Radiative pulsed L-mode operation in ARC-class reactors

Nuclear Fushion

article

S.J. Frank¹  C.J. Perks¹  A.O. Nelson²  T. Qian³  S. Jin³  A. Cavallaro¹  A. Rutkowski³  A. Reiman³  J.P. Freidberg¹  P. Rodriguez-Fernandez¹  D. Whyte¹ 

[1] Plasma Science and Fusion Center, Massachusetts Institute of Technology;Department of Applied Physics and Applied Mathematics, Columbia University;Princeton Plasma Physics Laboratory, Princeton

关键词: ARC;    tokamak;    pilot plant;    negative triangularity;    L-mode;    high-field;    reactordesign;   

DOI  :  10.1088/1741-4326/ac95ac

来源: Institute of Physics Publishing Ltd.

【 摘 要 】

A new ARC-class, highly-radiative, pulsed, L-mode, burning plasma scenario is developed and evaluated as a candidate for future tokamak reactors. Pulsed inductive operation alleviates the stringent current drive requirements of steady-state reactors, and operation in L-mode affords ELM-free access to sim 90%core radiation fractions, significantly reducing the divertor power handling requirements. In this configuration the fusion power density can be maximized despite L-mode confinement by utilizing high-field to increase plasma densities and current. This allows us to obtain high gain in robust scenarios in compact devices withP _fus > 1000 MW despite low confinement. We demonstrate the feasibility of such scenarios here; first by showing that they avoid violating 0D tokamak limits, and then by performing self-consistent integrated simulations of flattop operation including neoclassical and turbulent transport, magnetic equilibrium, and radiofrequency current drive models. Finally we examine the potential effect of introducing negative triangularity with a 0D model. Our results show high-field radiative pulsed L-mode scenarios are a promising alternative to the typical steady state advanced tokamak scenarios which have dominated tokamak reactor development.

【 授权许可】

Unknown