A new two‐pole approximation for the plasma dispersion function Z (s) is obtained by a modified Padé (1/2) approximant. It gives a better agreement than the known two‐pole approximation. It also has the advantage that the same poles are used for Z (s) and its derivative Z′ (s).
REFERENCES
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B. D.
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G. A. Baker, Jr., Essentials of Padé Approximants (Academic, New York, 1975).
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© 1979 American Institute of Physics.
1979
American Institute of Physics
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