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(color online). Measured (dots) and calculated (solid lines) output pulse width after amplification as a function of input pulse width; (a) 28 kV and 137.4 GHz; (b), (c), and (d) are for 35.4 kV and (b) 138.13 GHz, (c) 137.3 GHz, and (d) 138.8 GHz.