Experimental Study of the Ohmic Density Limit in HL-1M

As the emphasis of the world’s Tokamak programmes moves towards reactor relevant regimes, the plasma behaviour at high density during the steady state becomes an increasingly important issue. In exploring the operating regime of a Tokamak, researchers have always found a limit in the maximum density that they could achieve. Attempts to raise the density beyond this limit result in a disruption of the discharge. The classical description of the scaling for the density limit is well known as the Murakami-Hugill limit, and a refined seal