skip to main content

DOE PAGESDOE PAGES

Title: Modeling of lithium granule injection in NSTX using M3D-C1

In this paper, we present simulations of pedestal control by lithium granule injection (LGI) in NSTX. A model for small granule ablation has been implemented in the M3D-C1 code (Jardin et al 2012 Comput. Sci. Discovery 5 014002), allowing the simulation of realistic lithium granule injections. 2D and 3D simulations of Li injections in NSTX H-mode plasmas are performed and the effect of granule size, injection angle and velocity on the pedestal gradient increase is studied. The amplitude of the local pressure perturbation caused by the granules is found to be highly dependent on the solid granule size. Adjusting the granule injection velocity allows one to inject more particles at the pedestal top. 3D simulations show the destabilization of high order MHD modes whose amplitude is directly linked to the localized pressure perturbation, which is found to depend on the toroidal localization of the granule density source.
Authors:
 [1] ;  [1] ;  [2] ;  [2] ;  [3] ;  [2] ;  [2]
  1. Princeton Univ., NJ (United States)
  2. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
  3. General Atomics, San Diego, CA (United States)
Publication Date:
Report Number(s):
PPPL-5374
Journal ID: ISSN 0029-5515
Type:
Accepted Manuscript
Journal Name:
Nuclear Fusion
Additional Journal Information:
Journal Volume: 57; Journal Issue: 5; Journal ID: ISSN 0029-5515
Publisher:
IOP Science
Research Org:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
OSTI Identifier:
1358040

Fil, A., Kolemen, E., Ferraro, N., Jardin, S., Parks, P. B., Lunsford, R., and Maingi, R.. Modeling of lithium granule injection in NSTX using M3D-C1. United States: N. p., Web. doi:10.1088/1741-4326/aa66b1.
Fil, A., Kolemen, E., Ferraro, N., Jardin, S., Parks, P. B., Lunsford, R., & Maingi, R.. Modeling of lithium granule injection in NSTX using M3D-C1. United States. doi:10.1088/1741-4326/aa66b1.
Fil, A., Kolemen, E., Ferraro, N., Jardin, S., Parks, P. B., Lunsford, R., and Maingi, R.. 2017. "Modeling of lithium granule injection in NSTX using M3D-C1". United States. doi:10.1088/1741-4326/aa66b1. https://www.osti.gov/servlets/purl/1358040.
@article{osti_1358040,
title = {Modeling of lithium granule injection in NSTX using M3D-C1},
author = {Fil, A. and Kolemen, E. and Ferraro, N. and Jardin, S. and Parks, P. B. and Lunsford, R. and Maingi, R.},
abstractNote = {In this paper, we present simulations of pedestal control by lithium granule injection (LGI) in NSTX. A model for small granule ablation has been implemented in the M3D-C1 code (Jardin et al 2012 Comput. Sci. Discovery 5 014002), allowing the simulation of realistic lithium granule injections. 2D and 3D simulations of Li injections in NSTX H-mode plasmas are performed and the effect of granule size, injection angle and velocity on the pedestal gradient increase is studied. The amplitude of the local pressure perturbation caused by the granules is found to be highly dependent on the solid granule size. Adjusting the granule injection velocity allows one to inject more particles at the pedestal top. 3D simulations show the destabilization of high order MHD modes whose amplitude is directly linked to the localized pressure perturbation, which is found to depend on the toroidal localization of the granule density source.},
doi = {10.1088/1741-4326/aa66b1},
journal = {Nuclear Fusion},
number = 5,
volume = 57,
place = {United States},
year = {2017},
month = {4}
}