Progress in stellarator research at IPP-Kharkov

Moiseenko, Vladimir E.; Lozin, Oleksiy V.; Shapoval, Anatoliy M.; Dreval, Mykola B.; Kulyk, Yuliya S.; Mironov, Yuri K.; Romanov, Vladyslav S.; Pashnev, Valeriy K.; Sorokovoy, Eduard L.; Petrushenya, Andriy A.; Ozherel’ev, Fedir I.; Kozulya, Mykhailo M.; Konovalov, Volodymyr G.; Maznichenko, Sergiy M.; Garkusha, Igor E.

doi:10.1515/nuka-2016-0016

Abstract

A new antenna of ‘crankshaft’ type has been installed in the Uragan-2M device in order to increase the plasma density and heating below the ion cyclotron frequency. Antenna operation is modelled by 1D code, which solves boundary problem for time-harmonic Maxwell’s equations in radially non-uniform plasma cylinder. In recent experiments with this antenna, the SXR, CV, OV and OII emission measurements indicate that the light impurity radiation barrier is overcame at this device. Plasma with a temperature of ~50 eV exists during a short period of a few milliseconds. Then the radiation collapse comes owing to strong influx of impurities to the plasma column. A new magnetic diagnostics has been installed at Uragan-3M. Using it the poloidal magnetic field is measured and the shift of toroidal current in major radius is registered. A miniature pinhole camera array for spatially and temporally resolved measurements of soft X-ray (SXR) plasma emission has been recently installed on the U-3M. Different shapes of the SXR emission profile has been observed in different discharge conditions.

References

1. Tereshin, V. I., Beletskii, A. A., Berezhnyj, V. L., Burchenko, P. Ya., Chechkin, V. V., Grigor’eva, L. I., Gubarev, S. P., Konovalov, V. G., Kulaga, A. E., Kurilo, D. V., Lesnyakov, G. G., Losin, A. V., Maznichenko, S. M., Mironov, Yu. K., Moiseenko, V. E., Ozherel’ev, F. I., Opaleva, G. P., Pashnev, V. K., Pavlichenko, O. S., Prokopenko, A. V., Romanov, V. S., Sergeev, Zu. F., Skibenko, A. I., Shapoval, A. N., Shtan’, A. F., Shvets, O. M., Solodovchenko, S. I., Sorokovoy, Ze. L., Tashi, V. S., Tarasov, I. K., Tsybenko, S. A., Voitsenya, V. S., Volkov, E. D., & Zolototrubova, M. I. (2008). First results of the renewed Uragan-2M torsatron. In Proceedings of the 35th EPS Conference on Plasma Physics, 9-13 June 2008. Hersonissos, Greece. ECA 32D:P-1.061.
Search in Google Scholar
2. Moiseenko, V. E., Lozin, A. V., Chechkin, V. V., Chernyshenko, V. Ya., Grigor’eva, L. I., Kramskoi, Ye. D., Korovin, V. B., Kozulya, M. M., Lyssoivan, A. I., Schebetun, A. V., Shapoval, A. N., Shtan’, A. F., Solodovchenko, S. I., Voitsenya, V. S., & Garkusha, I. E. (2014). VHF discharges for wall conditioning at the Uragan-2M torsatron. Nucl. Fusion, 54(3), 033009(5pp). http://dx.doi.org/10.1088/0029-5515/54/3/033009.10.1088/0029-5515/54/3/033009
Search in Google Scholar
3. Dolgopolov, V. V., & Stepanov, K. N. (1965). Cerenkov absorption of Alfvén waves and of fast magneto-acoustic waves in an inhomogeneous plasma. Nucl. Fusion, 5(4), 276(12pp). http://dx.doi.org/1088/0029-5515/5/4/003. (in Russian + Eng. transl.).
Search in Google Scholar
4. Moiseenko, V. E., Volkov, Ye. D., Tereshin, V. I., & Stadnik, Yu. S. (2009). Alfvén resonance heating in Uragan-2M torsatron. Plasma Phys. Rep., 35, 828-833.10.1134/S1063780X09100043
Search in Google Scholar
5. Moiseenko, V. E., Berezhnyj, V. L., Bondarenko, V. N., Burchenko, P. Ya., Castejón, F., Chechkin, V. V., Chernyshenko, V. Ya., Dreval, M. B., Garkusha, I. E., Glazunov, G. P., Grigor’eva, L. I., Hartmann, D., Hidalgo, C., Koch, R., Konovalov, V. G., Kotsubanov, V. D., Kramskoi, Ye. D., Kulaga, A. E., Lozin, A. V., Lyssoivan, A. I., Mironov, V. K., Mysiura, I. N., Pavlichenko, R. O., Pashnev, V. K., Romanov, V. S., Shapoval, A. N., Skibenko, A. I., Slavnyi, A. S., Sorokovoy, E. L., Stadnik, Yu. S., Taran, V. S., Tereshin, V. I., & Voitsenya, V. S. (2011). RF plasma production and heating below ion-cyclotron frequencies in Uragan torsatrons. Nucl. Fusion, 51, 083036. http://dx.doi.org/10.1088/0029-5515/51/8/083036.10.1088/0029-5515/51/8/083036
Search in Google Scholar
6. Moiseenko, V. E., Kasilov, S. V., Lysojvan, A. I., & Plyusnin, V. V. (1994). A study of antenna coupling during ICRF plasma build-up. In Proceedings of the 21st EPS Conference Contribution Fusion Plasma Physics, June 27 - July 1, 1994. Montpellier, France. ECA 18B:980-3.
Search in Google Scholar
7. Behn, R., Collins, G. A., Lister, J. B., & Weisen, H. (1987). Observation of density fluctuations at the resonance layers during Alfven wave heating. Plasma Phys. Control. Fusion, 29(1), 75. DOI: 10.1088/0741-3335/29/1/006.10.1088/0741-3335/29/1/006
Search in Google Scholar
8. Pashnev, V. K., Sorokovoy, E. L., Berezhnyj, V. L., Burchenko, P. Ya., Volkov, E. D., Krasnyj, V. V., Lozin, A. V., Mironov, Yu. K., Petrushenya, A. A., Pinos, I. B., Skibenko, A. I., Slavnyj, A. S., Dreval, M. B., Kulaga, A. Ye., Tsybenko, S. A., & Es’kov, A. Yu. (2010). Transition to the improved confinement mode in torsatron U-3M in range of rare collision frequencies. Probl. Atom. Sci. Techn. Ser. Plasma Phys., 16(6), 17-20.
Search in Google Scholar
9. Dreval, M. (2015). First results of multichord soft X-ray detection Aaray on the U-3M Torsatron. Probl. Atom. Sci. Techn. Ser. Plasma Phys., 16(1), 8-11.
Search in Google Scholar
10. Chechkin, V. V., Pankratov, I. M., Grigor’eva, L. I., Beletskii, A. A., Kasilov, A. A., Burchenko, P. Ya., Lozin, A. V., Tsybenko, S. A., Slavnyj, A. S., Litvinov, A. P., Kulaga, A. Ye., Pavlichenko, R. O., Zamanov, N. V., Mironov, Yu. K., Romanov, V. S., Pashnev, V. K., Maznichenko, S. M., & Volkov, Ye. D. (2012). RF discharge dynamics with passing over L- and H-like mode states in the Uragan-3M Torsatron. Probl. Atom. Sci. Techn. Ser. Plasma Phys., 82(6), 3-7.
Search in Google Scholar
11. Pankratov, I. M., Beletskii, A. A., Berezhnyj, V. L., Burchenko, P. Ya., Chechkin, V. V., Grigor’eva, L. I., Hartmann, D., Koch, R., Konovalov, V. G., Kulaga, A. Ye., Lesnyakov, G. G., Hartmann, D., Lozin, A. V., Lyssoivan, A. I., Maznichenko, S. M., Mironov, Yu. K., Moiseenko, V. Ye., Pashnev, V. K., Petrushenya, A. A., Prokopenko, A. P., Romanov, V. S., Shapoval, A. N., Shtan’, A. F., Sitnikov, D. A., Skibenko, A. I., Slavnyj, A. S., Solodovchenko, S. I., Sorokovoy, E. L., Sorokovoy, Ye. L., Shvets, O. M., Stadnik, Yu. S., Tarasov, I. K., Tereshin, V. I., Tsybenko, S. A., Zamanov, N. V., & Volkov, Ye. D. (2010). Behavior of RF discharge plasmas in the Uragan-3M and Uragan-2M Torsatrons. Contrib. Plasma Phys., 50(6/7), 520-528.10.1002/ctpp.200900012
Search in Google Scholar

Progress in stellarator research at IPP-Kharkov

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