Assertion (A) : A reflex klystron makes use of a single cavity.
Reason (R) : The single cavity performs the functions of buncher as well as catcher cavity.
UGC NET - 2013,
Answer: A
Both statements are true and the reason explains the assertion, which is option (A). A reflex klystron has one resonant cavity. The beam passes through it, is reflected by the repeller and returns through the same cavity, so the same cavity first bunches the electrons and later extracts energy from the bunched beam, acting as buncher and catcher. Options (B), (C) and (D) deny either the assertion or the explanation, but the single-cavity operation is exactly the reason for the single cavity.
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