KLYSTRON PHASE CONTROL TECHNIQUES.
Abstract
The objective of the program was to develop a klystron wherein the phase response can be electronically controlled by a single biased drift section. The principle feature of this program was the use of an extended-interaction input resonator designed to excite only the fast space-charge wave. If only one space-charge wave is on the beam, the rf current is constant with axial distance. Under these conditions a biased drift tube section can vary the electron transit time--and hence the phase response of a klystron--without affecting the gain or efficiency of the tube. During the final reporting period the major effort was devoted to testing the experimental phase-controlled klystron. The first experiment with a klystron equipped with the special fast space-charge wave input exciter and bias section was unsuccessful because of oscillations in the bias section. After the bias section design was modified, the experimental klystron operated in a stable manner up to 110 kilovolts. Although the phase-controlled klystron performed in a satisfactory manner, the experimental results were not in agreement with the predicted performance. The phase shift as a function of bias voltage was larger than expected. The bias voltage also caused unexpectedly large variations in the gain and efficiency of the tube. The experimental evidence indicates that the unexpected behavior of the phase-controlled klystron was caused by rf feedback in the bias drift tube section. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1968
- Accession Number
- AD0830321
Entities
People
- Glen Huffman
- Larry Veselovsky