On spurious modes for finite Larmor radius models in the ion cyclotron range of frequencies
- Fusion Energy Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831 (United States)
Spurious resonances exist in the dispersion relations for finite Larmor radius models in plasma heating in the ion cyclotron range of frequencies. The spurious resonances occur when the highest-order coefficient in a fourth-order equation vanishes. It is shown that the spurious resonances cannot be removed by using a sixth-order equation because the highest-order coefficient in the sixth-order equation also vanishes at the same location as the highest-order coefficient in the fourth-order equation. However, the spurious modes are often not excited when solving the corresponding ordinary differential equations (ODEs) for an incident fast wave so that the solutions from the ODEs are often accurate. {copyright} {ital 1995} {ital American} {ital Institute} {ital of} {ital Physics}.
- Research Organization:
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 69069
- Journal Information:
- Physics of Plasmas, Vol. 2, Issue 7; Other Information: PBD: Jul 1995
- Country of Publication:
- United States
- Language:
- English
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