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November 2025
Latest News
3D-printed tool at SRS makes quicker work of tank waste sampling
A 3D-printed tool has been developed at the Department of Energy’s Savannah River Site in South Carolina that can eliminate months from the job of radioactive tank waste sampling.
Wenjun Yang, Guoqiang Li, Xiang Gao, Xueyu Gong
Fusion Science and Technology | Volume 79 | Number 5 | July 2023 | Pages 528-536
Technical Paper | doi.org/10.1080/15361055.2022.2151279
Articles are hosted by Taylor and Francis Online.
The stability of Alfvén eigenmodes (AEs) driven by fast ions is investigated in the Experimental Advanced Superconducting Tokamak (EAST). It is demonstrated that all AEs found in toroidal AE gaps are stable and that the least stable mode is a reversed shear Alfvén eigenmode (RSAE) with . The calculation results show that collisional damping is the main damping mechanism for toroidal mode number . The excitation threshold for the RSAE is about βcrit,b = 3.33%, bigger than the value of the central beam ion beta βb = 1.01%. The results show that AEs driven by fast ions are stable in EAST, at least for the parameters shown in this work. The effect of beam ion pressure and energy on AE stability is also presented. The drive coming from fast ions increases with the pressure gradient, and the drive mainly comes from 3 resonance.
