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| Main Authors: | , , , , , , , , , , |
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| Format: | Preprint |
| Published: |
2022
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2207.08726 |
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| _version_ | 1866911224621432832 |
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| author | Frank, S. J. Perks, C. J. Nelson, A. O. Qian, T. Jin, S. Cavallaro, A. J. Rutkowski, A. Reiman, A. H. Freidberg, J. P. Rodriguez-Fernandez, P. Whyte, D. G. |
| author_facet | Frank, S. J. Perks, C. J. Nelson, A. O. Qian, T. Jin, S. Cavallaro, A. J. Rutkowski, A. Reiman, A. H. Freidberg, J. P. Rodriguez-Fernandez, P. Whyte, D. G. |
| contents | 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 $\sim90\%$ 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 with $P_\mathrm{fus} > 1000\,$MW despite low confinement. We demonstrate the feasibility of such scenarios here; first by showing that they avoid violating 0-D tokamak limits, and then by performing self-consistent integrated simulations of flattop operation including neoclassical and turbulent transport, magnetic equilibrium, and RF current drive models. Finally we examine the potential effect of introducing negative triangularity with a 0-D 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2207_08726 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Radiative pulsed L-mode operation in ARC-class reactors Frank, S. J. Perks, C. J. Nelson, A. O. Qian, T. Jin, S. Cavallaro, A. J. Rutkowski, A. Reiman, A. H. Freidberg, J. P. Rodriguez-Fernandez, P. Whyte, D. G. Plasma Physics 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 $\sim90\%$ 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 with $P_\mathrm{fus} > 1000\,$MW despite low confinement. We demonstrate the feasibility of such scenarios here; first by showing that they avoid violating 0-D tokamak limits, and then by performing self-consistent integrated simulations of flattop operation including neoclassical and turbulent transport, magnetic equilibrium, and RF current drive models. Finally we examine the potential effect of introducing negative triangularity with a 0-D 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. |
| title | Radiative pulsed L-mode operation in ARC-class reactors |
| topic | Plasma Physics |
| url | https://arxiv.org/abs/2207.08726 |