quadrupole amplifier

quadrupole amplifier

[′kwä·drə‚pōl ′am·plə‚fī·ər]
(electronics)
A low-noise parametric amplifier consisting of an electron-beam tube in which quadrupole fields act on the fast cyclotron wave of the electron beam to produce high amplification at frequencies in the range of 400-800 megahertz.
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