| 摘要 |
A spherical RF source tube which requires no magnetic fields for its operation which consists of two concentric spherical shells. The inner shell, which is open and which is nearly transparent to electrons, is charged positively with respect to the grounded outer shell, which is solid. The outer shell contains ports for the vacuum system, for the high voltage bushing that supports the inner shell, for the output coupling devices, and for plasma devices used in starting and maintaining operation.
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