Experimental investigation of the potentials modified by radio frequency sheaths during ion cyclotron range of frequency on EAST
- Author
- CM Qin, YP Zhao, HQ Wang, XJ Zhang, BN Wan, Jean-Marie Noterdaeme (UGent) , F Braun, V Bobkov, Hiroshi Kasahara, EH Kong, L Wang, Y Shuai, ZX He and BJ Ding
- Organization
- Abstract
- Recent ion cyclotron range of frequency (ICRF) experiments combined with lower hybrid wave (LHW) on EAST show that LHW coupling can be strongly modified when the LHW launcher is connected magnetically to a powered ICRF antenna. Using Langmuir probes, investigation of radio frequency (RF)-enhanced potential and local plasma parameters under an applied ICRF pulse is carried out on EAST. When the ICRF antenna connected to the probe is powered, localized high positive peaks appear on the floating potential. The dependence of floating potential modifications on various parameters is investigated. These initial results are shown to be consistent with RF sheath physics. A new four-strap antenna is modelled with the high frequency structural simulator (HFSS) code for evaluation of the parallel electrical fields (E-parallel to) and sheath potentials. It is found that the E-parallel to fields with the (0, 0, pi, pi) phase are much higher than those with other phases. Only the (0, pi, pi, 0) phasing has a significant reduction potential compared with the original two-strap antenna at the dipole phase.
- Keywords
- ICRF ANTENNAS, EDGE PLASMA, DENSITY CONVECTION, TORE-SUPRA, FARADAY SCREEN
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Citation
Please use this url to cite or link to this publication: http://hdl.handle.net/1854/LU-3143998
- MLA
- Qin, CM, et al. “Experimental Investigation of the Potentials Modified by Radio Frequency Sheaths during Ion Cyclotron Range of Frequency on EAST.” PLASMA PHYSICS AND CONTROLLED FUSION, vol. 55, no. 1, 2013, doi:10.1088/0741-3335/55/1/015004.
- APA
- Qin, C., Zhao, Y., Wang, H., Zhang, X., Wan, B., Noterdaeme, J.-M., … Ding, B. (2013). Experimental investigation of the potentials modified by radio frequency sheaths during ion cyclotron range of frequency on EAST. PLASMA PHYSICS AND CONTROLLED FUSION, 55(1). https://doi.org/10.1088/0741-3335/55/1/015004
- Chicago author-date
- Qin, CM, YP Zhao, HQ Wang, XJ Zhang, BN Wan, Jean-Marie Noterdaeme, F Braun, et al. 2013. “Experimental Investigation of the Potentials Modified by Radio Frequency Sheaths during Ion Cyclotron Range of Frequency on EAST.” PLASMA PHYSICS AND CONTROLLED FUSION 55 (1). https://doi.org/10.1088/0741-3335/55/1/015004.
- Chicago author-date (all authors)
- Qin, CM, YP Zhao, HQ Wang, XJ Zhang, BN Wan, Jean-Marie Noterdaeme, F Braun, V Bobkov, Hiroshi Kasahara, EH Kong, L Wang, Y Shuai, ZX He, and BJ Ding. 2013. “Experimental Investigation of the Potentials Modified by Radio Frequency Sheaths during Ion Cyclotron Range of Frequency on EAST.” PLASMA PHYSICS AND CONTROLLED FUSION 55 (1). doi:10.1088/0741-3335/55/1/015004.
- Vancouver
- 1.Qin C, Zhao Y, Wang H, Zhang X, Wan B, Noterdaeme J-M, et al. Experimental investigation of the potentials modified by radio frequency sheaths during ion cyclotron range of frequency on EAST. PLASMA PHYSICS AND CONTROLLED FUSION. 2013;55(1).
- IEEE
- [1]C. Qin et al., “Experimental investigation of the potentials modified by radio frequency sheaths during ion cyclotron range of frequency on EAST,” PLASMA PHYSICS AND CONTROLLED FUSION, vol. 55, no. 1, 2013.
@article{3143998, abstract = {{Recent ion cyclotron range of frequency (ICRF) experiments combined with lower hybrid wave (LHW) on EAST show that LHW coupling can be strongly modified when the LHW launcher is connected magnetically to a powered ICRF antenna. Using Langmuir probes, investigation of radio frequency (RF)-enhanced potential and local plasma parameters under an applied ICRF pulse is carried out on EAST. When the ICRF antenna connected to the probe is powered, localized high positive peaks appear on the floating potential. The dependence of floating potential modifications on various parameters is investigated. These initial results are shown to be consistent with RF sheath physics. A new four-strap antenna is modelled with the high frequency structural simulator (HFSS) code for evaluation of the parallel electrical fields (E-parallel to) and sheath potentials. It is found that the E-parallel to fields with the (0, 0, pi, pi) phase are much higher than those with other phases. Only the (0, pi, pi, 0) phasing has a significant reduction potential compared with the original two-strap antenna at the dipole phase.}}, articleno = {{015004}}, author = {{Qin, CM and Zhao, YP and Wang, HQ and Zhang, XJ and Wan, BN and Noterdaeme, Jean-Marie and Braun, F and Bobkov, V and Kasahara, Hiroshi and Kong, EH and Wang, L and Shuai, Y and He, ZX and Ding, BJ}}, issn = {{0741-3335}}, journal = {{PLASMA PHYSICS AND CONTROLLED FUSION}}, keywords = {{ICRF ANTENNAS,EDGE PLASMA,DENSITY CONVECTION,TORE-SUPRA,FARADAY SCREEN}}, language = {{eng}}, location = {{Australian Natl Univ, Canberra, Australia}}, number = {{1}}, title = {{Experimental investigation of the potentials modified by radio frequency sheaths during ion cyclotron range of frequency on EAST}}, url = {{http://doi.org/10.1088/0741-3335/55/1/015004}}, volume = {{55}}, year = {{2013}}, }
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