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Overview of recent HL-2A experiments

Since the last Fusion Energy Conference, significant progress has been made in the following areas. The first high coupling efficiency low-hybrid current drive (LHCD) with a passive-active multi-junction (PAM) antenna was successfully demonstrated in the H-mode on the HL-2A tokamak. Double critical...

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Published in:Nuclear fusion 2017-10, Vol.57 (10), p.102013
Main Authors: Duan, X.R., Liu, Yi, Xu, M., Yan, L.W., Xu, Y., Song, X.M., Dong, J.Q., Ding, X.T., Chen, L.Y., Lu, B., Liu, D.Q., Rao, J., Xuan, W.M., Yang, Q.W., Zheng, G.Y., Zou, X.L., Liu, Y.Q., Zhong, W.L., Zhao, K.J., Ji, X.Q., Mao, W.C., Wang, Q.M., Li, Q., Cao, J.Y., Cao, Z., Lei, G.J., Zhang, J.H., Li, X.D., Bai, X.Y., Cheng, J., Chen, W., Cui, Z.Y., Delpech, L., Diamond, P.H., Dong, Y.B., Ekedahl, A., Hoang, T., Huang, Y., Ida, K., Itoh, K., Itoh, S.-I., Isobe, M., Inagaki, S., Mazon, D., Morita, S., Peysson, Y., Shi, Z.B., Wang, X.G., Xiao, G.L., Yu, D.L., Yu, L.M., Zhang, Y.P., Zhou, Y., Cui, C.H., Feng, B.B., Huang, M., Li, Y.G., Li, B., Li, G.S., Li, H.J., Li, Qing, Peng, J.F., Wang, Y.Q., Yuan, B.S., Liu, Yong
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cited_by cdi_FETCH-LOGICAL-c354t-a029ced7dc92a0dc09466385ecfc224d3793ffde8c46514ce3f0f7083b74b58e3
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container_end_page
container_issue 10
container_start_page 102013
container_title Nuclear fusion
container_volume 57
creator Duan, X.R.
Liu, Yi
Xu, M.
Yan, L.W.
Xu, Y.
Song, X.M.
Dong, J.Q.
Ding, X.T.
Chen, L.Y.
Lu, B.
Liu, D.Q.
Rao, J.
Xuan, W.M.
Yang, Q.W.
Zheng, G.Y.
Zou, X.L.
Liu, Y.Q.
Zhong, W.L.
Zhao, K.J.
Ji, X.Q.
Mao, W.C.
Wang, Q.M.
Li, Q.
Cao, J.Y.
Cao, Z.
Lei, G.J.
Zhang, J.H.
Li, X.D.
Bai, X.Y.
Cheng, J.
Chen, W.
Cui, Z.Y.
Delpech, L.
Diamond, P.H.
Dong, Y.B.
Ekedahl, A.
Hoang, T.
Huang, Y.
Ida, K.
Itoh, K.
Itoh, S.-I.
Isobe, M.
Inagaki, S.
Mazon, D.
Morita, S.
Peysson, Y.
Shi, Z.B.
Wang, X.G.
Xiao, G.L.
Yu, D.L.
Yu, L.M.
Zhang, Y.P.
Zhou, Y.
Cui, C.H.
Feng, B.B.
Huang, M.
Li, Y.G.
Li, B.
Li, G.S.
Li, H.J.
Li, Qing
Peng, J.F.
Wang, Y.Q.
Yuan, B.S.
Liu, Yong
description Since the last Fusion Energy Conference, significant progress has been made in the following areas. The first high coupling efficiency low-hybrid current drive (LHCD) with a passive-active multi-junction (PAM) antenna was successfully demonstrated in the H-mode on the HL-2A tokamak. Double critical impurity gradients of electromagnetic turbulence were observed in H-mode plasmas. Various ELM mitigation techniques have been investigated, including supersonic molecular beam injection (SMBI), impurity seeding, resonant magnetic perturbation (RMP) and low-hybrid wave (LHW). The ion internal transport barrier was observed in neutral beam injection (NBI) heated plasmas. Neoclassical tearing modes (NTMs) driven by the transient perturbation of local electron temperature during non-local thermal transport events have been observed, and a new type of non-local transport triggered by the ion fishbone was found. A long-lasting runaway electron plateau was achieved after argon injection and the runaway current was successfully suppressed by SMBI. It was found that low-n Alfvénic ion temperature gradient (AITG) modes can be destabilized in ohmic plasmas, even with weak magnetic shear and low-pressure gradients. For the first time, the synchronization of geodesic acoustic mode (GAM) and magnetic fluctuations was observed in edge plasmas, revealing frequency entrainment and phase lock. The spatiotemporal features of zonal flows were also studied using multi-channel correlation Doppler reflectometers.
doi_str_mv 10.1088/1741-4326/aa6a72
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The first high coupling efficiency low-hybrid current drive (LHCD) with a passive-active multi-junction (PAM) antenna was successfully demonstrated in the H-mode on the HL-2A tokamak. Double critical impurity gradients of electromagnetic turbulence were observed in H-mode plasmas. Various ELM mitigation techniques have been investigated, including supersonic molecular beam injection (SMBI), impurity seeding, resonant magnetic perturbation (RMP) and low-hybrid wave (LHW). The ion internal transport barrier was observed in neutral beam injection (NBI) heated plasmas. Neoclassical tearing modes (NTMs) driven by the transient perturbation of local electron temperature during non-local thermal transport events have been observed, and a new type of non-local transport triggered by the ion fishbone was found. A long-lasting runaway electron plateau was achieved after argon injection and the runaway current was successfully suppressed by SMBI. It was found that low-n Alfvénic ion temperature gradient (AITG) modes can be destabilized in ohmic plasmas, even with weak magnetic shear and low-pressure gradients. For the first time, the synchronization of geodesic acoustic mode (GAM) and magnetic fluctuations was observed in edge plasmas, revealing frequency entrainment and phase lock. 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A long-lasting runaway electron plateau was achieved after argon injection and the runaway current was successfully suppressed by SMBI. It was found that low-n Alfvénic ion temperature gradient (AITG) modes can be destabilized in ohmic plasmas, even with weak magnetic shear and low-pressure gradients. For the first time, the synchronization of geodesic acoustic mode (GAM) and magnetic fluctuations was observed in edge plasmas, revealing frequency entrainment and phase lock. 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D.</creatorcontrib><creatorcontrib>Morita, S.</creatorcontrib><creatorcontrib>Peysson, Y.</creatorcontrib><creatorcontrib>Shi, Z.B.</creatorcontrib><creatorcontrib>Wang, X.G.</creatorcontrib><creatorcontrib>Xiao, G.L.</creatorcontrib><creatorcontrib>Yu, D.L.</creatorcontrib><creatorcontrib>Yu, L.M.</creatorcontrib><creatorcontrib>Zhang, Y.P.</creatorcontrib><creatorcontrib>Zhou, Y.</creatorcontrib><creatorcontrib>Cui, C.H.</creatorcontrib><creatorcontrib>Feng, B.B.</creatorcontrib><creatorcontrib>Huang, M.</creatorcontrib><creatorcontrib>Li, Y.G.</creatorcontrib><creatorcontrib>Li, B.</creatorcontrib><creatorcontrib>Li, G.S.</creatorcontrib><creatorcontrib>Li, H.J.</creatorcontrib><creatorcontrib>Li, Qing</creatorcontrib><creatorcontrib>Peng, J.F.</creatorcontrib><creatorcontrib>Wang, Y.Q.</creatorcontrib><creatorcontrib>Yuan, B.S.</creatorcontrib><creatorcontrib>Liu, Yong</creatorcontrib><creatorcontrib>HL-2A team</creatorcontrib><collection>CrossRef</collection><jtitle>Nuclear fusion</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Duan, X.R.</au><au>Liu, Yi</au><au>Xu, M.</au><au>Yan, L.W.</au><au>Xu, Y.</au><au>Song, X.M.</au><au>Dong, J.Q.</au><au>Ding, X.T.</au><au>Chen, L.Y.</au><au>Lu, B.</au><au>Liu, D.Q.</au><au>Rao, J.</au><au>Xuan, W.M.</au><au>Yang, Q.W.</au><au>Zheng, G.Y.</au><au>Zou, X.L.</au><au>Liu, Y.Q.</au><au>Zhong, W.L.</au><au>Zhao, K.J.</au><au>Ji, X.Q.</au><au>Mao, W.C.</au><au>Wang, Q.M.</au><au>Li, Q.</au><au>Cao, J.Y.</au><au>Cao, Z.</au><au>Lei, G.J.</au><au>Zhang, J.H.</au><au>Li, X.D.</au><au>Bai, X.Y.</au><au>Cheng, J.</au><au>Chen, W.</au><au>Cui, Z.Y.</au><au>Delpech, L.</au><au>Diamond, P.H.</au><au>Dong, Y.B.</au><au>Ekedahl, A.</au><au>Hoang, T.</au><au>Huang, Y.</au><au>Ida, K.</au><au>Itoh, K.</au><au>Itoh, S.-I.</au><au>Isobe, M.</au><au>Inagaki, S.</au><au>Mazon, D.</au><au>Morita, S.</au><au>Peysson, Y.</au><au>Shi, Z.B.</au><au>Wang, X.G.</au><au>Xiao, G.L.</au><au>Yu, D.L.</au><au>Yu, L.M.</au><au>Zhang, Y.P.</au><au>Zhou, Y.</au><au>Cui, C.H.</au><au>Feng, B.B.</au><au>Huang, M.</au><au>Li, Y.G.</au><au>Li, B.</au><au>Li, G.S.</au><au>Li, H.J.</au><au>Li, Qing</au><au>Peng, J.F.</au><au>Wang, Y.Q.</au><au>Yuan, B.S.</au><au>Liu, Yong</au><aucorp>HL-2A team</aucorp><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Overview of recent HL-2A experiments</atitle><jtitle>Nuclear fusion</jtitle><stitle>NF</stitle><addtitle>Nucl. Fusion</addtitle><date>2017-10-01</date><risdate>2017</risdate><volume>57</volume><issue>10</issue><spage>102013</spage><pages>102013-</pages><issn>0029-5515</issn><eissn>1741-4326</eissn><coden>NUFUAU</coden><abstract>Since the last Fusion Energy Conference, significant progress has been made in the following areas. The first high coupling efficiency low-hybrid current drive (LHCD) with a passive-active multi-junction (PAM) antenna was successfully demonstrated in the H-mode on the HL-2A tokamak. Double critical impurity gradients of electromagnetic turbulence were observed in H-mode plasmas. Various ELM mitigation techniques have been investigated, including supersonic molecular beam injection (SMBI), impurity seeding, resonant magnetic perturbation (RMP) and low-hybrid wave (LHW). The ion internal transport barrier was observed in neutral beam injection (NBI) heated plasmas. Neoclassical tearing modes (NTMs) driven by the transient perturbation of local electron temperature during non-local thermal transport events have been observed, and a new type of non-local transport triggered by the ion fishbone was found. A long-lasting runaway electron plateau was achieved after argon injection and the runaway current was successfully suppressed by SMBI. It was found that low-n Alfvénic ion temperature gradient (AITG) modes can be destabilized in ohmic plasmas, even with weak magnetic shear and low-pressure gradients. For the first time, the synchronization of geodesic acoustic mode (GAM) and magnetic fluctuations was observed in edge plasmas, revealing frequency entrainment and phase lock. The spatiotemporal features of zonal flows were also studied using multi-channel correlation Doppler reflectometers.</abstract><pub>IOP Publishing</pub><doi>10.1088/1741-4326/aa6a72</doi><tpages>11</tpages><oa>free_for_read</oa></addata></record>
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issn 0029-5515
1741-4326
language eng
recordid cdi_crossref_primary_10_1088_1741_4326_aa6a72
source Institute of Physics
subjects HL-2A
plasma physics
tokamak
title Overview of recent HL-2A experiments
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