Simulation Study of Quasi-snowflake divertor with Ne seeding

To find an effective way to exhaust the heat power for future fusion reactor, snowflake divertor (SFD) is thought as a possible candidate. In the snowflake divertor configuration, the flux expansion is significantly increased in comparison with traditional single-null divertor, which is of benefit to increase the wetted area and therefore decrease the peak heat load onto the divertor target. Meanwhile, the connection length and radiation volume are also increased in SFD configuration, which is considered of benefit to radiate the power in scrape-off layer (SOL). In our previous SOLPS simulation work , a reduction in the peak heat flux is shown for the quasi-snowflake (QSF) divertor in China Fusion Engineering Test Reactor (CFETR), in comparison with the lower-single-null (LSN) divertor.