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Effect of Faraday shields on capacitive coupling

Effect of Faraday shields on capacitive coupling. D.D. Blackwell and F.F. Chen , 2D imaging of a helicon discharge , Plasma Sources Sci. Technol. 6 , 569 ( 1997 ). No shield. With shield. m = +1 mode much stronger than m = –1.

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Effect of Faraday shields on capacitive coupling

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  1. Effect of Faraday shields on capacitive coupling D.D. Blackwell and F.F. Chen, 2D imaging of a helicon discharge, Plasma Sources Sci. Technol.6, 569 (1997) No shield With shield

  2. m = +1 mode much stronger than m = –1 D.D. Blackwell and F.F. Chen, 2D imaging of a helicon discharge, Plasma Sources Sci. Technol.6, 569 (1997) m = –1 m = +1

  3. Development of a time-resolved energy analyzer D.D. Blackwell and F.F. Chen, Time-resolved measurements of the EEDF in a helicon plasma,Plasma Sources Sci. Technol. 10, 226 (2001) RF modulated electron gun for calibration 2-electrode gridded analyzer with RF response

  4. Time-resolved EEDFs show no fast electronsabove a threshold of 10 -4 F.F. Chen and D.D. Blackwell, Upper limit to Landau damping in helicon discharges, Phys. Rev. Lett.82, 2677 (1999) I-V swept by oscillating Vs I-V at two RF phases Loading resistance agrees with calculations w/o L.D. Injecting a current causes a beam-plasma instability

  5. Development of an RF J-dot probe D.D. Blackwell, T.G. Madziwa, D. Arnush, and F.F. Chen, Evidence for Trivelpiece-Gould modes in a helicon discharge,LTP-106 (June, 2001)

  6. Evidence for Trivelpiece-Gould modes D.D. Blackwell, T.G. Madziwa, D. Arnush, and F.F. Chen, Evidence for Trivelpiece-Gould modes in a helicon discharge,LTP-106 (June, 2001) "Wings" are seen in Jz but not in Bz. "Wings" are not predicted by theory if TG modes are neglected.

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