Multiple broadband Alfvnic chirping modes (CMs), with frequencies in the wide range of f ∼ 35–150 kHz and chirping down rapidly, are found in HL-2A neutral beam injection plasmas, and the CMs can even coexist. The frequency chirping down process can be completed within ∼1 ms, and the frequency shift can reach 30–50 kHz. The CMs propagate in ion diamagnetic drift directions poloidally. The toroidal mode number is confirmed to be n = 1, 2, 3 and 4 for the f ∼ 35–65, 55–90, 70–120 and 100–150 kHz CMs, respectively. The CMs are more like to be energetic-particle continuum modes (EPMs), since the modes almost locate on the Alfvn continuum.

在 HL-2A 中性束注入等离子体中发现了多种宽带 Alfvnic 啁啾模式（CMs），频率在f ∼ 35-150 kHz 的宽范围内，并且啁啾迅速下降，CMs 甚至可以共存。频率啁啾过程可在~1 ms内完成，频移可达30-50 kHz。CM 在离子抗磁漂移方向上极向地传播。对于f ∼ 35-65、55-90、70-120 和 100-150 kHz CM，环形模式数被确认为n = 1、2、3 和 4 。CM 更像是高能粒子连续谱 (EPM)，因为这些模式几乎位于 Alfvn 连续谱上。