Electron transport in the presence of long (nanosecond) laser pulses can be significantly different from that of magnetohydrodynamics calculations using Braginskii’s transport theory, due to the distortion of the underlying electron distribution function from a Maxwellian. To correctly model the transport under conditions relevant to direct and indirect-drive inertial fusion plasmas, the Vlasov–Fokker–Planck equation for the electrons should be solved; however, this is computationally intensive. Modified transport coefficients have been calculated for a distribution function appropriate to a plasma heated by inverse-bremsstrahlung, i.e., a super-Gaussian. The resulting transport was then compared to a Vlasov–Fokker–Planck code. Furthermore, it was shown that existing magnetohydrodynamics codes can be modified using the new transport coefficients and made more accurate by up to ten times with a modest computational cost.
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September 2008
Research Article|
September 26 2008
Transport in the presence of inverse bremsstrahlung heating and magnetic fields
C. P. Ridgers;
C. P. Ridgers
1Central Laser Facility,
STFC Rutherford-Appleton Laboratory
, Chilton, Didcot, Oxfordshire, OX11 0QX, United Kingdom
2Blackett Laboratory,
Imperial College of Science Technology and Medicine
, London, SW7 2AZ, United Kingdom
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A. G. R. Thomas;
A. G. R. Thomas
2Blackett Laboratory,
Imperial College of Science Technology and Medicine
, London, SW7 2AZ, United Kingdom
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R. J. Kingham;
R. J. Kingham
2Blackett Laboratory,
Imperial College of Science Technology and Medicine
, London, SW7 2AZ, United Kingdom
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A. P. L. Robinson
A. P. L. Robinson
1Central Laser Facility,
STFC Rutherford-Appleton Laboratory
, Chilton, Didcot, Oxfordshire, OX11 0QX, United Kingdom
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Phys. Plasmas 15, 092311 (2008)
Article history
Received:
March 07 2008
Accepted:
August 11 2008
Citation
C. P. Ridgers, A. G. R. Thomas, R. J. Kingham, A. P. L. Robinson; Transport in the presence of inverse bremsstrahlung heating and magnetic fields. Phys. Plasmas 1 September 2008; 15 (9): 092311. https://doi.org/10.1063/1.2978092
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