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Experimental observation of left polarized wave absorption near electron cyclotron resonance frequency in helicon antenna produced plasma
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10.1063/1.4789456
/content/aip/journal/pop/20/1/10.1063/1.4789456
http://aip.metastore.ingenta.com/content/aip/journal/pop/20/1/10.1063/1.4789456
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

Schematic of the experimental set up.

Image of FIG. 2.
FIG. 2.

Axial magnetic field versus axial position for a current of 52.5 A passing through six coils in series. The coils are placed at −47.8 cm, −38.5 cm, −20.0 cm, −3.5 cm, +13 cm, and +30 cm. Simulation (full line) and measurement (symbols).

Image of FIG. 3.
FIG. 3.

Variation of electron density (ne), visible light intensity (Ivis), and antenna plasma resistance (Rp) with magnetic field for 500 W at pressure 1.4 × 10−3 mbar. (a) ne at +18 cm, (b) ne at −18 cm, (c) Ivis at +18 cm, (d) Ivis at −18 cm, and (e) Rp.

Image of FIG. 4.
FIG. 4.

Variation of electron density (ne) with magnetic field for 500 W at pressures 8 × 10−4, 1.4 × 10−3, and 2.4 × 10−3 mbar. (a) ne at +18 cm, (b) ne at −18 cm.

Image of FIG. 5.
FIG. 5.

Variation of electron density (ne) with magnetic field for 300, 400, and 500 W at pressure 1.4 × 10−3 mbar. (a) ne at +18 cm and (b) ne at −18 cm.

Image of FIG. 6.
FIG. 6.

Variation of electron density (ne) with magnetic field for 500 W at pressure 1.4 × 10−3 mbar. (a) “normal B” and (b) “reverse B.” ne at +18 cm, (b) ne at −18 cm. Inset of (a) at +18 cm “normal B” (open triangle) and “reverse B” (+).

Image of FIG. 7.
FIG. 7.

Radial variations of axial wave field component of helicon waves measured at z = +18 cm for both directions of magnetic field at (a) 12 G, “normal B” (open diamond) and “reverse B” (open circle) (b) 30 G, “normal B” (open diamond) and “reverse B” (open circle).

Image of FIG. 8.
FIG. 8.

Variation of phase of helicon wave axial magnetic field with axial distance for p = 0.4 × 10−3 mbar, RF power 350 W at B = 30 G (open circle).

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/content/aip/journal/pop/20/1/10.1063/1.4789456
2013-01-31
2014-04-25
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Experimental observation of left polarized wave absorption near electron cyclotron resonance frequency in helicon antenna produced plasma
http://aip.metastore.ingenta.com/content/aip/journal/pop/20/1/10.1063/1.4789456
10.1063/1.4789456
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