Zobrazeno 1 - 10
of 47
pro vyhledávání: '"Zhu, Caoxiang"'
Advanced stellarators are typically optimized in two stages. The plasma equilibrium is optimized first, followed by the design of coils/permanent magnets. However, the coils/permanent magnets in the second stage may become too complex to achieve the
Externí odkaz:
http://arxiv.org/abs/2401.14041
Autor:
Liu, Ke, Yu, Guodong, Huang, Yuhua, Mao, Wenzhe, Xie, Yidong, Nie, Xianyi, Li, Hong, Lan, Tao, Xie, Jinlin, Ding, Weixing, Liu, Wandong, Zhuang, Ge, Zhu, Caoxiang
The RFP is a toroidal magnetic configuration in which plasmas can spontaneously transform into different self-organized states. Among various states, the QSH state has a dominant component for the magnetic field and significantly improves confinement
Externí odkaz:
http://arxiv.org/abs/2401.14604
A method is demonstrated to optimize a stellarator's geometry to eliminate magnetic islands and achieve other desired physics properties at the same time. For many physics quantities that have been used in stellarator optimization, including quasisym
Externí odkaz:
http://arxiv.org/abs/2106.14930
One common approach to computing the magnetic field produced by a filamentary current-carrying coil is to approximate the coil as a series of straight segments. The Biot-Savart field from each straight segment is known analytically. However, if the e
Externí odkaz:
http://arxiv.org/abs/2105.12522
Autor:
Landreman, Matt, Zhu, Caoxiang
A problem arising in several engineering areas is to design magnets outside a volume that produce a desired magnetic field inside it. One instance of this problem is stellarator design, where it has recently been shown that permanent magnets can prov
Externí odkaz:
http://arxiv.org/abs/2009.06535
A new stellarator coil design code is introduced that optimizes the position and winding pack orientation of finite-build coils. The new code, called FOCUSADD, performs gradient-based optimization in a high-dimensional, non-convex space. The derivati
Externí odkaz:
http://arxiv.org/abs/2009.00196
Autor:
Zhu, Caoxiang, Hammond, Kenneth, Brown, Thomas, Gates, David, Zarnstorff, Michael, Corrigan, Keith, Sibilia, Marc, Feibush, Eliot
We introduce a topology optimization method to design permanent magnets for advanced stellarators. Recent researches show that permanent magnets have great potentials to simplify stellarator coils. We adopt state-of-the-art numerical techniques to de
Externí odkaz:
http://arxiv.org/abs/2005.05504
We have developed a fast method to design perpendicular permanent magnets for simplifying stellarator coils based on existing codes. Coil complexity is one of the main challenges for stellarators. To date, only electromagnetic coils have been used to
Externí odkaz:
http://arxiv.org/abs/1912.05144
Autor:
Zhu, Caoxiang, Gates, David A., Hudson, Stuart R., Liu, Haifeng, Xu, Yuhong, Shimizu, Akihiro, Okamura, Shoichi
Publikováno v:
Nuclear Fusion, 2019
Error fields are predominantly attributed to inevitable coil imperfections. Controlling error fields during coil fabrication and assembly is crucial for stellarators. Excessively tight coil tolerance increases time and cost, and, in part, led to the
Externí odkaz:
http://arxiv.org/abs/1904.04147
Finding an easy-to-build coils set has been a critical issue for stellarator design for decades. Conventional approaches assume a toroidal "winding" surface. We'll investigate if the existence of winding surface unnecessarily constrains the optimizat
Externí odkaz:
http://arxiv.org/abs/1705.02333