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

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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).

References

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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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沈阳化工大学材料科学与工程学院沈阳 110142

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).