NDLI: Modeling Quench Protection Heater Delays in an HTS Coil

Content Provider	IEEE Xplore Digital Library
Author	Salmi, T. Stenvall, A.
Copyright Year	2002
Abstract	The purpose of this research was to investigate the efficiency of the state-of-the-art quench protection heater technology applied to a high-temperature superconductor (HTS)-based accelerator type magnet. The heater delays, i.e., the time delay between the heater activation and consequent normal zone initiation in the winding, were simulated using the 2-D thermal modelling tool CoHDA, which has been successfully used for low-temperature superconductor (LTS) coils. In addition to the quench onset criterion used for LTS, requiring the cable maximum temperature to reach the current sharing temperature (T_cs), a criterion accounting for the current redistribution within a cable was introduced in the model. The heater delays were analysed as a function of various heater parameters, their value ranges were based on the heaters in the recent LTS magnets: heater powers (PPH(t = 0) = 20-200 W/cm²), heating station lengths (down to 10 mm) and insulation thickness's (up to 150 μm Kapton). The simulated delays in the reference YBCO-cable (T_op = 4.5 K, I = 5 kA, B = 20 T (parallel to cable's wide surface), Tcs = 16.5 K) were mainly between 20 and 100 ms. The heater efficiency seriously decreased for T_cs above 20 K when the cable energy margin approached the energy provided by the protection heater. Although experiments are needed to confirm these results, it seems clear that heater based quench protection for HTS-based accelerator magnets requires significant technology developments.
Sponsorship	Council on Superconductivity Appl. Superconductivity Conference Inc MIT
Starting Page	1
Ending Page	5
Page Count	5
File Size	629190
File Format	PDF
ISSN	10518223
Volume Number	25
Issue Number	3
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Heating Delays Superconducting magnets Cable insulation High-temperature superconductors Coils Superconducting cables High Temperature Superconductors Protection heaters thermal modelling Quench protection High temperature superconductors (HTSs) protection heaters quench protection
Content Type	Text
Resource Type	Article
Subject	Condensed Matter Physics Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Reducing Modeling Domain to Speed-Up Quench Simulations of HTS Coils

Quench Protection Design of an 8-T Magnet Built With Low- and High-Temperature Superconducting Coils

A Novel Quench Protection Technique for HTS Coils

Analysis of Uncertainties in Protection Heater Delay Time Measurements and Simulations in Nb₃Sn High-Field Accelerator Magnets

The Impact of Protection Heater Delays Distribution on the Hotspot Temperature in a High-Field Accelerator Magnet

Thermal Quench in HTS Double Pancake Race Track Coil

Modeling of Minimum Energy Required to Quench an HTS Magnet With a Strip Heater

Determining the Operating Current of No-Insulation Field Coils in HTS Generators

Protection Heater Delay Time Optimization for High-Field $hbox{Nb}_{3}hbox{Sn}$ Accelerator Magnets

Modeling Quench Protection Heater Delays in an HTS Coil

Similar Documents

Reducing Modeling Domain to Speed-Up Quench Simulations of HTS Coils

Quench Protection Design of an 8-T Magnet Built With Low- and High-Temperature Superconducting Coils

A Novel Quench Protection Technique for HTS Coils

Analysis of Uncertainties in Protection Heater Delay Time Measurements and Simulations in Nb3Sn High-Field Accelerator Magnets

The Impact of Protection Heater Delays Distribution on the Hotspot Temperature in a High-Field Accelerator Magnet

Thermal Quench in HTS Double Pancake Race Track Coil

Modeling of Minimum Energy Required to Quench an HTS Magnet With a Strip Heater

Determining the Operating Current of No-Insulation Field Coils in HTS Generators

Protection Heater Delay Time Optimization for High-Field $hbox{Nb}_{3}hbox{Sn}$ Accelerator Magnets

Modeling Quench Protection Heater Delays in an HTS Coil

Analysis of Uncertainties in Protection Heater Delay Time Measurements and Simulations in Nb₃Sn High-Field Accelerator Magnets