Quench protection for high Tc superconducting rotating gantry model magnet with I-V characteristics measured in the temperature range of 40–83 K
•Optimization of the quench protection for our HTS-based model magnet of the rotating gantry.•Dependence of the protection scheme on temperature/current is estimated on the simulation base.•Maximum elapsed time after the magnet quench is independent from the operation temperature.•Protection resisto...
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| Veröffentlicht in: | Cryogenics (Guildford) 2019-06, Vol.100, p.28-35 |
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| container_title | Cryogenics (Guildford) |
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| creator | Suzuki, K. Iio, M. Nakamoto, T. Ogitsu, T. Okada, R. Sugano, M. Yoshida, M. Yang, Y. |
| description | •Optimization of the quench protection for our HTS-based model magnet of the rotating gantry.•Dependence of the protection scheme on temperature/current is estimated on the simulation base.•Maximum elapsed time after the magnet quench is independent from the operation temperature.•Protection resistor and detection voltage must be |
| doi_str_mv | 10.1016/j.cryogenics.2019.03.009 |
| format | Article |
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We studied quench protection criteria for high transition-temperature superconducting (HTS) model magnet that was fabricated to demonstrate the possibility of HTS-based gantry. We aim to evaluate the frequency of “flux jump” events of this model magnet with varying operating temperature (TOP), which was observed during previous excitation tests. Therefore, we investigated the operation margin for various TOPs based on simulation and developed the quench protection system of this model magnet. A short sample of rare-earth barium copper oxide coated conductor, which was used for winding the HTS coil, was prepared and its current-voltage characteristics were measured between the temperature range of 40–83 K. The obtained results were then implemented to our stand-alone simulation to perform the quench study. The maximum allowed elapsed time after the magnet quench was investigated for different operating currents and TOPs by varying the detection voltages (Vdets). Then, a protection circuit was integrated into our simulation to optimize the size of dump resistor (Rdump) and Vdet. Finally, it was observed that Rdump must not be above 4 Ω and Vdet must be kept below 50 mV to protect the HTS model magnet.</description><identifier>ISSN: 0011-2275</identifier><identifier>EISSN: 1879-2235</identifier><identifier>DOI: 10.1016/j.cryogenics.2019.03.009</identifier><language>eng</language><publisher>Amsterdam: Elsevier Ltd</publisher><subject>Barium ; Coils (windings) ; Computer simulation ; Conductors ; Copper oxides ; Current voltage characteristics ; High [formula omitted] magnet ; Operating temperature ; Quench simulation ; Rare earth compounds ; Rare earth elements ; Simulation ; Superconductivity ; Transition temperature</subject><ispartof>Cryogenics (Guildford), 2019-06, Vol.100, p.28-35</ispartof><rights>2019 Elsevier Ltd</rights><rights>Copyright Elsevier BV Jun 2019</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.cryogenics.2019.03.009$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids></links><search><creatorcontrib>Suzuki, K.</creatorcontrib><creatorcontrib>Iio, M.</creatorcontrib><creatorcontrib>Nakamoto, T.</creatorcontrib><creatorcontrib>Ogitsu, T.</creatorcontrib><creatorcontrib>Okada, R.</creatorcontrib><creatorcontrib>Sugano, M.</creatorcontrib><creatorcontrib>Yoshida, M.</creatorcontrib><creatorcontrib>Yang, Y.</creatorcontrib><title>Quench protection for high Tc superconducting rotating gantry model magnet with I-V characteristics measured in the temperature range of 40–83 K</title><title>Cryogenics (Guildford)</title><description>•Optimization of the quench protection for our HTS-based model magnet of the rotating gantry.•Dependence of the protection scheme on temperature/current is estimated on the simulation base.•Maximum elapsed time after the magnet quench is independent from the operation temperature.•Protection resistor and detection voltage must be <4 Ω and <50 mV, respectively, at I = 300 A.
We studied quench protection criteria for high transition-temperature superconducting (HTS) model magnet that was fabricated to demonstrate the possibility of HTS-based gantry. We aim to evaluate the frequency of “flux jump” events of this model magnet with varying operating temperature (TOP), which was observed during previous excitation tests. Therefore, we investigated the operation margin for various TOPs based on simulation and developed the quench protection system of this model magnet. A short sample of rare-earth barium copper oxide coated conductor, which was used for winding the HTS coil, was prepared and its current-voltage characteristics were measured between the temperature range of 40–83 K. The obtained results were then implemented to our stand-alone simulation to perform the quench study. The maximum allowed elapsed time after the magnet quench was investigated for different operating currents and TOPs by varying the detection voltages (Vdets). Then, a protection circuit was integrated into our simulation to optimize the size of dump resistor (Rdump) and Vdet. Finally, it was observed that Rdump must not be above 4 Ω and Vdet must be kept below 50 mV to protect the HTS model magnet.</description><subject>Barium</subject><subject>Coils (windings)</subject><subject>Computer simulation</subject><subject>Conductors</subject><subject>Copper oxides</subject><subject>Current voltage characteristics</subject><subject>High [formula omitted] magnet</subject><subject>Operating temperature</subject><subject>Quench simulation</subject><subject>Rare earth compounds</subject><subject>Rare earth elements</subject><subject>Simulation</subject><subject>Superconductivity</subject><subject>Transition temperature</subject><issn>0011-2275</issn><issn>1879-2235</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><recordid>eNpFUd1qFjEQDUWhn63vMOD1rpPsT3YvtagtFkT46G3IJrO7-eiX1CSr9K7voO_hO_VJTK3g1RxmDjNnzmEMONYcef_2UJt4HxbyzqRaIB9rbGrE8YTt-CDHSoime8F2iJwXLLtT9iqlAyK2ohc79uvrRt6scBdDJpNd8DCHCKtbVtgbSNsdRRO83crML1BY-i9YtM_xHo7B0i0c9eIpww-XV7iqbsCsOmqTKbqUiyw4kk5bJAvOQ14JMh3LWp1LD6L2C0GYocXHh59D8_jw-_M5eznr20Sv_9Uztv_4YX9xWV1_-XR18e66okHKyjad5P04yIn6Tph2sBNNLY5odctbNJYsoZgH7CfRGRKS61lOnI_DOE260c0Ze_O8tjz_baOU1SFs0ZeLSohWSNlLKQvr_TOLipLvjqJKxhXPyLpYHFM2OMVRPYWhDup_GOopDIWNKmE0fwBdp4aC</recordid><startdate>201906</startdate><enddate>201906</enddate><creator>Suzuki, K.</creator><creator>Iio, M.</creator><creator>Nakamoto, T.</creator><creator>Ogitsu, T.</creator><creator>Okada, R.</creator><creator>Sugano, M.</creator><creator>Yoshida, M.</creator><creator>Yang, Y.</creator><general>Elsevier Ltd</general><general>Elsevier BV</general><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>F28</scope><scope>FR3</scope><scope>JG9</scope><scope>L7M</scope></search><sort><creationdate>201906</creationdate><title>Quench protection for high Tc superconducting rotating gantry model magnet with I-V characteristics measured in the temperature range of 40–83 K</title><author>Suzuki, K. ; Iio, M. ; Nakamoto, T. ; Ogitsu, T. ; Okada, R. ; Sugano, M. ; Yoshida, M. ; Yang, Y.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-e877-d35716987be652c48dbeb4090da4140cdede02f806b25ce271af7b11989bba3a3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><topic>Barium</topic><topic>Coils (windings)</topic><topic>Computer simulation</topic><topic>Conductors</topic><topic>Copper oxides</topic><topic>Current voltage characteristics</topic><topic>High [formula omitted] magnet</topic><topic>Operating temperature</topic><topic>Quench simulation</topic><topic>Rare earth compounds</topic><topic>Rare earth elements</topic><topic>Simulation</topic><topic>Superconductivity</topic><topic>Transition temperature</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Suzuki, K.</creatorcontrib><creatorcontrib>Iio, M.</creatorcontrib><creatorcontrib>Nakamoto, T.</creatorcontrib><creatorcontrib>Ogitsu, T.</creatorcontrib><creatorcontrib>Okada, R.</creatorcontrib><creatorcontrib>Sugano, M.</creatorcontrib><creatorcontrib>Yoshida, M.</creatorcontrib><creatorcontrib>Yang, Y.</creatorcontrib><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>ANTE: Abstracts in New Technology & Engineering</collection><collection>Engineering Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Cryogenics (Guildford)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Suzuki, K.</au><au>Iio, M.</au><au>Nakamoto, T.</au><au>Ogitsu, T.</au><au>Okada, R.</au><au>Sugano, M.</au><au>Yoshida, M.</au><au>Yang, Y.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Quench protection for high Tc superconducting rotating gantry model magnet with I-V characteristics measured in the temperature range of 40–83 K</atitle><jtitle>Cryogenics (Guildford)</jtitle><date>2019-06</date><risdate>2019</risdate><volume>100</volume><spage>28</spage><epage>35</epage><pages>28-35</pages><issn>0011-2275</issn><eissn>1879-2235</eissn><abstract>•Optimization of the quench protection for our HTS-based model magnet of the rotating gantry.•Dependence of the protection scheme on temperature/current is estimated on the simulation base.•Maximum elapsed time after the magnet quench is independent from the operation temperature.•Protection resistor and detection voltage must be <4 Ω and <50 mV, respectively, at I = 300 A.
We studied quench protection criteria for high transition-temperature superconducting (HTS) model magnet that was fabricated to demonstrate the possibility of HTS-based gantry. We aim to evaluate the frequency of “flux jump” events of this model magnet with varying operating temperature (TOP), which was observed during previous excitation tests. Therefore, we investigated the operation margin for various TOPs based on simulation and developed the quench protection system of this model magnet. A short sample of rare-earth barium copper oxide coated conductor, which was used for winding the HTS coil, was prepared and its current-voltage characteristics were measured between the temperature range of 40–83 K. The obtained results were then implemented to our stand-alone simulation to perform the quench study. The maximum allowed elapsed time after the magnet quench was investigated for different operating currents and TOPs by varying the detection voltages (Vdets). Then, a protection circuit was integrated into our simulation to optimize the size of dump resistor (Rdump) and Vdet. Finally, it was observed that Rdump must not be above 4 Ω and Vdet must be kept below 50 mV to protect the HTS model magnet.</abstract><cop>Amsterdam</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.cryogenics.2019.03.009</doi><tpages>8</tpages></addata></record> |
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| subjects | Barium Coils (windings) Computer simulation Conductors Copper oxides Current voltage characteristics High [formula omitted] magnet Operating temperature Quench simulation Rare earth compounds Rare earth elements Simulation Superconductivity Transition temperature |
| title | Quench protection for high Tc superconducting rotating gantry model magnet with I-V characteristics measured in the temperature range of 40–83 K |
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