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

Abstract

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:

^[1];

^[1]

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

Publication Date:: Wed Feb 01 00:00:00 EST 2017

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

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

OSTI Identifier:: 1340676

Alternate Identifier(s):: OSTI ID: 1349342

Grant/Contract Number:: FG02-96ER54361

Resource 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)

Country of Publication:: United States

Language:: English

Subject:: 70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats


                    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., 2017. 
Web.  doi:10.1063/1.4975663.

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                    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.  https://doi.org/10.1063/1.4975663

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                    Hossack, A. C., Sutherland, D. A., and Jarboe, T. R. Wed .  
"Derivation of dynamo current drive in a closed-current volume and stable current sustainment in the HIT-SI experiment".  United States.  https://doi.org/10.1063/1.4975663.  https://www.osti.gov/servlets/purl/1340676.

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@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         = {Wed Feb 01 00:00:00 EST 2017},

  month        = {Wed Feb 01 00:00:00 EST 2017}

}

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Works referenced in this record:

Physics issues of a spheromak refluxing scenario
journal, June 2011

Hooper, E. B.
Plasma Physics and Controlled Fusion, Vol. 53, Issue 8
DOI: 10.1088/0741-3335/53/8/085008

Imposed-dynamo current drive
journal, July 2012

Jarboe, T. R.; Victor, B. S.; Nelson, B. A.
Nuclear Fusion, Vol. 52, Issue 8
DOI: 10.1088/0029-5515/52/8/083017

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

Sutherland, D. A.; Jarboe, T. R.; Morgan, K. D.
Fusion Engineering and Design, Vol. 89, Issue 4, p. 412-425
DOI: 10.1016/j.fusengdes.2014.03.072

Relaxation-time measurement via a time-dependent helicity balance model
journal, January 2013

Wrobel, J. S.; Hansen, C. J.; Jarboe, T. R.
Physics of Plasmas, Vol. 20, Issue 1
DOI: 10.1063/1.4773401

A mechanism for the dynamo terms to sustain closed-flux current, including helicity balance, by driving current which crosses the magnetic field
journal, July 2015

Jarboe, T. R.; Nelson, B. A.; Sutherland, D. A.
Physics of Plasmas, Vol. 22, Issue 7
DOI: 10.1063/1.4926522

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

A fully relaxed helicity balance model for an inductively driven spheromak
journal, November 2007

O’Neill, R. G.; Marklin, G. J.; Jarboe, T. R.
Physics of Plasmas, Vol. 14, Issue 11
DOI: 10.1063/1.2801410

Works referencing / citing this record:

The nature and source of solar magnetic phenomena
journal, September 2019

Jarboe, T. R.; Benedett, T. E.; Everson, C. J.
Physics of Plasmas, Vol. 26, Issue 9
DOI: 10.1063/1.5087613

Plasma response to sustainment with imposed-dynamo current drive in HIT-SI and HIT-SI3
journal, May 2017

Hossack, A. C.; Jarboe, T. R.; Chandra, R. N.
Nuclear Fusion, Vol. 57, Issue 7
DOI: 10.1088/1741-4326/aa6ec7

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

Abstract

Citation Formats

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Physics issues of a spheromak refluxing scenario
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Imposed-dynamo current drive
journal, July 2012

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