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Chinese Physics C> 2009, Vol. 33> Issue(S2) : 171-174 DOI: 10.1088/1674-1137/33/S2/045

Collisional effects on the current-filamentation instability in a dense plasma

  • The collisional current-filamentation instability (CFI) is studied for a nonrelativistic electron beam penetrating an infinite uniform plasma. It is analytically shown that the CFI is driven by the drift-anisotropy rather than the classical anisotropy of the beam and the background plasma. Therefore, collisional effects can either attenuate or enhance the CFI depending on the drift-anisotropy of the beam-plasma system. Numerical results are given for some typical parameters, which show that collisional effects cannot stabilize but enhance the CFI in a dense plasma. Thus, the CFI may play a dominant role in the fast electron transport and deposition relevant to the fast ignition scenario (FIS).

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    [1] . Califano F, Pegoraro F, Bulanov S V. Phys. Rev. E, 1997,56: 963-9692. Weibel E S. Phys. Rev. Lett., 1959, 2: 83-843. Tatarakis M et al. Phys. Rev. Lett., 2003, 90: 1750014. Tabak M et al. Phys. Plasmas, 1994, 1: 1626-16345. Sentoku Y et al. Phys. Plasmas, 2000, 7: 689-6956. Honda M. Phys. Rev. E, 2004, 69: 0164017. Bret A, Deutsch C. Phys. Plasmas, 2005, 12: 0821098. Chrisman B, Sentoku Y, Kemp A J. Phys. Plasmas, 2008,15: 0563099. Molvig K. Phys. Rev. Lett., 1975, 35: 1504-150710. Okada T, Niu K. J. Plasma Phys., 1980, 24: 483-48811. Wallace J M et al. Phys. Fluids, 1987, 30: 1085-108812. Sentoku Y et al. Phys. Rev. Lett., 2003, 90: 15500113. Bhatnagar P L, Gross E P, Krook M. Phys. Rev., 1954, 94:511-52514. Deutsch C et al. Phys. Rev. E, 2005, 72: 02640215. Fried B D, Hedrick C L, McCune J. Phys. Fluids, 1968, 11:249-25216. Bell A R, Davies J R, Guerin S M. Phys. Rev. E, 1998, 58:2471-2473

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HAO Biao, SHENG Zheng-Ming and ZHANG Jie. Collisional effects on the current-filamentation instability in a dense plasma[J]. Chinese Physics C, 2009, 33(S2): 171-174. doi: 10.1088/1674-1137/33/S2/045
HAO Biao, SHENG Zheng-Ming and ZHANG Jie. Collisional effects on the current-filamentation instability in a dense plasma[J]. Chinese Physics C, 2009, 33(S2): 171-174.  doi: 10.1088/1674-1137/33/S2/045 shu
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Received: 2009-01-05
Revised: 1900-01-01
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Collisional effects on the current-filamentation instability in a dense plasma

    Corresponding author: SHENG Zheng-Ming,
  • Received Date: 2009-01-05
  • Accepted Date: 1900-01-01
  • Available Online: 2009-01-08

Abstract: 

The collisional current-filamentation instability (CFI) is studied for a nonrelativistic electron beam penetrating an infinite uniform plasma. It is analytically shown that the CFI is driven by the drift-anisotropy rather than the classical anisotropy of the beam and the background plasma. Therefore, collisional effects can either attenuate or enhance the CFI depending on the drift-anisotropy of the beam-plasma system. Numerical results are given for some typical parameters, which show that collisional effects cannot stabilize but enhance the CFI in a dense plasma. Thus, the CFI may play a dominant role in the fast electron transport and deposition relevant to the fast ignition scenario (FIS).

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