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A helix TWT having unprecedented power across the full K/Ka band (18–40 GHz) has been developed. This TWT has a minimum CW output power greater than 130 W over the full band and greater than 200 W for most of the band (19 to 38 GHz). This K/Ka band helix TWT development has leveraged the underlying technology from L-3 ETI's high-power millimeter-wave helix TWTs that were developed over the last several...
Data from experimental testing of a beamstick designed and built for a 670 GHz extended interaction klystron are compared against 2D and 3D beam optics simulations using the MICHELLE code. A methodology is presented to establish the “as-built” geometry from these comparisons. Excellent agreement with experimental beam current and transmission data is observed across a wide range of electrode voltages...
We present measurements of secondary electron emission obtained with a new NRL measurement system. This system allows us to measure in two orthogonal angular directions, the energy-dependent emission for different incident angles and beam energies.
We present the results of experimental measurements on an 18-beam S-band multiple-beam klystron. The electron gun has met its perveance design goal of 4.8 μPerv with very good beam transmission (>97% in the absence of rf). Preliminary rf testing has shown amplification across the full 400-MHz band (2.9 to 3.3 GHz). The MBK was recently re-gunned to correct a high pressure gas issue; further results...
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