Abstract :
The use of ferrites as attenuators for traveling-wave tubes has been considered as a means of increasing gain and efficiency. Although a number of attenuators for this purpose have been reported, their actual efficiency in improving tube operation has been heretofore experimentally unverified and open to question. This paper reports the results of measurements performed on traveling wave tubes using ferrite attenuators. Of particular interest is the applicability of ferrite attenuators to electrostatically focused traveling-wave tubes. During this investigation, such a tube was developed which is entirely demountable in nature, allowing interchange of reciprocal and non-reciprocal attenuators. Results indicate a substantial improvement in tube operation using the ferrite attenuator. Also reported are the results of experiments with orthodox magnetically focused tubes incorporating ferrite attenuators.
