As the electron beam moves through a klystron’s intercavity drift space
A. Frequency modulation at the input cavity creates velocity modulation at the output cavity
B. Velocity modulation at the input cavity creates density modulation at the output cavity
C. Density modulation at the input cavity creates velocity modulation at the output cavity
D. Phase modulation at the input cavity creates velocity modulation at the output cavity.
Answer: Option B
Coupling into and out of a traveling-wave tube can be accompanied by a
A. Waveguide match
B. Cavity match
C. Direct coax-helix match
D. All of the above
A. A long time constant
B. Low-pass filters
C. The shortest possible time
D. The restricted high-frequency response
A. $${\text{S}} = \frac{{2\lambda {\text{R}}}}{{\text{L}}}$$
B. $${\text{S}} = \frac{{3\lambda {\text{R}}}}{{\text{L}}}$$
C. $${\text{S}} = \frac{{\lambda {\text{R}}}}{{\text{L}}}$$
D. $${\text{S}} = \frac{{\text{L}}}{{\lambda {\text{R}}}}$$
The aquadag coating on the inside of PPI tube is used
A. To focus the beam of primary electrons
B. To shield the electron beam from unidirectional magnetic
C. As a second anode and to prevent the build-up of secondary field
D. All of these
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