due to the poor mechanical characteristics of the Nb3Sn cables. With the adiabatic analysis, numerical simulation and the finite element simulation, an optimized protection method is adopted, which contains a dump resistor and quench heaters. In this paper, the results of adiabatic analysis and quench simulation, such as current decay, hot-spot temperature and terminal voltage are presented in details.

KW - Adiabatic analysis

KW - Heater design

KW - Quench protection

KW - Quench simulation

U2 - 10.1016/j.cryogenics.2018.03.005

DO - 10.1016/j.cryogenics.2018.03.005

M3 - Article

AN - SCOPUS:85044967086

SN - 0011-2275

VL - 92

SP - 13

EP - 19

JO - Cryogenics

JF - Cryogenics

ER -

Quench simulation results for a 12-T twin-aperture dipole magnet

Abstract

Funding

Keywords

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ASJC Scopus subject areas

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