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- Galvin, TomM&I Mat Ltd, Manchester M32 0ZD, England. (author)
Characterisation of SiC Varistor Quench Protection Operating at 4 Kelvin for Use With Superconducting Magnets
- Article/chapterEnglish2023
Publisher, publication year, extent ...
- IEEE,2023
- printrdacarrier
Numbers
- LIBRIS-ID:oai:DiVA.org:uu-499922
- https://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-499922URI
- https://doi.org/10.1109/TASC.2023.3247995DOI
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- Language:English
- Summary in:English
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- SwePubSwePub
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Notes
- Silicon carbide (SiC) composite high-energy varistors have been demonstrated as a viable alternative to linear resistors as energy extraction devices during an abrupt loss of superconductivity in a magnet, called a quench. These have typically been installed external to the cryostat at ambient temperatures, but for some superconducting magnets it may be beneficial to mount the varistors within the cryostat in vacuum, a gaseous environment, or submerged in liquid cryogens. Varistors are semiconductors and therefore exhibit a temperature-dependent voltage-current relationship, so characterising their behaviour at low temperatures is important to predict their energy extraction behaviour. In this paper we present characterisation data of SiC varistor devices from 4-300 K: voltage-current characteristics, thermal conductivity, specific heat capacity, thermal expansion, and flexural strength. These varistors are a candidate for protection at 1.9 K of the MCBY magnets, currently being built at Uppsala University for CERN.
Subject headings and genre
- TEKNIK OCH TEKNOLOGIER Elektroteknik och elektronik Annan elektroteknik och elektronik hsv//swe
- ENGINEERING AND TECHNOLOGY Electrical Engineering, Electronic Engineering, Information Engineering Other Electrical Engineering, Electronic Engineering, Information Engineering hsv//eng
- Varistors
- Superconducting magnets
- Temperature measurement
- Temperature
- Silicon carbide
- Temperature dependence
- Cryogenics
- Superconductor
- Quench Protection
- Energy Extraction
- Varistor
Added entries (persons, corporate bodies, meetings, titles ...)
- Kirby, GlynCERN, CH-1211 Geneva, Switzerland. (author)
- Pepitone, Kevin,Dr,1988-Uppsala universitet,FREIA(Swepub:uu)kevpe345 (author)
- Coll, DominicM&I Mat Ltd, Manchester M32 0ZD, England. (author)
- Twin, AndrewOxford Instruments, Abingdon OX13 5QX, England. (author)
- Warren, DavidOxford Instruments, Abingdon OX13 5QX, England. (author)
- Ball, StevenOxford Instruments, Abingdon OX13 5QX, England. (author)
- M&I Mat Ltd, Manchester M32 0ZD, England.CERN, CH-1211 Geneva, Switzerland. (creator_code:org_t)
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- In:IEEE transactions on applied superconductivity (Print): IEEE33:51051-82231558-2515
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