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根据等离子体电子密度诊断原理，建立了七道远红外ＨＣＮ激光干涉仪。用电子密度分布特征参数研究了ＨＴ－６Ｍ托卡马克上的边界欧姆加热（ＥＯＨ）、抽气限制器（ＰｕｍｐｉｎｇＬｉｍｉｔｅｒ）和离子回旋共振加热（ＩＣＲＨ）实验中的密度分布变化规律和约束特性。对于ＨＴ－６Ｍ托卡马克装置欧姆放电，密度分布特征参数ｕ约为１．１～１．３；约束改善的放电模式，ｕ上升到１．８～２．０，电子密度分布展宽；当密度分布特征多数ｕ≤０．９时，密度分布峰化，这是大破裂的先兆。
According to the theory of plasma electron density diagnosis, seven far-infrared HCN laser interferometers have been established. The variation of density distribution and confinement characteristics of the boundary Ohmic heating (EOH), pumping limiters and ion cyclotron resonance heating (ICRH) experiments on the HT-6M tokamak were studied by using the electron density distribution parameters. For the ohmic discharge of the HT-6M tokamak device, the density distribution characteristic parameter u is about 1.1-1.3; with improved discharge mode, u increases to 1.8-2.0 and broadens the electron density distribution; when the density Distribution characteristics Most u ≤ 0.9, the density distribution of peaking, which is a harbinger of large rupture.