Perturbation of Singular Chasma Equation
An ionizing beam (effectrons, ions, atoms, photons) between plane-parallel plates, either parallel or perpendicular to the plates (like in the multipactor effect and hf cavities) may create an accumulating ion charge. The resulting steady state of the chasma (`non-quasi-neutral plasma) has a potential satisfying a quasi-singular non-linear integro-differential equation. The investigation of the perturbations reveals problems due to the singular character of the integrand. However, in the case that the beam density (b) and the ion production (P) are constant the potential is given by (φ)-kx2, where k is the positive root of a cubic equation. Perturbing and linearizing the latter equation yields the change dk for a disturbance db and dP, which may be time dependent provided slow enough that the ions may readapt to the new steady state. Some particular cases are studied. For more involved cases one should return to the singular equation or it may be better to the original set of partial differential equations, which avoids the singularity problem. However, this makes the investigation much more wide and much more involved.
D. K. Callebaut
Physics Department, CGB University of Antwerp, Antwerp B-2020, Belgium
国际会议
Progress in Electromagnetics Research Symposium 2007(2007年电磁学研究新进展学术研讨会)(PIERS 2007)
北京
英文
985-988
2007-03-26（万方平台首次上网日期，不代表论文的发表时间）