Study of the radiated energy loss during massive gas injection mitigated disruptions on EAST
The MGI mitigated disruption experiments were carried out on EAST with a new fast gas controlling valve in 2012. Different amounts of noble gas He or mixed gas of 99% He+1% Ar are injected into plasma in current flat-top phase and current ramp-down phase separately. The initial results of MGI experi...
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Veröffentlicht in: | Journal of nuclear materials 2015-08, Vol.463, p.727-730 |
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container_title | Journal of nuclear materials |
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creator | Duan, Y.M. Hao, Z.K. Hu, L.Q. Wang, L. Xu, P. Xu, L.Q. Zhuang, H.D. |
description | The MGI mitigated disruption experiments were carried out on EAST with a new fast gas controlling valve in 2012. Different amounts of noble gas He or mixed gas of 99% He+1% Ar are injected into plasma in current flat-top phase and current ramp-down phase separately. The initial results of MGI experiments are described. The MGI system and the radiation measurement system are briefly introduced. The characteristics of radiation distribution and radiation energy loss are analyzed. About 50% of the stored thermal energy Wdia is dissipated by radiation during the entire disruption process and the impurities of C and Li from the PFC play important roles to radiative energy loss. The amount of the gas can affect the pre-TQ phase. Strong poloidal asymmetry of radiation begins to appear in the CQ phase, which is possibly caused by the plasma configuration changes as a result of VDE. No toroidal radiation asymmetry is observed presently. |
doi_str_mv | 10.1016/j.jnucmat.2014.10.067 |
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Different amounts of noble gas He or mixed gas of 99% He+1% Ar are injected into plasma in current flat-top phase and current ramp-down phase separately. The initial results of MGI experiments are described. The MGI system and the radiation measurement system are briefly introduced. The characteristics of radiation distribution and radiation energy loss are analyzed. About 50% of the stored thermal energy Wdia is dissipated by radiation during the entire disruption process and the impurities of C and Li from the PFC play important roles to radiative energy loss. The amount of the gas can affect the pre-TQ phase. Strong poloidal asymmetry of radiation begins to appear in the CQ phase, which is possibly caused by the plasma configuration changes as a result of VDE. 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Different amounts of noble gas He or mixed gas of 99% He+1% Ar are injected into plasma in current flat-top phase and current ramp-down phase separately. The initial results of MGI experiments are described. The MGI system and the radiation measurement system are briefly introduced. The characteristics of radiation distribution and radiation energy loss are analyzed. About 50% of the stored thermal energy Wdia is dissipated by radiation during the entire disruption process and the impurities of C and Li from the PFC play important roles to radiative energy loss. The amount of the gas can affect the pre-TQ phase. Strong poloidal asymmetry of radiation begins to appear in the CQ phase, which is possibly caused by the plasma configuration changes as a result of VDE. No toroidal radiation asymmetry is observed presently.</description><subject>Asymmetry</subject><subject>Disruption</subject><subject>Dissipation</subject><subject>Gas injection</subject><subject>Nuclear engineering</subject><subject>Radiation distribution</subject><subject>Radiation measurement</subject><subject>Valves</subject><issn>0022-3115</issn><issn>1873-4820</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2015</creationdate><recordtype>article</recordtype><recordid>eNqNkEtrwzAQhEVpoWnan1DQsRenK8m2lFMJIX1AoIekt4KQ5bUr40cq2YH8-zpN7u1pYXZmYD5C7hnMGLD0sZpV7WAb0884sHjUZpDKCzJhSoooVhwuyQSA80gwllyTmxAqAEjmkEzI56Yf8gPtCtp_IfUmd6bHnGKLvjzQuguB5oN3bUkbE4LbIy1NoK6t0Paua2njelf-RnIX_LA7ioGOj9Vis70lV4WpA96d75R8PK-2y9do_f7ytlysIytk0keKCyuTQqiYs0LIFESaWRtnmVS5YgwKg1Ypk6LIIGbCZDzhhZTCgCwMl4mYkodT78533wOGXjcuWKxr02I3BM2kBBGrOVP_sMapUrEa66ckOVmtHzF4LPTOu8b4g2agj-B1pc_g9RH8UR7Bj7mnUw7HyXuHXgfrsLWYOz9S03nn_mj4Acjkjtc</recordid><startdate>20150801</startdate><enddate>20150801</enddate><creator>Duan, Y.M.</creator><creator>Hao, Z.K.</creator><creator>Hu, L.Q.</creator><creator>Wang, L.</creator><creator>Xu, P.</creator><creator>Xu, L.Q.</creator><creator>Zhuang, H.D.</creator><general>Elsevier B.V</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7ST</scope><scope>C1K</scope><scope>SOI</scope><scope>7SR</scope><scope>7TB</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>FR3</scope><scope>H8D</scope><scope>JG9</scope><scope>L7M</scope></search><sort><creationdate>20150801</creationdate><title>Study of the radiated energy loss during massive gas injection mitigated disruptions on EAST</title><author>Duan, Y.M. ; Hao, Z.K. ; Hu, L.Q. ; Wang, L. ; Xu, P. ; Xu, L.Q. ; Zhuang, H.D.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c375t-823c75f38421f376036bcc4bb78d8110faec88a6e3b0413ab252f773a07fa2753</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2015</creationdate><topic>Asymmetry</topic><topic>Disruption</topic><topic>Dissipation</topic><topic>Gas injection</topic><topic>Nuclear engineering</topic><topic>Radiation distribution</topic><topic>Radiation measurement</topic><topic>Valves</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Duan, Y.M.</creatorcontrib><creatorcontrib>Hao, Z.K.</creatorcontrib><creatorcontrib>Hu, L.Q.</creatorcontrib><creatorcontrib>Wang, L.</creatorcontrib><creatorcontrib>Xu, P.</creatorcontrib><creatorcontrib>Xu, L.Q.</creatorcontrib><creatorcontrib>Zhuang, H.D.</creatorcontrib><creatorcontrib>EAST Team</creatorcontrib><collection>CrossRef</collection><collection>Environment Abstracts</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Environment Abstracts</collection><collection>Engineered Materials Abstracts</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Journal of nuclear materials</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Duan, Y.M.</au><au>Hao, Z.K.</au><au>Hu, L.Q.</au><au>Wang, L.</au><au>Xu, P.</au><au>Xu, L.Q.</au><au>Zhuang, H.D.</au><aucorp>EAST Team</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Study of the radiated energy loss during massive gas injection mitigated disruptions on EAST</atitle><jtitle>Journal of nuclear materials</jtitle><date>2015-08-01</date><risdate>2015</risdate><volume>463</volume><spage>727</spage><epage>730</epage><pages>727-730</pages><issn>0022-3115</issn><eissn>1873-4820</eissn><abstract>The MGI mitigated disruption experiments were carried out on EAST with a new fast gas controlling valve in 2012. Different amounts of noble gas He or mixed gas of 99% He+1% Ar are injected into plasma in current flat-top phase and current ramp-down phase separately. The initial results of MGI experiments are described. The MGI system and the radiation measurement system are briefly introduced. The characteristics of radiation distribution and radiation energy loss are analyzed. About 50% of the stored thermal energy Wdia is dissipated by radiation during the entire disruption process and the impurities of C and Li from the PFC play important roles to radiative energy loss. The amount of the gas can affect the pre-TQ phase. Strong poloidal asymmetry of radiation begins to appear in the CQ phase, which is possibly caused by the plasma configuration changes as a result of VDE. No toroidal radiation asymmetry is observed presently.</abstract><pub>Elsevier B.V</pub><doi>10.1016/j.jnucmat.2014.10.067</doi><tpages>4</tpages></addata></record> |
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subjects | Asymmetry Disruption Dissipation Gas injection Nuclear engineering Radiation distribution Radiation measurement Valves |
title | Study of the radiated energy loss during massive gas injection mitigated disruptions on EAST |
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