Collisional damping of electron bernstein waves and its mitigation by evaporated lithium conditioning in spherical-tokamak plasmas

S. J. Diem; G. Taylor; J. B. Caughman; P. C. Efthimion; H. Kugel; B. P. Leblanc; C. K. Phillips; J. Preinhaelter; S. A. Sabbagh; J. Urban

doi:10.1103/PhysRevLett.103.015002

Collisional damping of electron bernstein waves and its mitigation by evaporated lithium conditioning in spherical-tokamak plasmas

S. J. Diem, G. Taylor, J. B. Caughman, P. C. Efthimion, H. Kugel, B. P. Leblanc, C. K. Phillips, J. Preinhaelter, S. A. Sabbagh, J. Urban

Fusion Technology

Research output: Contribution to journal › Article › peer-review

22 Scopus citations

Abstract

The first experimental verification of electron Bernstein wave (EBW) collisional damping, and its mitigation by evaporated Li conditioning, in an overdense spherical-tokamak plasma has been observed in the National Spherical Torus Experiment (NSTX). Initial measurements of EBW emission, coupled from NSTX plasmas via double-mode conversion to O-mode waves, exhibited <10% transmission efficiencies. Simulations show 80% of the EBW energy is dissipated by collisions in the edge plasma. Li conditioning reduced the edge collision frequency by a factor of 3 and increased the fundamental EBW transmission to 60%.

Original language	English
Article number	015002
Journal	Physical Review Letters
Volume	103
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevLett.103.015002
State	Published - Jun 30 2009

Access to Document

10.1103/PhysRevLett.103.015002

Cite this

Diem, S. J., Taylor, G., Caughman, J. B., Efthimion, P. C., Kugel, H., Leblanc, B. P., Phillips, C. K., Preinhaelter, J., Sabbagh, S. A., & Urban, J. (2009). Collisional damping of electron bernstein waves and its mitigation by evaporated lithium conditioning in spherical-tokamak plasmas. Physical Review Letters, 103(1), Article 015002. https://doi.org/10.1103/PhysRevLett.103.015002

@article{ff1532af067b4650ae5f45c4b5687f04,

title = "Collisional damping of electron bernstein waves and its mitigation by evaporated lithium conditioning in spherical-tokamak plasmas",

abstract = "The first experimental verification of electron Bernstein wave (EBW) collisional damping, and its mitigation by evaporated Li conditioning, in an overdense spherical-tokamak plasma has been observed in the National Spherical Torus Experiment (NSTX). Initial measurements of EBW emission, coupled from NSTX plasmas via double-mode conversion to O-mode waves, exhibited <10\% transmission efficiencies. Simulations show 80\% of the EBW energy is dissipated by collisions in the edge plasma. Li conditioning reduced the edge collision frequency by a factor of 3 and increased the fundamental EBW transmission to 60\%.",

author = "Diem, \{S. J.\} and G. Taylor and Caughman, \{J. B.\} and Efthimion, \{P. C.\} and H. Kugel and Leblanc, \{B. P.\} and Phillips, \{C. K.\} and J. Preinhaelter and Sabbagh, \{S. A.\} and J. Urban",

year = "2009",

month = jun,

day = "30",

doi = "10.1103/PhysRevLett.103.015002",

language = "English",

volume = "103",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "1",

}

TY - JOUR

T1 - Collisional damping of electron bernstein waves and its mitigation by evaporated lithium conditioning in spherical-tokamak plasmas

AU - Diem, S. J.

AU - Taylor, G.

AU - Caughman, J. B.

AU - Efthimion, P. C.

AU - Kugel, H.

AU - Leblanc, B. P.

AU - Phillips, C. K.

AU - Preinhaelter, J.

AU - Sabbagh, S. A.

AU - Urban, J.

PY - 2009/6/30

Y1 - 2009/6/30

N2 - The first experimental verification of electron Bernstein wave (EBW) collisional damping, and its mitigation by evaporated Li conditioning, in an overdense spherical-tokamak plasma has been observed in the National Spherical Torus Experiment (NSTX). Initial measurements of EBW emission, coupled from NSTX plasmas via double-mode conversion to O-mode waves, exhibited <10% transmission efficiencies. Simulations show 80% of the EBW energy is dissipated by collisions in the edge plasma. Li conditioning reduced the edge collision frequency by a factor of 3 and increased the fundamental EBW transmission to 60%.

AB - The first experimental verification of electron Bernstein wave (EBW) collisional damping, and its mitigation by evaporated Li conditioning, in an overdense spherical-tokamak plasma has been observed in the National Spherical Torus Experiment (NSTX). Initial measurements of EBW emission, coupled from NSTX plasmas via double-mode conversion to O-mode waves, exhibited <10% transmission efficiencies. Simulations show 80% of the EBW energy is dissipated by collisions in the edge plasma. Li conditioning reduced the edge collision frequency by a factor of 3 and increased the fundamental EBW transmission to 60%.

UR - https://www.scopus.com/pages/publications/68649083282

U2 - 10.1103/PhysRevLett.103.015002

DO - 10.1103/PhysRevLett.103.015002

M3 - Article

AN - SCOPUS:68649083282

SN - 0031-9007

VL - 103

JO - Physical Review Letters

JF - Physical Review Letters

IS - 1

M1 - 015002

ER -

Collisional damping of electron bernstein waves and its mitigation by evaporated lithium conditioning in spherical-tokamak plasmas

Abstract

Access to Document

Other files and links

Fingerprint

Cite this