التفاصيل البيبلوغرافية
| العنوان: |
Modeling turbulent impurity transport in the SOL of DIII-D with a reduced model. |
| المؤلفون: |
Zamperini, S, Nichols, J H, Odstrcil, T, Abrams, T, Boedo, J A, Elder, J D, Rudakov, D L, Donovan, D C, Duran, J D, Huang, A |
| المصدر: |
Plasma Physics & Controlled Fusion; May2024, Vol. 66 Issue 5, p1-9, 9p |
| مصطلحات موضوعية: |
PLASMA transport processes, COLLOIDS, DIFFUSION coefficients, ELECTRIC fields, TURBULENCE |
| مستخلص: |
A novel impurity transport model that approximates SOL turbulence as a fluctuating poloidal electric field is shown to be an acceptable replacement for the traditional approach of assigning an arbitrary radial diffusion coefficient to the impurity ions. The model is implemented in the DIVIMP impurity transport code and applied to an L-Mode tungsten divertor experiment on DIII-D. The poloidal electric field is represented as fluctuating between ±1000 V m−1 based on previous measurements. The resulting intermittent vr = E θ × BT transport causes ions to transport both into the core as well as into the far-SOL. Simultaneous agreement with estimates of the W density just inside the separatrix as well as in the far-SOL is obtained (nW ∼ 1014 m−3 and nW ∼ 1012 m−3, respectively). Prompt re-deposition of the W ions was necessary to obtain agreement (fredep ∼ 99%). We conclude that simulating impurity transport using a physics-based approximation for turbulence in the SOL, versus arbitrarily assigning diffusion coefficients, may enable better reactor scale predictions of core impurity contamination. [ABSTRACT FROM AUTHOR] |
|
Copyright of Plasma Physics & Controlled Fusion is the property of IOP Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) |
| قاعدة البيانات: |
Complementary Index |
Full Text Finder