Recent Advances in the SPIRIT (Self-organized Plasma with Induction, Reconnection, and Injection Techniques) Concept
Since its inception at the 1997 Innovative Confinement Concept meeting, the Self-organized Plasma with Induction, Reconnection, and Injection Techniques (SPIRIT) concept has been continuously advanced both theoretically and experimentally. The main features of this concept are: (1) formation of large-flux Field Reversed Configuration (FRC) plasmas by merging two spheromaks with opposite helicities; (2) flexibility to assess FRC stability by varying the plasma shape and kinetic parameter, by using passive stabilizers, and by injecting energetic ions; (3) sustainment of the FRC for a time significantly longer than the energy confinement time using an ohmic transformer and/or neutral beam injection. Experiments carried out in TS-3/4 and SSX and more recently in Magnetic Reconnection Experiment (MRX) have further verified the effectiveness of this formation scheme for large-flux FRCs. An improved understanding of FRC stability over plasma shape and kinetic parameter has been obtained in MRX. New numerical simulations showed that FRC plasmas can be globally stabilized by injecting energetic ions. Many of these aspects of the SPIRIT concept can be further studied in the current MRX device.
Keywords
Magnetic confinement field reversed configuration neutral beam injectionReferences
- 1.Tuszewski M. (1988) Nucl. Fusion 28:2033Google Scholar
- 2.Steinhauer L. C. et al., (1996) Fusion Tech. 30:116Google Scholar
- 3.M. Yamada, H. Ji, and P. Heitzenroeder, Proc. ICC “Innovative Approaches to Fusion Energy,” Pleasanton, Calif. Oct. (1997).Google Scholar
- 4.Ji H., Yamada M., Plasma J. (1999) Fusion Res. Series 2:195–197Google Scholar
- 5.M. Yamada, H. Ji, T. A. Carter, S. C. Hsu, R. M. Kulsrud, N. L. Bretz, F. C. Jobes, Y. Ono, M. Katsurai, T. -H. Watanabe, T. Sato, and T. Hayashi, in Fusion Energy 1996. Proc. 16th Int. Conf., Montreal, Canada, 1996. Paper IAEA-CN-64/CP-19.Google Scholar
- 6.Jones I. E., Hugrass W. N. (1981) J. Plasma Phys. 26:441CrossRefGoogle Scholar
- 7.Guo H. Y., Hoffman A. L., Brooks R. D., Peter A. M., Pietrzyk Z. A., Tobin S. J., Votroubek G. R. (2002) Phys. Plasmas 9:185CrossRefGoogle Scholar
- 8.Yamada M., Ono Y., Hayakawa A., Katsurai M., Perkins F. W. (1990) Phys. Rev. Lett. 65:721CrossRefGoogle Scholar
- 9.Ono Y., Yamada M., Akao T., Tajima T., Matsumoto R. (1996) Phys. Rev. Lett. 76:3328CrossRefGoogle Scholar
- 10.Cothran C. D., Falk A., Fefferman A., Landreman M., Brown M. R., Shaffer M. J. (2003) Phys. Plasmas 10:1748CrossRefGoogle Scholar
- 11.S. P. Gerhardt, E. Belova, M. Inomoto, M. Yamada, H. Ji, and Y. Ren, “Improved Stability of Oblate Field-Reversed Configurations through Passive Stabilization and Plasma Shaping,” to be submitted to Phys. Rev. Lett. (2006).Google Scholar
- 12.Tuszewski M., Barnes D. C., Chrien R. E., Cobb J. W., Rej D. J., Siemon R. E., Taggart D. P., Wright B. L. (1991) Phys. Rev. Lett. 66:711CrossRefGoogle Scholar
- 13.Ji H., Yamada M., Kulsrud R., Himura H. (1998) Phys. Plasmas 5:3685CrossRefGoogle Scholar
- 14.A. Ishida, H. Momota, and L. C. Steinhauer, Phys. Fluids 31, 3024 (1988); N. Iwasawa, A. Ishida, and L. C. Steinhauer, Phys. Plasmas 8, 1240 (2001).Google Scholar
- 15.Belova E. V., Jardin S. C., Ji H., Yamada M., Kulsrud R. (2000) Phys. Plasmas 7:4996CrossRefGoogle Scholar
- 16.Belova E. V., Jardin S. C., Ji H., Yamada M., Kulsrud R. (2001) Phys. Plasmas 8:1267CrossRefGoogle Scholar
- 17.D. C. Barnes, Phys. Plasmas 8, 4856 (2001); Phys. Plasmas 9, 560 (2002).Google Scholar
- 18.Yamada H., Katano T., Ishida A., Steinhauer L. C. (2003) Phys. Plasmas 10:1168CrossRefGoogle Scholar
- 19.Ohtani H., Horiuchi R., Sato T. (2003) Phys. Plasmas 10:145CrossRefGoogle Scholar
- 20.Belova E. V., Davidson R. C., Ji H., Yamada M. (2003) Phys. Plasmas 10:2361CrossRefMathSciNetGoogle Scholar
- 21.Belova E. V., Davidson R. C., Ji H., Yamada M. (2004) Phys. Plasma 11:2523CrossRefMathSciNetGoogle Scholar
- 22.Steinhauer L. C., Ishida A. (1997) Phys. Rev. Lett. 79:3423CrossRefGoogle Scholar
- 23.Steinhauer L. C., Yamada H., Ishida A. (2001) Phys. Plasmas 8:4053CrossRefGoogle Scholar
- 24.E. V. Belova, R. Davidson, H. Ji, and M. Yamada, “Advances in the Numerical Modeling of Field-Reversed Configurations”, to appear in Phys. Plasmas. (2006).Google Scholar
- 25.Hammer J. H., Berk H. L. (1982) Nucl. Fusion 22:89Google Scholar
- 26.M. Yamada, H. Ji, S. Gerhardt, E. Belova, R. Davidson, and D. Mikkelsen, “SPIRIT: A Research Program for Oblate Field Reversed Configuration Formation, Stability and Sustainment Studies”, to be submitted (2006).Google Scholar
- 27.Hoffman A. L. (1998) Phys. Plasmas 5:979CrossRefGoogle Scholar
- 28.Cohen S. A., Milroy R. D. (2000) Phys. Plasmas 7:2539CrossRefGoogle Scholar
- 29.Y. Ono, A. Morita, T. Itagaki, and M. Katsurai, in Plasma Physics and Controlled Nuclear Fusion Research 1992. Proc. 14th Int. Conf., Würzburg, Germany, 1992, Vol. 2. (International Atomic Energy Agency, Vienna, 1993), p. 619.Google Scholar