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Title: Derivation of dynamo current drive in a closed-current volume and stable current sustainment in the HIT-SI experiment

A derivation is given showing that the current inside a closed-current volume can be sustained against resistive dissipation by appropriately phased magnetic perturbations. Imposed-dynamo current drive (IDCD) theory is used to predict the toroidal current evolution in the HIT-SI experiment as a function of magnetic fluctuations at the edge. Analysis of magnetic fields from a HIT-SI discharge shows that the injector-imposed fluctuations are sufficient to sustain the measured toroidal current without instabilities whereas the small, plasma-generated magnetic fluctuations are not sufficiently large to sustain the current.
Authors:
ORCiD logo [1] ; ORCiD logo [1] ; ORCiD logo [1]
  1. Univ. of Washington, Seattle, WA (United States)
Publication Date:
Grant/Contract Number:
FG02-96ER54361
Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 24; Journal Issue: 2; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Research Org:
Univ. of Washington, Seattle, WA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
OSTI Identifier:
1340676
Alternate Identifier(s):
OSTI ID: 1349342

Hossack, A. C., Sutherland, D. A., and Jarboe, T. R.. Derivation of dynamo current drive in a closed-current volume and stable current sustainment in the HIT-SI experiment. United States: N. p., Web. doi:10.1063/1.4975663.
Hossack, A. C., Sutherland, D. A., & Jarboe, T. R.. Derivation of dynamo current drive in a closed-current volume and stable current sustainment in the HIT-SI experiment. United States. doi:10.1063/1.4975663.
Hossack, A. C., Sutherland, D. A., and Jarboe, T. R.. 2017. "Derivation of dynamo current drive in a closed-current volume and stable current sustainment in the HIT-SI experiment". United States. doi:10.1063/1.4975663. https://www.osti.gov/servlets/purl/1340676.
@article{osti_1340676,
title = {Derivation of dynamo current drive in a closed-current volume and stable current sustainment in the HIT-SI experiment},
author = {Hossack, A. C. and Sutherland, D. A. and Jarboe, T. R.},
abstractNote = {A derivation is given showing that the current inside a closed-current volume can be sustained against resistive dissipation by appropriately phased magnetic perturbations. Imposed-dynamo current drive (IDCD) theory is used to predict the toroidal current evolution in the HIT-SI experiment as a function of magnetic fluctuations at the edge. Analysis of magnetic fields from a HIT-SI discharge shows that the injector-imposed fluctuations are sufficient to sustain the measured toroidal current without instabilities whereas the small, plasma-generated magnetic fluctuations are not sufficiently large to sustain the current.},
doi = {10.1063/1.4975663},
journal = {Physics of Plasmas},
number = 2,
volume = 24,
place = {United States},
year = {2017},
month = {2}
}

Works referenced in this record:

The dynomak: An advanced spheromak reactor concept with imposed-dynamo current drive and next-generation nuclear power technologies
journal, April 2014

Sustained spheromaks with ideal n  = 1 kink stability and pressure confinement
journal, August 2014
  • Victor, B. S.; Jarboe, T. R.; Hansen, C. J.
  • Physics of Plasmas, Vol. 21, Issue 8, Article No. 082504
  • DOI: 10.1063/1.4892261