Comparative analysis of electrostatic and electromagnetic turbulence in HL-2A tokamak edge plasmas
Simultaneous measurements of electrostatic and electromagnetic turbulence have been conducted in low-beta ( ${\beta _N}\sim0.65$ ) HL-2A plasmas using a reciprocating multi-probe array. Electrostatic fluctuation-driven particle flux exceeds electromagnetic-induced transport by 3–4 orders of magnitud...
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IOP Publishing
2025-01-01
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| Series: | Nuclear Fusion |
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| Online Access: | https://doi.org/10.1088/1741-4326/adf125 |
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| author | Y. Yu M. Xu L. Nie R. Ke T. Lan W.L. Zhong Z.B. Shi Z.H. Wang T. Wu C.Y. Xiao J.B. Yuan S.B. Gong H. Xu HL-2A team |
| author_facet | Y. Yu M. Xu L. Nie R. Ke T. Lan W.L. Zhong Z.B. Shi Z.H. Wang T. Wu C.Y. Xiao J.B. Yuan S.B. Gong H. Xu HL-2A team |
| author_sort | Y. Yu |
| collection | DOAJ |
| description | Simultaneous measurements of electrostatic and electromagnetic turbulence have been conducted in low-beta ( ${\beta _N}\sim0.65$ ) HL-2A plasmas using a reciprocating multi-probe array. Electrostatic fluctuation-driven particle flux exceeds electromagnetic-induced transport by 3–4 orders of magnitude. Electromagnetic turbulence in the 20–80 kHz range dominates particle transport while higher frequency electromagnetic fluctuations (80–200 kHz) show reduced impact, which contrasts with edge electrostatic turbulence. Time-resolved analysis of particle flux components reveals that phase coherence plays a dominant role in determining cross-field transport dynamics. Electromagnetic fluctuations demonstrate complex behavior as $\delta {B_r}$ increases, with counteracting transport components ${\Gamma _{ne - Br}}$ and ${\Gamma _{vt - Br}}$ of comparable magnitude in opposing directions, which could necessitate adjustments to existing electromagnetic turbulence theories. Strong nonlinear interaction between electrostatic and electromagnetic turbulence is observed and experimental identification of Geodesic Acoustic Mode (GAM) signatures in both turbulence spectra. Concurrent coupling of magnetohydrodynamic activity and GAM with electrostatic fluctuations is confirmed, suggesting potential energy transfer mechanisms between these modes. |
| format | Article |
| id | doaj-art-f6cf6667e9b2494794018bbbe291d45b |
| institution | DOAJ |
| issn | 0029-5515 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
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| series | Nuclear Fusion |
| spelling | doaj-art-f6cf6667e9b2494794018bbbe291d45b2025-08-20T02:47:58ZengIOP PublishingNuclear Fusion0029-55152025-01-0165808604510.1088/1741-4326/adf125Comparative analysis of electrostatic and electromagnetic turbulence in HL-2A tokamak edge plasmasY. Yu0https://orcid.org/0000-0002-3395-7744M. Xu1https://orcid.org/0009-0001-3059-7026L. Nie2R. Ke3https://orcid.org/0000-0003-0117-0098T. Lan4https://orcid.org/0000-0002-2785-5178W.L. Zhong5https://orcid.org/0000-0001-8217-9400Z.B. Shi6https://orcid.org/0000-0002-7640-9844Z.H. Wang7T. Wu8https://orcid.org/0000-0003-2269-1968C.Y. Xiao9https://orcid.org/0009-0003-4315-9310J.B. Yuan10https://orcid.org/0000-0002-2953-6066S.B. Gong11H. Xu12HL-2A team13Sino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University , Zhuhai 519082, ChinaSouthwestern Institute of Physics , Chengdu 610041, ChinaSouthwestern Institute of Physics , Chengdu 610041, ChinaSouthwestern Institute of Physics , Chengdu 610041, ChinaSchool of Nuclear Science and Technology, University of Science and Technology of China , Hefei 230026, ChinaSouthwestern Institute of Physics , Chengdu 610041, ChinaSouthwestern Institute of Physics , Chengdu 610041, ChinaSouthwestern Institute of Physics , Chengdu 610041, ChinaSouthwestern Institute of Physics , Chengdu 610041, ChinaSino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University , Zhuhai 519082, China; Southwestern Institute of Physics , Chengdu 610041, ChinaSouthwestern Institute of Physics , Chengdu 610041, ChinaSouthwestern Institute of Physics , Chengdu 610041, ChinaSino-French Institute of Nuclear Engineering and Technology, Sun Yat-sen University , Zhuhai 519082, China; Southwestern Institute of Physics , Chengdu 610041, ChinaSouthwestern Institute of Physics , Chengdu 610041, ChinaSimultaneous measurements of electrostatic and electromagnetic turbulence have been conducted in low-beta ( ${\beta _N}\sim0.65$ ) HL-2A plasmas using a reciprocating multi-probe array. Electrostatic fluctuation-driven particle flux exceeds electromagnetic-induced transport by 3–4 orders of magnitude. Electromagnetic turbulence in the 20–80 kHz range dominates particle transport while higher frequency electromagnetic fluctuations (80–200 kHz) show reduced impact, which contrasts with edge electrostatic turbulence. Time-resolved analysis of particle flux components reveals that phase coherence plays a dominant role in determining cross-field transport dynamics. Electromagnetic fluctuations demonstrate complex behavior as $\delta {B_r}$ increases, with counteracting transport components ${\Gamma _{ne - Br}}$ and ${\Gamma _{vt - Br}}$ of comparable magnitude in opposing directions, which could necessitate adjustments to existing electromagnetic turbulence theories. Strong nonlinear interaction between electrostatic and electromagnetic turbulence is observed and experimental identification of Geodesic Acoustic Mode (GAM) signatures in both turbulence spectra. Concurrent coupling of magnetohydrodynamic activity and GAM with electrostatic fluctuations is confirmed, suggesting potential energy transfer mechanisms between these modes.https://doi.org/10.1088/1741-4326/adf125electromagnetic turbulenceelectrostatic turbulenceMaxwell stressReynolds stress |
| spellingShingle | Y. Yu M. Xu L. Nie R. Ke T. Lan W.L. Zhong Z.B. Shi Z.H. Wang T. Wu C.Y. Xiao J.B. Yuan S.B. Gong H. Xu HL-2A team Comparative analysis of electrostatic and electromagnetic turbulence in HL-2A tokamak edge plasmas Nuclear Fusion electromagnetic turbulence electrostatic turbulence Maxwell stress Reynolds stress |
| title | Comparative analysis of electrostatic and electromagnetic turbulence in HL-2A tokamak edge plasmas |
| title_full | Comparative analysis of electrostatic and electromagnetic turbulence in HL-2A tokamak edge plasmas |
| title_fullStr | Comparative analysis of electrostatic and electromagnetic turbulence in HL-2A tokamak edge plasmas |
| title_full_unstemmed | Comparative analysis of electrostatic and electromagnetic turbulence in HL-2A tokamak edge plasmas |
| title_short | Comparative analysis of electrostatic and electromagnetic turbulence in HL-2A tokamak edge plasmas |
| title_sort | comparative analysis of electrostatic and electromagnetic turbulence in hl 2a tokamak edge plasmas |
| topic | electromagnetic turbulence electrostatic turbulence Maxwell stress Reynolds stress |
| url | https://doi.org/10.1088/1741-4326/adf125 |
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