ICRF produced thermal barriers in a three-cell axisymmetric tandem mirror

A thermal barrier plasma potential structure in a three-cell axisymmetric tandem mirror has been produced using only the ion cyclotron range of frequencies (ICRF), with a central cell density of up to 1013 cm−3 and a central cell ion temperature of approximately 40 eV. Thermal barrier like potential dips occurred in the region of a magnetic field gradient, at a magnetic beach of a slow wave launched in the end cell. The barrier formation is a result of a combination of radiofrequency trapping, radiofrequency enhanced potentials and μ∇B forces. The barrier pumping is consistent with μ∇B forces and E⃗θ × R⃗ drifts.

[1]  N. Hershkowitz,et al.  Electrostatic end plugging accompanied by a central‐cell density increase in an axisymmetric tandem mirror , 1987 .

[2]  Majeski,et al.  Effect of variable eigenmode excitation on rf stabilization of a mirror plasma. , 1987, Physical review letters.

[3]  N. Hershkowitz,et al.  Interchange stabilization of an axisymmetric single cell mirror using high-frequency electric fields , 1987 .

[4]  N. Hershkowitz,et al.  Eigenmode electric field profiles in cylindrical plasmas , 1987 .

[5]  R. S. Devoto,et al.  Trapping rates in thermal barriers of tandem mirrors , 1987 .

[6]  A. Todd,et al.  The numerical solution of ICRF fields in axisymmetric mirrors , 1986 .

[7]  Chan,et al.  Enhancement of the plasma potential by fluctuating electric fields near the ion cyclotron frequency. , 1985, Physical review letters.

[8]  Nakashima,et al.  Thermal barrier formation and plasma confinement in the axisymmetrized tandem mirror GAMMA 10. , 1985, Physical review letters.

[9]  Noah Hershkowitz,et al.  Direct indication technique of plasma potential with differential emissive probe , 1985 .

[10]  N. Hershkowitz,et al.  Fueling and heating of tandem mirror end cells using rf at the ion‐cyclotron frequency , 1985 .

[11]  C. C. Damm,et al.  Thermal-Barrier Production and Identification in a Tandem Mirror , 1984 .

[12]  B. Vey.  ICRF antenna coupling theory for a cylindrically stratified plasma , 1984 .

[13]  Brian D. McVey,et al.  ICRF antenna coupling theory for a cylindrically stratified plasma , 1984 .

[14]  N. Hershkowitz,et al.  rf stabilization of an axisymmetric tandem mirror , 1983 .

[15]  Brian A. Nelson,et al.  Self‐emissive probes , 1983 .

[16]  N. Hershkowitz,et al.  Experiments in a tandem mirror sustained and heated solely by rf , 1981 .

[17]  A. Molvik.  Large-acceptance-angle gridded analyzers in an axial magnetic field , 1981 .

[18]  J. Kesner.  Tandem-mirror sloshing-electron plugs , 1980 .

[19]  D. E. Baldwin,et al.  Improved tandem mirror fusion reactor , 1979 .

[20]  F. Paoloni.  Boundary effects on M=0,±1 Alfvén waves in a cylindrical, collisionless plasma , 1975 .