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The IPP team operated the W7-X superconducting magnet system at 1.8 T on the plasma axis in the last quarter of 2024. In contradiction to the standard 2.5 T operation the operating current in the conductors was significantly lower (11.027 kA vs. 15.32 kA). Both the lower magnetic field and the lower current affect the hotspot temperature in case of a fast discharge of the coils. Quench simulations were carried out using the THEA code by CryoSoft to study the quench behavior of the W7-X conductor operating at 1.8 T and estimate the maximum hot spot temperature for four different values of the time delay between the start of the heat pulse triggering quench and start of the current dump (0.5, 0.715, 2 and 3 s). The effect of the energy of the heat pulse initiating quench on the hot spot temperature and the Joule heat generation in the strands and in the jacket were analyzed. The development of voltage during a 10 second operation at 1.8 T and constant current was also studied. The observed differences between the quench evolution in the W7-X conductor operating at 1.8 T and at 2.5 T were analyzed and discussed.
