Measurement of Heat Flux with Calorimeters in the D-Module of GAMMA 10/PDX

Abstract

In the GAMMA 10/PDX tandem mirror device at the University of Tsukuba, divertor simulation experiments were conducted for realizing detached plasma. A divertor simulation experimental module (D-module), in which a V-shaped target is mounted, was installed in the west end-cell of GAMMA 10/PDX. The spatial distribution of the heat flux was measured with calorimeters on the V-shaped target under target angle conditions of 30^◦, 45^◦ and 60^◦. The spatial distribution depends on the structure of magnetic field in the end-cell. The heat flux depended on the gas species and the amount of gas injection was also investigated. With increasing Ar gas pressure, the ion flux decreased by approximately a factor of four, whereas the heat flux decreased by three fifths.