Plasma generator and thermal electron emitter
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United States of America Patent
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May 23, 2017
Grant Date -
Dec 1, 2016
app pub date -
May 16, 2016
filing date -
May 29, 2015
priority date (Note) -
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Abstract
A plasma generator includes: an arc chamber having a plasma generation region in which plasma is generated in the inside thereof; a magnetic field generator configured to apply a magnetic field to the plasma generation region; and a cathode configured to extend in an axial direction along an applying direction of the magnetic field applied to the plasma generation region and provided with a cathode cap that emits thermal electrons at a front end thereof. The cathode cap protrudes toward the inside of the arc chamber in the axial direction and has a shape of which a width in the radial direction perpendicular to the axial direction becomes smaller toward the inside of the arc chamber.
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