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在ＨＬ－１Ｍ装置实验中，多发弹丸注入在ｑ＝１磁面内区域产生了高度峰化的密度和压强分布，明显改善了等离子体约束特性。标志着弹丸注入约束改善的峰化的密度、压强分布，在出现第一个大锯齿后平化。弹丸注入后的锯齿崩溃，在密度和压强峰化因子均较高时，具有在更高密度、更高压强下才出现的类理想的特性。随着弹丸穿透加深，芯部区域的密度（压强）梯度变陡，中心ＭＨＤ活性受到弹丸注入的强烈影响，锯齿崩溃特征从完全重连型变成部分重连型，并在崩溃过程中ｍ＝１模的发展与一个非常定域的密度扰动相耦合。
In the HL-1M device experiment, multiple shots injected into the q = 1 magnetic surface generated a highly peaking density and pressure distribution, significantly improving the plasma confinement properties. Marked the improved peaking density, pressure distribution of the projectile injection constraint, flattened after the first large sawtooth. The sawtooth collapse after projectile injection, with the higher density and pressure peaking factors, possesses the ideal class of properties that appear at higher densities and pressures. As the projectile penetrates deeper, the density (pressure) gradient becomes steeper in the core region, and the central MHD activity is strongly influenced by the projectile injection. The serrated collapse feature changes from completely reconnected to partially reconnected, and during the collapse m = 1 The development of the mode is coupled with a very localized density perturbation.