Quench protection heater studies for the 1-m model magnets for the LHC low-β quadrupoles

E. E. Burkhardt; A. Yamamoto; T. Nakamoto; T. Shintomi; K. Tsuchiya

doi:10.1109/77.828325

Quench protection heater studies for the 1-m model magnets for the LHC low-β quadrupoles

E. E. Burkhardt, A. Yamamoto, T. Nakamoto, T. Shintomi, K. Tsuchiya

Research output: Contribution to journal › Conference article › peer-review

5 Scopus citations

Abstract

In superconducting magnets with large energies, quench protection heaters (QPHs) are necessary to prevent localized quenches. If the full energy of a magnet is dissipated into a small volume, the magnet may suffer irreparable damage. The QPHs are used to heat the surface of the coil to increase the volume of the normal zone so the heat is dissipated over a larger area. As a result, the maximum temperature after a quench will be reduced. The KEK low-β quadrupole magnets for the Large Hadron Collider (LHC) have four QPHs on the outer surface of the coil. Several aspects of the performance of the QPHs for the KEK-LHC insertion quadrupole magnets have been studied. The time from firing the QPHs to quench vs. QPH-input-energy, the effects of varying quench-detection time on the magnet power supply, and the results of a normal training quench with no dump resistor and using the QPHs are reported and compared to a quench simulation code.

Original language	English
Pages (from-to)	681-684
Number of pages	4
Journal	IEEE Transactions on Applied Superconductivity
Volume	10
Issue number	1
DOIs	https://doi.org/10.1109/77.828325
State	Published - 2000
Externally published	Yes
Event	The 16th International Conference on Magnet Tehnolopgy - Tallahassee, FL, USA Duration: Sep 26 1999 → Oct 2 1999

Access to Document

10.1109/77.828325

Cite this

@article{6aa84c3482bb48e3962c7bf7b5c6d7f0,

title = "Quench protection heater studies for the 1-m model magnets for the LHC low-β quadrupoles",

abstract = "In superconducting magnets with large energies, quench protection heaters (QPHs) are necessary to prevent localized quenches. If the full energy of a magnet is dissipated into a small volume, the magnet may suffer irreparable damage. The QPHs are used to heat the surface of the coil to increase the volume of the normal zone so the heat is dissipated over a larger area. As a result, the maximum temperature after a quench will be reduced. The KEK low-β quadrupole magnets for the Large Hadron Collider (LHC) have four QPHs on the outer surface of the coil. Several aspects of the performance of the QPHs for the KEK-LHC insertion quadrupole magnets have been studied. The time from firing the QPHs to quench vs. QPH-input-energy, the effects of varying quench-detection time on the magnet power supply, and the results of a normal training quench with no dump resistor and using the QPHs are reported and compared to a quench simulation code.",

author = "Burkhardt, {E. E.} and A. Yamamoto and T. Nakamoto and T. Shintomi and K. Tsuchiya",

year = "2000",

doi = "10.1109/77.828325",

language = "English",

volume = "10",

pages = "681--684",

journal = "IEEE Transactions on Applied Superconductivity",

issn = "1051-8223",

publisher = "Institute of Electrical and Electronics Engineers",

number = "1",

note = "The 16th International Conference on Magnet Tehnolopgy ; Conference date: 26-09-1999 Through 02-10-1999",

}

TY - JOUR

T1 - Quench protection heater studies for the 1-m model magnets for the LHC low-β quadrupoles

AU - Burkhardt, E. E.

AU - Yamamoto, A.

AU - Nakamoto, T.

AU - Shintomi, T.

AU - Tsuchiya, K.

PY - 2000

Y1 - 2000

N2 - In superconducting magnets with large energies, quench protection heaters (QPHs) are necessary to prevent localized quenches. If the full energy of a magnet is dissipated into a small volume, the magnet may suffer irreparable damage. The QPHs are used to heat the surface of the coil to increase the volume of the normal zone so the heat is dissipated over a larger area. As a result, the maximum temperature after a quench will be reduced. The KEK low-β quadrupole magnets for the Large Hadron Collider (LHC) have four QPHs on the outer surface of the coil. Several aspects of the performance of the QPHs for the KEK-LHC insertion quadrupole magnets have been studied. The time from firing the QPHs to quench vs. QPH-input-energy, the effects of varying quench-detection time on the magnet power supply, and the results of a normal training quench with no dump resistor and using the QPHs are reported and compared to a quench simulation code.

AB - In superconducting magnets with large energies, quench protection heaters (QPHs) are necessary to prevent localized quenches. If the full energy of a magnet is dissipated into a small volume, the magnet may suffer irreparable damage. The QPHs are used to heat the surface of the coil to increase the volume of the normal zone so the heat is dissipated over a larger area. As a result, the maximum temperature after a quench will be reduced. The KEK low-β quadrupole magnets for the Large Hadron Collider (LHC) have four QPHs on the outer surface of the coil. Several aspects of the performance of the QPHs for the KEK-LHC insertion quadrupole magnets have been studied. The time from firing the QPHs to quench vs. QPH-input-energy, the effects of varying quench-detection time on the magnet power supply, and the results of a normal training quench with no dump resistor and using the QPHs are reported and compared to a quench simulation code.

UR - http://www.scopus.com/inward/record.url?scp=0033901175&partnerID=8YFLogxK

U2 - 10.1109/77.828325

DO - 10.1109/77.828325

M3 - Conference article

AN - SCOPUS:0033901175

SN - 1051-8223

VL - 10

SP - 681

EP - 684

JO - IEEE Transactions on Applied Superconductivity

JF - IEEE Transactions on Applied Superconductivity

IS - 1

T2 - The 16th International Conference on Magnet Tehnolopgy

Y2 - 26 September 1999 through 2 October 1999

ER -

Quench protection heater studies for the 1-m model magnets for the LHC low-β quadrupoles

Abstract

Access to Document

Other files and links

Fingerprint

Cite this