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Journal of Microwave Power
and Electromagnetic Energy (JMPEE) |
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TITLE |
Fusion Plasma Heating with
High Power Microwave and Millimeter Wave Tubes [PDF] |
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AUTHORS |
E.W.
McCune 1985 20 2 131-136 |
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Abstract Key requirements for
microwave power tubes for fusion heating are high efficiency, long life and stability
in the presence of load mismatches. Operating frequencies presently range
from UHF to 60 GHz, while future machines will operate at frequencies of 2 to
200 GHz with installed heating capacities of tens of megawatts. These
requirements can be met with klystrons for frequencies from 1 to 20 GHz and
with gyrotrons for 20 to 200 GHz. This paper
presents details of existing klystrons and gyrotrons
in plasma heating service. Design and performance information is presented
for the VKS-8269A and VKC-7849 klystrons which provide 500 kW at 2.45 GHz and
250 kW at 4.6 GHz, respectively. Similar information is provided for the
VGA-8050A and VGE-8060A gyrotrons which provide 200
kW at 28 and 60 GHz. The capabilities of klystrons and gyrotrons
as a source of microwave power are reviewed. The design considerations
controlling power capability and efficiency are described along with comments
on reliability with information on field experience. It is shown that
klystrons and gyrotrons are the appropriate devices
for generating the large amounts of microwave power needed for heating in
plasma fusion devices. |
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