TEST-RESULTS OF THE DPC-TJ - STABILITY PERFORMANCE

In this paper the stability test results of the DPC-TJ coil are summar ized. The DPC-TJ coil is a cable-in-conduit, forced-flow type, large s uperconducting coil, cooled by supercritical helium. The stability tes t was performed using an inductive heating method, and the dependences of the stability margins on the operating current and on the duration of heating were investigated. The relation between heating power and the take-off time, defined as the time from the start of heating until the appearance of normalcy in the conductor, was also studied. The ma in results are as follows: the so-called limiting currents were not ob vious with the present test conditions; the influence of the duration of heating on the stability margin was small; and the heating power wa s inversely proportional to the square root of the take-off time, up t o almost-equal-to 20 ms.