| PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES |
|
|
|
|
The Impact of Beam Deposition on Bootstrap Current of Fast Ion Produced by Neutral Beam Tangential Injection |
| HUANG Qian-Hong, GONG Xue-Yu**, LU Xing-Qiang, YU Jun, CAO Jin-Jia |
Department of Nuclear Science and Technology, University of South China, Hengyang 421001
|
|
| Cite this article: |
|
HUANG Qian-Hong, GONG Xue-Yu, LU Xing-Qiang et al 2015 Chin. Phys. Lett. 32 085202 |
|
|
|
|
Abstract The density profile of fast ions arising from a tangentially injected diffuse neutral beam in tokamak plasma is calculated. The effects of mean free paths and beam tangency radius on the density profile are discussed under typical HL-2A plasmas parameters. The results show that the profile of fast ions is strongly peaked at the center of the plasma when the mean free path at the maximum deuteron density is larger than the minor radius, while the peak value decreases when the mean free path at the maximum deuteron density is larger than twice that of the minor radius due to the beam transmission loss. Moreover, the bootstrap current of fast ions for various mean free paths at the maximum deuteron density is calculated and its density is proved to be closely related to the deposition of the neutral beam. With the electron return current considered, the net current density obviously decreases. Meanwhile, the peak central fast ion density increases when the beam tangency radius approaches the major radius, and the net bootstrap current increases rapidly with the increasing beam tangency radius.
|
|
|
Received: 24 October 2014
Published: 02 September 2015
|
|
| PACS: |
52.50.Gj
|
(Plasma heating by particle beams)
|
| |
52.55.Fa
|
(Tokamaks, spherical tokamaks)
|
|
|
|
|
|
[1] Hirshman S P and Sigmar D J 1981 Nucl. Fusion 21 1079
[2] Shaing K C, Yokoyama M, Wakatani M and Hsu C T 1996 Phys. Plasmas 3 965
[3] Sauter, Angioni C and Lin-Liu Y R 1999 Phys. Plasmas 6 2834
[4] Hirshman S P 1988 Phys. Fluids 31 3150
[5] Shi B R 2004 Chin. Phys. B 13 2097
[6] Andrade M C R and Ludwig G O 1997 Plasma Phys. Control. Fusion 39 1041
[7] Murakami M, Arunasalam V, Bell J D et al 1986 Plasma Phys. Control. Fusion 28 17
[8] Asai T, Suzuki Y, Yoneda T et al 2000 Phys. Plasmas 7 2294
[9] Wang J F, Wu B and Hu C D 2010 Plasma Sci. Technol. 12 289
[10] Liu Y, Isobe M, Peng X D et al 2012 Nucl. Fusion 52 074008
[11] Wang J, Wu B, Wang J et al 2014 J. Fusion Energy 33 20
[12] Xu Y J, Hu C D, Liu S et al 2012 Chin. Phys. Lett. 29 035201
[13] Isobe M, Liu Y, Yang J W et al 2009 Chin. Phys. Lett. 26 105201
[14] Yan L W, Lei G J, Zhong G W et al 2003 Chin. Phys. Lett. 20 1795
[15] Marchenko V S and Lutsenko V V 2001 Phys. Plasmas 8 510
[16] Taguchi M 1996 Nucl. Fusion 36 657
[17] Huang Q H, Gong X Y, Yu J et al 2012 Phys. Scr. 85 055503
[18] Riviere A C 1971 Nucl. Fusion 11 363
[19] Janev R K, Boley C C and Post D E 1998 Plasma Phys. Control. Fusion 40 2079
[20] Rome J A, Callen J D and Clarke J F 1974 Nucl. Fusion 14 141
[21] Mikkelsen D R and Singer C E 1983 Fusion Sci. Technol. 4 237 |
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
