Academic Journal
Zero-Turbulence Manifold in a Toroidal Plasma
| العنوان: | Zero-Turbulence Manifold in a Toroidal Plasma |
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| المؤلفون: | Highcock, E. G., Schekochihin, A. A., Cowley, S. C., Barnes, Michael, Parra Diaz, Felix Ignacio, Roach, C. M., Dorland, W. |
| المساهمون: | Massachusetts Institute of Technology. Department of Nuclear Science and Engineering, Massachusetts Institute of Technology. Plasma Science and Fusion Center, Barnes, Michael, Parra Diaz, Felix Ignacio |
| المصدر: | APS |
| بيانات النشر: | American Physical Society |
| سنة النشر: | 2012 |
| المجموعة: | DSpace@MIT (Massachusetts Institute of Technology) |
| الوصف: | Sheared toroidal flows can cause bifurcations to zero-turbulent-transport states in tokamak plasmas. The maximum temperature gradients that can be reached are limited by subcritical turbulence driven by the parallel velocity gradient. Here it is shown that q/ϵ (magnetic field pitch/inverse aspect ratio) is a critical control parameter for sheared tokamak turbulence. By reducing q/ϵ, far higher temperature gradients can be achieved without triggering turbulence, in some instances comparable to those found experimentally in transport barriers. The zero-turbulence manifold is mapped out, in the zero-magnetic-shear limit, over the parameter space (γ[subscript E], q/ϵ, R/L[subscript T]), where γ[subscript E] is the perpendicular flow shear and R/L[subscript T] is the normalized inverse temperature gradient scale. The extent to which it can be constructed from linear theory is discussed. |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | application/pdf |
| اللغة: | English |
| تدمد: | 0031-9007 1079-7114 |
| Relation: | http://dx.doi.org/10.1103/PhysRevLett.109.265001; Physical Review Letters; http://hdl.handle.net/1721.1/77169; Highcock, E. G. et al. “Zero-Turbulence Manifold in a Toroidal Plasma.” Physical Review Letters 109.26 (2012): n. pag. CrossRef. © 2012 American Physical Society; orcid:0000-0001-9621-7404 |
| الاتاحة: | http://hdl.handle.net/1721.1/77169 |
| Rights: | Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. |
| رقم الانضمام: | edsbas.DE43C2DC |
| قاعدة البيانات: | BASE |
| تدمد: | 00319007 10797114 |
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