对“存在失谐阻抗时惯性光束的快-慢模耦合不稳定性”一文的评论
Comment on "Fast-slow mode coupling instability for coasting beams in the presence of detuning impedance"
摘要：
本文指出了N. Biancacci，E. Metral和M. Migliorati [Phys. Rev. Accel.梁23，124402（2020）]，以下简称文章和作者。具体来说，主要的Eqs。(23)，建议描述模式耦合，被证明是不可接受的，即使作为一个近似。这篇文章声称这对方程的解与CERN PS的pyHEADTAIL模拟“非常一致”，据称图6证明了这一点。如果真的是这样，那将是代码中错误的信号。然而，模拟结果的关键部分实际上并没有显示出来，所展示的一致性具有错觉的所有特征。
英文摘要：
In this comment we show untenability of key points of the recent article of N. Biancacci, E. Metral and M. Migliorati [Phys. Rev. Accel. Beams 23, 124402 (2020)], hereafter the Article and the Authors. Specifically, the main Eqs. (23), suggested to describe mode coupling, are shown to be unacceptable even as an approximation. The Article claims the solution of this pair of equations to be in "excellent agreement" with the pyHEADTAIL simulations for CERN PS, which is purportedly demonstrated by Fig. 6. Were it really so, it would be a signal of a mistake in the code. However, the key part of the simulation results is not actually shown, and the demonstrated agreement has all the features of an illusion.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
