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Title: Pellet Fueling and Control of Burning Plasmas in ITER

Abstract

Pellet injection from the inner wall is planned for use on ITER as the primary core fueling system since gas fueling is expected to be highly inefficient in burning plasmas. Tests of the inner wall guide tube have shown that 5mm pellets with up to 300 m/s speeds can survive intact and provide the necessary core fueling rate. Modeling and extrapolation of the inner wall pellet injection experiments from today's smaller tokamaks leads to the prediction that this method will provide efficient core fueling beyond the pedestal region. Using pellets for triggering of frequent small edge localized modes is an attractive additional benefit that the pellet injection system can provide. A description of the ITER pellet injection system capabilities for fueling and ELM triggering are presented and performance expectations and fusion power control aspects are discussed.

Authors:
 [1];  [2];  [1];  [1];  [1];  [1];  [1];  [3];  [1]
  1. ORNL
  2. General Atomics
  3. ITER International Team, Garching, Germany
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
981757
DOE Contract Number:  
DE-AC05-00OR22725
Resource Type:
Journal Article
Resource Relation:
Journal Name: Nuclear Fusion; Journal Volume: 47; Journal Issue: 5
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; EDGE LOCALIZED MODES; EXTRAPOLATION; FORECASTING; GUIDE TUBES; PELLET INJECTION; PELLETS; PERFORMANCE; SIMULATION

Citation Formats

Baylor, Larry R, Parks, P. B., Jernigan, Thomas C, Caughman, John B, Combs, Stephen Kirk, Foust, Charles R, Houlberg, Wayne A, Maruyama, S., and Rasmussen, David A. Pellet Fueling and Control of Burning Plasmas in ITER. United States: N. p., 2007. Web. doi:10.1088/0029-5515/47/5/008.
Baylor, Larry R, Parks, P. B., Jernigan, Thomas C, Caughman, John B, Combs, Stephen Kirk, Foust, Charles R, Houlberg, Wayne A, Maruyama, S., & Rasmussen, David A. Pellet Fueling and Control of Burning Plasmas in ITER. United States. doi:10.1088/0029-5515/47/5/008.
Baylor, Larry R, Parks, P. B., Jernigan, Thomas C, Caughman, John B, Combs, Stephen Kirk, Foust, Charles R, Houlberg, Wayne A, Maruyama, S., and Rasmussen, David A. Mon . "Pellet Fueling and Control of Burning Plasmas in ITER". United States. doi:10.1088/0029-5515/47/5/008.
@article{osti_981757,
title = {Pellet Fueling and Control of Burning Plasmas in ITER},
author = {Baylor, Larry R and Parks, P. B. and Jernigan, Thomas C and Caughman, John B and Combs, Stephen Kirk and Foust, Charles R and Houlberg, Wayne A and Maruyama, S. and Rasmussen, David A},
abstractNote = {Pellet injection from the inner wall is planned for use on ITER as the primary core fueling system since gas fueling is expected to be highly inefficient in burning plasmas. Tests of the inner wall guide tube have shown that 5mm pellets with up to 300 m/s speeds can survive intact and provide the necessary core fueling rate. Modeling and extrapolation of the inner wall pellet injection experiments from today's smaller tokamaks leads to the prediction that this method will provide efficient core fueling beyond the pedestal region. Using pellets for triggering of frequent small edge localized modes is an attractive additional benefit that the pellet injection system can provide. A description of the ITER pellet injection system capabilities for fueling and ELM triggering are presented and performance expectations and fusion power control aspects are discussed.},
doi = {10.1088/0029-5515/47/5/008},
journal = {Nuclear Fusion},
number = 5,
volume = 47,
place = {United States},
year = {Mon Jan 01 00:00:00 EST 2007},
month = {Mon Jan 01 00:00:00 EST 2007}
}