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April 8–10, 2021
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Fusion Science and Technology
ANS webinar to focus on low-dose radiation risk
Join ANS on Thursday, January 21, at noon (ET) for a Q&A with an expert panel as they discuss how to communicate about the risk of low-dose radiation. “Talking About Low-dose Radiation Risk” is a free members-only event that serves as a follow-up to the “Risky Business” President’s Session that took place during the ANS Virtual Winter Meeting last November. The session will take a deeper dive into the many questions generated from the thought-provoking discussion.
Register now to attend the webinar.
Nobuyuki Asakura et al.
Fusion Science and Technology | Volume 63 | Number 1 | May 2013 | Pages 70-75
Articles are hosted by Taylor and Francis Online.
Design study of the magnetic configuration and divertor geometry for the “advanced divertor” in a Demo tokamak reactor is summarized. Equilibrium calculation code, TOSCA, was developed for the super-X divertor (SXD) design by introducing two parameters, i.e. location of the super-X null and a ratio of the poloidal magnetic fluxes at the super-X null to that at the separatrix. SXD has an advantage to increase connection length from the divertor null point to the divertor target (L//div), which is 1.6-1.8 times larger with increasing fSX, compared to that in the conventional long-leg divertor. Whereas flux expansion near the super-X null was increased, increase in the target wet area (Awet) was small. Snowflake divertor (SFD) magnetic configuration was produced by adjusting PFC locations and the current distribution. L//div was largely increased near the SF null in the conventional divertor size. Key issues remain: control scenario for SFnull and high plasma shaping should be developed, and appropriate SFD design is necessary. For the advanced divertor design, divertor coils inside TFC are preferable due to the maximum current and size.