Abstract

A microwave launcher with a ring slot has been designed, allowing a UHV viewing port to be utilized as a dielectric material in order to induce high-density plasma with the surface wave mode in a UHV compatible chamber. Electrostatic probe measurements on the plasma show that the plasma density distribution results from an intensive ionization rate in the vicinity of the dielectric/plasma interface and from the ambipolar diffusion. When nitrogen is mixed to argon gas, the plasma density remains almost constant as a result of the descrete surface mode, whereas the atomic nitrogen density varies in proportion to the nitrogen partial pressure.

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