Application of multi-frequency doppler backscattering for studying edge localized modes at the Globus-M2 tokamak

Cover Page

Cite item

Full Text

Abstract

The high-confinement mode in tokamaks (H-mode) is characterized by high pressure gradients at plasma edge, which results in the appearance of edge localized modes (ELMs). They are studied at the Globus-M2 spherical tokamak too, where edge localized modes are observed mainly in regimes with neutral beam injection. One of the ways for studying ELMs is the use of the Doppler backscattering (DBS) diagnostics installed at Globus-M2. It makes possible to estimate the amplitude of plasma density fluctuations and measure the radial electric field Er. In this work, the effect of edge localized modes on the Er field is studied in the radial range 0.4 < ρ < 1.1. It is shown that during ELMs the electric field increases in the entire measurement range. This indicates that ELMs affect the inner plasma regions as well. This is not consistent with the general ideas concerning the peripheral localization of ELMs, but is confirmed experimentally not only at Globus-M2. In addition, the results for the regime with ELMs are compared with those for the regime with limit cycle oscillations (LCOs) and it is shown that during LCOs such effect is not observed.

About the authors

A. Y. Tokarev

Peter the Great St. Petersburg Polytechnic University

Author for correspondence.
Email: tokarev_ayu@spbstu.ru
Russian Federation, St. Petersburg, 195251

A. Y. Yashin

Peter the Great St. Petersburg Polytechnic University

Email: tokarev_ayu@spbstu.ru
Russian Federation, St. Petersburg, 195251

A. M. Ponomarenko

Peter the Great St. Petersburg Polytechnic University

Email: tokarev_ayu@spbstu.ru
Russian Federation, St. Petersburg, 195251

V. K. Gusev

Ioffe Institute, Russian Academy of Sciences

Email: tokarev_ayu@spbstu.ru
Russian Federation, St. Petersburg, 194021

N. S. Zhiltsov

Ioffe Institute, Russian Academy of Sciences

Email: tokarev_ayu@spbstu.ru
Russian Federation, St. Petersburg, 194021

G. S. Kurskiev

Ioffe Institute, Russian Academy of Sciences

Email: tokarev_ayu@spbstu.ru
Russian Federation, St. Petersburg, 194021

V. B. Minaev

Ioffe Institute, Russian Academy of Sciences

Email: tokarev_ayu@spbstu.ru
Russian Federation, St. Petersburg, 194021

Yu. V. Petrov

Ioffe Institute, Russian Academy of Sciences

Email: tokarev_ayu@spbstu.ru
Russian Federation, St. Petersburg, 194021

N. V. Sakharov

Ioffe Institute, Russian Academy of Sciences

Email: tokarev_ayu@spbstu.ru
Russian Federation, St. Petersburg, 194021

V. Solokha

Peter the Great St. Petersburg Polytechnic University; Ioffe Institute, Russian Academy of Sciences

Email: tokarev_ayu@spbstu.ru
Russian Federation, St. Petersburg, 195251; St. Petersburg, 194021

V. A. Velizhanin

Peter the Great St. Petersburg Polytechnic University

Email: tokarev_ayu@spbstu.ru
Russian Federation, St. Petersburg, 195251

References

  1. Wagner F., Becker G., Behringer K., Campbell D., Eberhagen A., Engelhardt W., Fussmann G., Gehre O., Gernhardt J., Gierke G.V.,, Haas G., Huang M., Karger F., Keilhacker M., Klüber O., Kornherr M., Lackner K., Lisitano G., Lister G.G., Mayer H.M., Meisel D., Müller E.R., Murmann H., Niedermeyer H., Poschenrieder W., Rapp H., Röhr H., Schneider F., Siller G., Speth E., Stäbler A., Steuer K.H., Venus G., Vollmer O., Yü Z. // Phys. Rev. Lett. 1982 V. 49. P. 1408. doi: 10.1103/PhysRevLett.49.1408
  2. Leonard A.W. // Phys. Plasmas. 2014. V. 21. P. 090501. doi: 10.1063/1.4894742
  3. Zohm H. // Plasma. Phys. Control. Fusion. 1996. V. 38. P. 105. doi: 10.1088/0741-3335/38/2/001.
  4. Connor J.W. // Plasma. Phys. Control. Fusion. 1998. V. 40. P. 531. doi: 10.1088/0741-3335/40/5/002
  5. Suttrop W. // Plasma. Phys. Control. Fusion. 2000. V. 42. P. A1. doi: 10.1088/0741-3335/42/5A/301
  6. Connor J.W., Kirk A., Wilson H.R. // AIP Conf. Proc. 2008. V. 1013. P. 174. doi: 10.1063/1.2939030
  7. Snyder P.B., Wilson H.R., Ferron J.R., Lao L.L., Leonard A.W., Mossessian D., Murakami M., Osborne T.H., Turnbull A.D., Xu X.Q. // Nucl. Fusion. 2004. V. 44. P. 320. doi: 10.1088/0029-5515/44/2/014
  8. Doyle E.J., Houlberg W.A., Kamada Y., Mukhovatov V., Osborne T.H., Polevoi A., Bateman G., Connor J.W., Cordey J.G., Fujita T., Garbet X., Hahm T.S., Horton L.D., Hubbard A.E., Imbeaux F., Jenko F., Kinsey J.E., Kishimoto Y., Li J., Luce T.C., Martin Y., Ossipenko M., Parail V., Peeters A., Rhodes T.L., Rice J.E., Roach C.M., Rozhansky V., Ryter F., Saibene G., Sartori R., Sips A.C.C., Snipes J.A., Sugihara M., Synakowski E.J., Takenaga H., Takizuka T., Thomsen K., Wade M.R., Wilson H.R., ITPA Transport Physics Topical Group, ITPA Confinement Database and Modelling Topical Group, ITPA Pedestal and Edge Topical Group // Nucl. Fusion. 2007. V. 47. P. S18. doi: 10.1088/0029-5515/47/6/S02
  9. Maggi C.F., Saarelma S., Casson F.J., Challis C., de la Luna E., Frassinetti L., Giroud C., Joffrin E., Simpson J., Beurskens M., Chapman I., Hobirk J., Leyland M., Lomas P., Lowry C., Nunes I., Rimini F., Sips A.C.C., Urano H., JET Contributors // Nucl. Fusion. 2015. V. 55. P. 113031. doi: 10.1088/0029-5515/55/11/113031
  10. Maingi R., Hubbard A.E., Meyer H., Hughes J.W., Kirk A., Maqueda R., Terry J.L., the Alcator C-Mod, MAST and NSTX teams // Nucl. Fusion. 2011. V. 51. P. 063036. doi: 10.1088/0029-5515/51/6/063036
  11. Smith S.F., Kirk A., Chapman-Oplopoiou B., Clark J.G., Ham C.J., Horvath L., Maggi C.F., Scannell R., Saarelma S., the MAST Team // Plasma Phys. Control. Fusion. 2022. V. 64. P. 045024. doi: 10.1088/1361-6587/ac529b
  12. Dickinson D., Roach C.M., Saarelma S., Scannell R., Kirk A., Wilson H.R. // Phys. Rev. Lett. 2012. V. 108. P. 135002. doi: 10.1103/PhysRevLett.108.135002
  13. Petrov Yu.V., Gusev V.K., Sakharov N.V., Minaev V.B., Varfolomeev V.I., Dyachenko V.V., Balachenkov M., Bakharev N.N., Bondarchuk E.N., Bulanin V.V., Chernyshev F.V., Iliasova M.V., Kavin A.A., Khilkevitch E.M., Khromov N.A., Kiselev E.O., Konovalov A.N., Kornev V.A., Krikunov S.V., Kurskiev G.S., Melnik A.D., Miroshnikov I.V.,, Novokhatskii A.N., Zhiltsov N.S., Patrov M.I., Petrov A.V., Ponomarenko A.M., Shulyatiev K.D., Shchegolev P.B., Shevelev A.E., Skrekel O.M., Telnova A.Yu., Tukhmeneva E.A., Tokarev V.A., Tolstyakov S.Yu., Voronin A.V., Yashin A.Yu., Bagryansky P.A., Zhilin E.G., Goryainov V.A. // Nucl. Fusion. 2022. V. 62. P. 042009. doi: 10.1088/1741-4326/ac27c7
  14. Bulanin V.V., Kurskiev G.S., Solokha V.V., Yashin A.Yu., Zhiltsov N.S. // Plasma Phys. Control. Fusion. 2021. V. 63. P. 122001. doi: 10.1088/1361-6587/ac36a4
  15. Solokha V.V., Kurskiev G.S., Yashin A.Yu., Balachenkov I.M., Varfolomeev V.I., Voronin A.V., Gusev V.K., Goryainov V.Yu., Dyachenko V.V., Zhiltsov N.S., Kiselev E.O., Minaev V.B., Novokhatsky A.N., Petrov Yu.V., Ponomarenko A.M., Sakharov N.V., Telnova A.Yu., Tkachenko E.E., Tokarev V.A., Tolstyakov S.Yu., Tukhmeneva E.A., Khromov N.A., Shchegolev P.B. // Plasma Phys. Rep. 2023. V. 49. P. 419. doi: 10.1134/S1063780X23600184
  16. Maingi R., Bell M.G., Fredrickson E.D., Lee K.C., Maqueda R.J., Snyder P., Tritz K., Zweben S.J., Bell R.E., Biewer T.M., Bush C.E., Boedo J., Brooks N.H., Delgado-Aparicio L., Domier C.W., Gates D.A., Johnson D.W., Kaita R., Kaye S.M., Kugel H.W., LeBlanc B.P., Luhmann N.C., Jr., Menard J.E., Mueller D., Park H., Raman R., Roquemore A.L., Sabbagh S.A., Soukhanovskii V.A., Stevenson T., Stutman D. // Phys. Plasmas. 2006. V. 13. P. 092510. doi: 10.1063/1.2226986
  17. Yashin A.Y., Bulanin V.V., Gusev V.K., Minaev V.B., Petrov A.V., Petrov Y.V., Ponomarenko A.M., Varfolomeev V.I. // JINST. 2022. V. 17. P. C01023. doi: 10.1088/1748-0221/17/01/C01023
  18. Bulanin V.V., Yashin A.Y., Petrov A.V., Gusev V.K., Minaev V.B., Patrov M.I., Petrov Y.V., Prisiazhniuk D.V., Varfolomeev V.I. // Rev. Sci. Instrum. 2021. V. 92. P. 033539. doi: 10.1063/5.0030307
  19. Ponomarenko A., Yashin A., Kurskiev G., Minaev V., Petrov A., Petrov Y., Sakharov N., Zhiltsov N. // Sensors. 2023. V. 23. P. 830. doi: 10.3390/s23020830
  20. Yashin A.Y., Bulanin, V.V., Petrov A.V., Gusev V.K., Kurskiev G.S., Minaev V.B., Patrov M.I., Petrov Yu.V. // Plasma Phys. Rep. 2020. V. 46. P. 683. doi: 10.1134/S1063780X20070107
  21. Yashin A.Yu., Bulanin V.V., Gusev V.K., Kurskiev G.S., Patrov M.I., Petrov A.V., Petrov Yu.V., Tolstyakov S.Yu. // Nucl. Fusion. 2018. V. 58. P. 112009. doi: 10.1088/1741-4326/aac4d8
  22. Grover O., Manz P., Yashin A.Y., Réfy D.I., Seidl J., Vianello N., Birkenmeier G., Solano E.R., Sos M., Bohm P., Bilkova P., Hron M., Panek R., the ASDEX Upgrade Team, the COMPASS Team, the Globus-M Team, JET Contributors // Nucl. Fusion. 2024. V. 64. P. 026001. doi: 10.1088/1741-4326/ad0eae
  23. Yashin A.Yu., Bulanin V.V., Gusev V.K., Khromov N.A., Kurskiev G.S., Minaev V.B., Patrov M.I., Petrov A.V., Petrov Yu.V., Prisyazhnyuk D.V., Sakharov N.V., Shchegolev P.B., Tolstyakov S.Yu., Varfolomeev V.I., Wagner F. // Nucl. Fusion. 2014. P. 54. P. 114015. doi: 10.1088/0029-5515/54/11/114015
  24. Bulanin V.V., Wagner F., Varfolomeev V.I., Gusev V.K., Kurskiev G.S., Minaev V.B., Patrov M.I., Petrov A.V., Petrov Yu.V., Prisyazhnyuk D.V., Sakharov N.V., Tolstyakov S.Yu., Khromov N.A., Shchegolev P.B., Yashin A.Yu. // Tech. Phys. Lett. 2014. V. 40. P. 375. doi: 10.1134/S106378501405006X
  25. Bulanin V.V., Bakharev N.N., Gusev V.K., Kurskiev G.S., Minaev V.B., Patrov M.I., Petrov A.V., Petrov Yu.V., Sakharov N.V., Shchegolev P.B., Telnova A.Yu., Tolstyakov S.Yu., Yashin A.Yu. // Phys. Atom. Nuclei. 2020. V. 83. P. 1124. doi: 10.1134/S1063778820070042
  26. Bulanin V.V., Balachenkov I.M., Varfolomeev V.I., Gusev V.K., Kurskiev G.S., Minaev V.B., Patrov M.I., Petrov A.V., Petrov Yu.V., Ponomarenko A.M., Telnova A.Yu., Shchegolev P.B., Yashin A.Yu. // Tech. Phys. Lett. 2021. V. 47. P. 197. doi: 10.1134/S1063785021020206
  27. Yashin A.Yu., Bulanin V.V., Gusev V.K., Kiselev E.O., Kurskiev G.S., Minaev V.B., Patrov M.I., Petrov A.V., Petrov Yu.V., Ponomarenko A.M., Shchegolev P.B. // Nucl. Fusion. 2021. V. 61. P. 092001. doi: 10.1088/1741-4326/ac1297
  28. Yashin A., Ponomarenko A., Balachenkov I., Kurskiev G., Kiselev E., Minaev V., Petrov A., Petrov Y., Sakharov N., Zhiltsov N. // Appl. Sci. 2023. V. 13. P. 3430. doi: 10.3390/app13063430
  29. Bulanin V.V., Gusev V.K., Khromov N.A., Kurskiev G.S., Minaev V.B., Patrov M.I., Petrov A.V., Petrov M.A., Petrov Yu.V., Prisiazhniuk D., Sakharov N.V., Tolstyakov S.Yu., Yashin A.Yu. // Nucl. Fusion. 2019. V. 59. P. 096026. doi: 10.1088/1741-4326/ab2cdf
  30. Yashin A., Teplova N., Zadvitskiy G., Ponomarenko A. // Sensors. 2022. V. 22. P. 9441. doi: 10.3390/s22239441
  31. Bulanin V.V., Gusakov E.Z., Gusev V.K., Zadvitskiy G., Lechte C., Heuraux S., Minaev V.B., Petrov A.V., Petrov Yu.V., Sakharov N.V., Teplova N., Yashin A.Yu. // Plasma Phys. Rep. 2020. V. 46. P. 490. doi: 10.1134/S1063780X20050025
  32. Yashin A., Bulanin V., Petrov A., Ponomarenko A. // Appl. Sci. 2021. V. 11. P. 8975. doi: 10.3390/app11198975
  33. Ponomarenko A., Gusev V., Kiselev E., Kurskiev G., Minaev V., Petrov A., Petrov Y., Sakharov N., Solokha V., Teplova N., Shchegolev P., Yashin A., Zhiltsov N. // Nucl. Fusion. 2024. V. 64. P. 022001. doi: 10.1088/1741-4326/ad0ead
  34. Conway G.D., Lechte C., Poli E., the ASDEX Upgrade Team // Proc. 15th Intnl. Refl. Wksh., France, 2022.
  35. Kurskiev G.S., Sakharov N.V., Gusev V.K., Minaev V.B., Miroshnikov I.V., Petrov Yu.V., Telnova A. Yu., Bakharev N.N., Kiselev E.O., Zhiltsov N.S., Shchegolev P.B., Balachenkov I.M., Varfolomeev V.I., Voronin A.V., Goryainov V.Yu., Dyachenko V.V., Zhilin E.G., Iliasova M.V., Kavin A.A., Konovalov A.N., Krikunov S.V., Lobanov K.M., Melnik A.D., Mineev A.B., Novokhatsky A.N., Patrov M.I., Petrov A.V., Ponomarenko A.M., Skrekel’ O.M., Solovei V.A., Solokha V.V., Tkachenko E.E., Tokarev V.A., Tolstyakov S.Yu., Tukhmeneva E.A., Khilkevitch E.M., Khromov N.A., Chernyshev F.V., Shevelev A.E., Shulyat’ev K.D., Yashin A.Yu. // Plasma Phys. Rep. 2023. V. 49. P. 403. doi: 10.1134/S1063780X23600214
  36. Shchegolev P.B., Minaev V.B., Telnova A.Yu., Varfolomeev V.I., Gusev V.K., Esipov L.A., Zhiltsov N.S., Kolmogorov V.V., Kondakov A.A., Kurskiev G.S., Miroshnikov I.V., Panasenkov A.A., Sorokin A.V., Shikhovtsev I.A. // Plasma Phys. Rep. 2023. V. 49. P. 1501. doi: 10.1134/S1063780X23601098
  37. Kurskiev G.S., Gusev V.K., Sakharov N.V., Balachenkov I.M., Bakharev N.N., Bulanin V.V., Chernyshev F.V., Kavin A.A., Kiselev E.O., Khromov N.A., Minaev V.B., Miroshnikov I.V., Patrov M.I., Petrov A.V., Petrov Yu.V., Shchegolev P.B., Telnova A. Yu., Tokarev V.A., Tolstyakov S.Yu., Tukhmeneva E.A., Varfolomeev V.I., Yashin A.Yu., Zhiltsov N.S. // Nucl. Fusion. 2021. V. 61. P. 064001. doi: 10.1088/1741-4326/abe08c
  38. Ponomarenko A.M., Bulanin V.V., Gusev V.K., Minaev V.B., Petrov A.V., Petrov Yu.V., Yashin A.Yu. // J. Phys.: Conf. Ser. 2021. V. 2103. P. 012210. doi: 10.1088/1742-6596/2103/1/012210
  39. Conway G.D., Schirmer J., Klenge S., Suttrop W., Holzhauer E., the ASDEX Upgrade Team // Plasma Phys. Control. Fusion. 2004. V. 46. P. 951. doi: 10.1088/0741-3335/46/6/003
  40. Tynan G.R., Xu M., Diamond P.H., Boedo J.A., Cziegler I., Fedorczak N., Manz P., Miki K., Thakur S., Schmitz L., Zeng L., Doyle E.J., McKee G.M., Yan Z., Xu G.S., Wan B.N., Wang H.Q., Guo H.Y., Dong J., Zhao K., Cheng J., Hong W.Y., Yan L.W. // Nucl. Fusion. 2013. V. 53. P. 073053. doi: 10.1088/0029-5515/53/7/073053
  41. Schmitz L. // Nucl. Fusion. 2017. V. 57. P. 025003. doi: 10.1088/1741-4326/57/2/025003
  42. Diamond P.H., Itoh S.-I., Itoh K., Hahm T.S. // Plasma Phys. Control. Fusion. 2005. V. 47. P. R35. doi: 10.1088/0741-3335/47/5/R01

Supplementary files

Supplementary Files
Action
1. JATS XML
Download

Copyright (c) 2024 Russian Academy of Sciences