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US 4,789,808 AGranted
Gyrotron device with adjustable pitch factor
AssigneeKabushiki Kaisha Toshiba
InventorKenichi Hayashi
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Abstract
In gyrotron devices, pitch factor and efficiency are directly proportional. When the pitch factor is increased, however, a larger starting current is needed. The available power supply thus limits the pitch factor and subsequently, the efficiency of the device. The present invention is a gyrotron device in which the pitch factor is adjustable. When starting the gyrotron the pitch factor is set to a low level and only a small starting current is required. After the device has been started, the pitch factor can be increased to increase the oscillation efficiency.
Claims6
A gyrotron device comprising:
- an electron gun for producing a beam of electrons traveling along an axis;
- an eletromagnetic field generator for generating an electromagnetic field which interacts with said beam and causes said beam to rotate about said axis;
- and
- adjusting means for adjusting the pitch factor of said beam of electrons to a low level to effectuate easy starting of the gyrotron and to a higher level after starting to increase oscillation efficiency.
1 more element
Dependencies are inferred from the claim text.