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

Hossack, A. C.; Sutherland, D. A.; Jarboe, T. R.

doi:10.1063/1.4975663

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

Journal Article · Wed Feb 01 00:00:00 EST 2017 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4975663· OSTI ID:1340676

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Univ. of Washington, Seattle, WA (United States)

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.

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Research Organization:: Univ. of Washington, Seattle, WA (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Fusion Energy Sciences (FES)

Grant/Contract Number:: FG02-96ER54361

OSTI ID:: 1340676

Alternate ID(s):: OSTI ID: 1349342

Journal Information:: Physics of Plasmas, Vol. 24, Issue 2; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 3 works

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References (7)

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Relaxation-time measurement via a time-dependent helicity balance model Wrobel, J. S.; Hansen, C. J.; Jarboe, T. R. Physics of Plasmas, Vol. 20, Issue 1 https://doi.org/10.1063/1.4773401	journal	January 2013
A mechanism for the dynamo terms to sustain closed-flux current, including helicity balance, by driving current which crosses the magnetic field Jarboe, T. R.; Nelson, B. A.; Sutherland, D. A. Physics of Plasmas, Vol. 22, Issue 7 https://doi.org/10.1063/1.4926522	journal	July 2015
Sustained spheromaks with ideal n = 1 kink stability and pressure confinement Victor, B. S.; Jarboe, T. R.; Hansen, C. J. Physics of Plasmas, Vol. 21, Issue 8, Article No. 082504 https://doi.org/10.1063/1.4892261	journal	August 2014
A fully relaxed helicity balance model for an inductively driven spheromak O’Neill, R. G.; Marklin, G. J.; Jarboe, T. R. Physics of Plasmas, Vol. 14, Issue 11 https://doi.org/10.1063/1.2801410	journal	November 2007

Cited By (2)

The nature and source of solar magnetic phenomena Jarboe, T. R.; Benedett, T. E.; Everson, C. J. Physics of Plasmas, Vol. 26, Issue 9 https://doi.org/10.1063/1.5087613	journal	September 2019
Plasma response to sustainment with imposed-dynamo current drive in HIT-SI and HIT-SI3 Hossack, A. C.; Jarboe, T. R.; Chandra, R. N. Nuclear Fusion, Vol. 57, Issue 7 https://doi.org/10.1088/1741-4326/aa6ec7	journal	May 2017

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