First experimental measurements of a new fast ion driven micro-burst instability in a field-reversed configuration plasma

B. H. Deng; J. D. Douglass; T. Roche; E. V. Belova; M. Beall; M. W. Binderbauer; R. Clary; S. A. Dettrick; H. Gota; E. Granstedt; S. Korepanov; R. M. Magee; A. Necas; M. Onofri; S. Putvinski; A. Smirnov; Y. Song; T. Tajima; M. C. Thompson; M. Tuszewski; A. D. Van Drie; X. Yang; K. Zhai; W. Horton

doi:10.1088/1741-4326/aae5df

First experimental measurements of a new fast ion driven micro-burst instability in a field-reversed configuration plasma

B. H. Deng, J. D. Douglass, T. Roche, E. V. Belova, M. Beall, M. W. Binderbauer, R. Clary, S. A. Dettrick, H. Gota, E. Granstedt, S. Korepanov, R. M. Magee, A. Necas, M. Onofri, S. Putvinski, A. Smirnov, Y. Song, T. Tajima, M. C. Thompson, M. TuszewskiA. D. Van Drie, X. Yang, K. Zhai, W. Horton

PPPL Theory

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Abstract

In modern field-reversed configuration (FRC) experiments (Binderbauer et al 2015 Phys. Plasmas 22 056110) at TAE Technologies, classical FRC instabilities are suppressed by advanced neutral beam injection and edge biasing methods, leading to high plasma confinement and fast ion pressure built-up which is comparable to the bulk plasma pressure. In some of these high performance FRC plasmas, a new macroscopically non-destructive fast ion driven micro-burst instability is observed as periodic small amplitude bursts with frequency down chirping in the diamagnetic drift frequency range, repeating about every 0.1 to 0.5 ms. The occurrence of these micro-bursts and burst-free operation can be controlled by changing the injected neutral beam energy. Major observed characteristics of this new instability are presented. Possible explanation of the phenomenon is suggested.

Original language	English (US)
Article number	126026
Journal	Nuclear Fusion
Volume	58
Issue number	12
DOIs	https://doi.org/10.1088/1741-4326/aae5df
State	Published - Oct 22 2018

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics
Condensed Matter Physics

Keywords

angular momentum
far-infrared laser interferometry
fast ion driven instability
field-reversed configuration
fishbone
micro-burst
rotational instability

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10.1088/1741-4326/aae5df

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Deng, B. H., Douglass, J. D., Roche, T., Belova, E. V., Beall, M., Binderbauer, M. W., Clary, R., Dettrick, S. A., Gota, H., Granstedt, E., Korepanov, S., Magee, R. M., Necas, A., Onofri, M., Putvinski, S., Smirnov, A., Song, Y., Tajima, T., Thompson, M. C., ... Horton, W. (2018). First experimental measurements of a new fast ion driven micro-burst instability in a field-reversed configuration plasma. Nuclear Fusion, 58(12), Article 126026. https://doi.org/10.1088/1741-4326/aae5df

@article{c49cb8cbbc354d2d99c70cb5a0b159c3,

title = "First experimental measurements of a new fast ion driven micro-burst instability in a field-reversed configuration plasma",

abstract = "In modern field-reversed configuration (FRC) experiments (Binderbauer et al 2015 Phys. Plasmas 22 056110) at TAE Technologies, classical FRC instabilities are suppressed by advanced neutral beam injection and edge biasing methods, leading to high plasma confinement and fast ion pressure built-up which is comparable to the bulk plasma pressure. In some of these high performance FRC plasmas, a new macroscopically non-destructive fast ion driven micro-burst instability is observed as periodic small amplitude bursts with frequency down chirping in the diamagnetic drift frequency range, repeating about every 0.1 to 0.5 ms. The occurrence of these micro-bursts and burst-free operation can be controlled by changing the injected neutral beam energy. Major observed characteristics of this new instability are presented. Possible explanation of the phenomenon is suggested.",

keywords = "angular momentum, far-infrared laser interferometry, fast ion driven instability, field-reversed configuration, fishbone, micro-burst, rotational instability",

author = "Deng, \{B. H.\} and Douglass, \{J. D.\} and T. Roche and Belova, \{E. V.\} and M. Beall and Binderbauer, \{M. W.\} and R. Clary and Dettrick, \{S. A.\} and H. Gota and E. Granstedt and S. Korepanov and Magee, \{R. M.\} and A. Necas and M. Onofri and S. Putvinski and A. Smirnov and Y. Song and T. Tajima and Thompson, \{M. C.\} and M. Tuszewski and \{Van Drie\}, \{A. D.\} and X. Yang and K. Zhai and W. Horton",

note = "Publisher Copyright: {\textcopyright} 2018 IAEA, Vienna.",

year = "2018",

month = oct,

day = "22",

doi = "10.1088/1741-4326/aae5df",

language = "English (US)",

volume = "58",

journal = "Nuclear Fusion",

issn = "0029-5515",

publisher = "IOP Publishing Ltd.",

number = "12",

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Deng, BH, Douglass, JD, Roche, T, Belova, EV, Beall, M, Binderbauer, MW, Clary, R, Dettrick, SA, Gota, H, Granstedt, E, Korepanov, S, Magee, RM, Necas, A, Onofri, M, Putvinski, S, Smirnov, A, Song, Y, Tajima, T, Thompson, MC, Tuszewski, M, Van Drie, AD, Yang, X, Zhai, K & Horton, W 2018, 'First experimental measurements of a new fast ion driven micro-burst instability in a field-reversed configuration plasma', Nuclear Fusion, vol. 58, no. 12, 126026. https://doi.org/10.1088/1741-4326/aae5df

TY - JOUR

T1 - First experimental measurements of a new fast ion driven micro-burst instability in a field-reversed configuration plasma

AU - Deng, B. H.

AU - Douglass, J. D.

AU - Roche, T.

AU - Belova, E. V.

AU - Beall, M.

AU - Binderbauer, M. W.

AU - Clary, R.

AU - Dettrick, S. A.

AU - Gota, H.

AU - Granstedt, E.

AU - Korepanov, S.

AU - Magee, R. M.

AU - Necas, A.

AU - Onofri, M.

AU - Putvinski, S.

AU - Smirnov, A.

AU - Song, Y.

AU - Tajima, T.

AU - Thompson, M. C.

AU - Tuszewski, M.

AU - Van Drie, A. D.

AU - Yang, X.

AU - Zhai, K.

AU - Horton, W.

PY - 2018/10/22

Y1 - 2018/10/22

N2 - In modern field-reversed configuration (FRC) experiments (Binderbauer et al 2015 Phys. Plasmas 22 056110) at TAE Technologies, classical FRC instabilities are suppressed by advanced neutral beam injection and edge biasing methods, leading to high plasma confinement and fast ion pressure built-up which is comparable to the bulk plasma pressure. In some of these high performance FRC plasmas, a new macroscopically non-destructive fast ion driven micro-burst instability is observed as periodic small amplitude bursts with frequency down chirping in the diamagnetic drift frequency range, repeating about every 0.1 to 0.5 ms. The occurrence of these micro-bursts and burst-free operation can be controlled by changing the injected neutral beam energy. Major observed characteristics of this new instability are presented. Possible explanation of the phenomenon is suggested.

AB - In modern field-reversed configuration (FRC) experiments (Binderbauer et al 2015 Phys. Plasmas 22 056110) at TAE Technologies, classical FRC instabilities are suppressed by advanced neutral beam injection and edge biasing methods, leading to high plasma confinement and fast ion pressure built-up which is comparable to the bulk plasma pressure. In some of these high performance FRC plasmas, a new macroscopically non-destructive fast ion driven micro-burst instability is observed as periodic small amplitude bursts with frequency down chirping in the diamagnetic drift frequency range, repeating about every 0.1 to 0.5 ms. The occurrence of these micro-bursts and burst-free operation can be controlled by changing the injected neutral beam energy. Major observed characteristics of this new instability are presented. Possible explanation of the phenomenon is suggested.

KW - angular momentum

KW - far-infrared laser interferometry

KW - fast ion driven instability

KW - field-reversed configuration

KW - fishbone

KW - micro-burst

KW - rotational instability

UR - https://www.scopus.com/pages/publications/85056266002

UR - https://www.scopus.com/inward/citedby.url?scp=85056266002&partnerID=8YFLogxK

U2 - 10.1088/1741-4326/aae5df

DO - 10.1088/1741-4326/aae5df

M3 - Article

AN - SCOPUS:85056266002

SN - 0029-5515

VL - 58

JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 12

M1 - 126026

ER -

First experimental measurements of a new fast ion driven micro-burst instability in a field-reversed configuration plasma

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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